{"title":"Optical Filters \u0026 Coated Optics","description":"\u003cp\u003eFind optical filters and coated optics by the function you need. Compare measured reference spectra, then discuss the specification, dimensions and operating conditions for your order.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/wavelength-selection-filters\"\u003eWavelength Selection Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/color-correction-filters\"\u003eColor Correction Filters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/beam-control-optics\"\u003eBeam Control \u0026amp; Coated Optics\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eLooking up a sample you already have? Keep its original product identifier when contacting us. Sample curves guide selection; the agreed order specification defines the supplied product.\u003c\/p\u003e","products":[{"product_id":"cto-062","title":"CTO-062 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-062)\u003c\/h2\u003e\n\u003cp\u003eCTO-062 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 27.7% over 400-500 nm, 42.2% over 500-600 nm, 89.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 27.7% average transmission; the range is 19.1-45.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 42.2% average transmission; the range is 20.1-80.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 89.4% average transmission; the range is 80.4-95.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 567.1 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-062.html\" title=\"CTO-062 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-062\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-062 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 27.7% over 400-500 nm; 42.2% over 500-600 nm; 89.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 567.1 nm mean for CTO-062?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-062, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516665704703,"sku":"CTO-062","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-062-spectrum.jpg?v=1778712822"},{"product_id":"ar1s-vnir-01","title":"AR1S-VNIR-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR1S-VNIR-01)\u003c\/h2\u003e\n\u003cp\u003eAR1S-VNIR-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 494-1000 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1000 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 350-353 nm; 494-1000 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 96% at 799 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 550-950 nm:\u003c\/strong\u003e 95.595%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 494-1000 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR1S-VNIR-01.html\" title=\"AR1S-VNIR-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR1S-VNIR-01\u003c\/h2\u003e\n\u003ch3\u003eWhich wavelengths should I check first for AR1S-VNIR-01?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 95.595% average transmission over 550-950 nm. Start with the interval that covers your source and detector. The measurement covers 300-1000 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eCan I read surface reflectance directly from the AR1S-VNIR-01 transmission chart?\u003c\/h3\u003e\n\u003cp\u003eThe AR1S-VNIR-01 measurement is transmission through the complete sample, including 95.595% averaged over 550-950 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Single-Side \/ Visible-NIR","offer_id":48516665737471,"sku":"AR1S-VNIR-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar1s-vnir-01-spectrum.jpg?v=1778712823"},{"product_id":"ar1s-multi4-01","title":"AR1S-MULTI4-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR1S-MULTI4-01)\u003c\/h2\u003e\n\u003cp\u003eAR1S-MULTI4-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 1010-2050 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 900-2050 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 1010-2050 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 900-923 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 97.6% at 1611 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1024-1104 nm:\u003c\/strong\u003e 95.694%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1260-1340 nm:\u003c\/strong\u003e 96.607%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1480-1650 nm:\u003c\/strong\u003e 97.444%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1960-2040 nm:\u003c\/strong\u003e 96.176%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 1010-2050 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR1S-MULTI4-01.html\" title=\"AR1S-MULTI4-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR1S-MULTI4-01\u003c\/h2\u003e\n\u003ch3\u003eWhich wavelengths should I check first for AR1S-MULTI4-01?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 95.694% average transmission over 1024-1104 nm; 96.607% average transmission over 1260-1340 nm; 97.444% average transmission over 1480-1650 nm; 96.176% average transmission over 1960-2040 nm. Start with the interval that covers your source and detector. The measurement covers 900-2050 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eCan I read surface reflectance directly from the AR1S-MULTI4-01 transmission chart?\u003c\/h3\u003e\n\u003cp\u003eThe AR1S-MULTI4-01 measurement is transmission through the complete sample, including 95.694% averaged over 1024-1104 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Single-Side \/ Visible-NIR","offer_id":48516665770239,"sku":"AR1S-MULTI4-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar1s-multi4-01-spectrum.jpg?v=1778712824"},{"product_id":"ar1s-swir-01","title":"AR1S-SWIR-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR1S-SWIR-01)\u003c\/h2\u003e\n\u003cp\u003eAR1S-SWIR-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 1097-1800 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 1000-1800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 1097-1800 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 97.6% at 1616 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1260-1630 nm:\u003c\/strong\u003e 97.288%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 1097-1800 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR1S-SWIR-01.html\" title=\"AR1S-SWIR-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR1S-SWIR-01\u003c\/h2\u003e\n\u003ch3\u003eHow do I compare AR1S-SWIR-01 with another coated optic?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 97.288% average transmission over 1260-1630 nm. Start with the interval that covers your source and detector. The measurement covers 1000-1800 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eWhat else matters when specifying AR1S-SWIR-01 for my optical assembly?\u003c\/h3\u003e\n\u003cp\u003eThe AR1S-SWIR-01 measurement is transmission through the complete sample, including 97.288% averaged over 1260-1630 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Single-Side \/ Short-Wave IR","offer_id":48516665803007,"sku":"AR1S-SWIR-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar1s-swir-01-spectrum.jpg?v=1778712825"},{"product_id":"ar1s-nir-dual-01","title":"AR1S-NIR-DUAL-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR1S-NIR-DUAL-01)\u003c\/h2\u003e\n\u003cp\u003eAR1S-NIR-DUAL-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 717-1500 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 700-1500 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 717-1500 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 97.3% at 1480 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 800-900 nm:\u003c\/strong\u003e 95.880%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1250-1350 nm:\u003c\/strong\u003e 97.075%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 717-1500 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR1S-NIR-DUAL-01.html\" title=\"AR1S-NIR-DUAL-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR1S-NIR-DUAL-01\u003c\/h2\u003e\n\u003ch3\u003eWhat transmission does the AR1S-NIR-DUAL-01 measured sample show?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 95.880% average transmission over 800-900 nm; 97.075% average transmission over 1250-1350 nm. Start with the interval that covers your source and detector. The measurement covers 700-1500 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eDoes high transmission alone establish the reflection specification for AR1S-NIR-DUAL-01?\u003c\/h3\u003e\n\u003cp\u003eThe AR1S-NIR-DUAL-01 measurement is transmission through the complete sample, including 95.880% averaged over 800-900 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Single-Side \/ Near-Infrared","offer_id":48516665901311,"sku":"AR1S-NIR-DUAL-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar1s-nir-dual-01-spectrum.jpg?v=1778712826"},{"product_id":"ar2s-swir-01","title":"AR2S-SWIR-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-SWIR-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-SWIR-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 1400-1800 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 1400-1800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 1400-1800 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 99.9% at 1655 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1505-1605 nm:\u003c\/strong\u003e 99.694%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 1400-1800 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-SWIR-01.html\" title=\"AR2S-SWIR-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-SWIR-01\u003c\/h2\u003e\n\u003ch3\u003eWhich wavelengths should I check first for AR2S-SWIR-01?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 99.694% average transmission over 1505-1605 nm. Start with the interval that covers your source and detector. The measurement covers 1400-1800 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eCan I read surface reflectance directly from the AR2S-SWIR-01 transmission chart?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-SWIR-01 measurement is transmission through the complete sample, including 99.694% averaged over 1505-1605 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ Short-Wave IR","offer_id":48516665934079,"sku":"AR2S-SWIR-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-swir-01-spectrum.jpg?v=1778712827"},{"product_id":"ar2s-rnir-01","title":"AR2S-RNIR-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-RNIR-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-RNIR-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 564-1192 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 349-432 nm; 564-1192 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-324 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 99.5% at 937 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 625-900 nm:\u003c\/strong\u003e 98.198%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 564-1192 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-RNIR-01.html\" title=\"AR2S-RNIR-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-RNIR-01\u003c\/h2\u003e\n\u003ch3\u003eHow do I compare AR2S-RNIR-01 with another coated optic?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 98.198% average transmission over 625-900 nm. Start with the interval that covers your source and detector. The measurement covers 300-1200 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eWhat else matters when specifying AR2S-RNIR-01 for my optical assembly?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-RNIR-01 measurement is transmission through the complete sample, including 98.198% averaged over 625-900 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ Red-NIR","offer_id":48516665999615,"sku":"AR2S-RNIR-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-rnir-01-spectrum.jpg?v=1778712827"},{"product_id":"ar2s-uvb-01","title":"AR2S-UVB-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-UVB-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-UVB-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 349-800 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 349-800 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-313 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 97.2% at 411 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 370-440 nm:\u003c\/strong\u003e 96.046%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNear-ultraviolet\/violet optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 349-800 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect by the documented near-UV\/violet wavelengths; the SKU identifier is not a UVB-band specification.\u003c\/li\u003e\n\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-UVB-01.html\" title=\"AR2S-UVB-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-UVB-01\u003c\/h2\u003e\n\u003ch3\u003eWhat transmission does the AR2S-UVB-01 measured sample show?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 96.046% average transmission over 370-440 nm. Start with the interval that covers your source and detector. The measurement covers 300-800 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eDoes high transmission alone establish the reflection specification for AR2S-UVB-01?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-UVB-01 measurement is transmission through the complete sample, including 96.046% averaged over 370-440 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ UV","offer_id":48516666032383,"sku":"AR2S-UVB-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-uvb-01-spectrum.jpg?v=1778712828"},{"product_id":"ar2s-mp-01","title":"AR2S-MP-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-MP-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-MP-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 393-764 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 393-764 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Near-unity transmission is indicated, but the measurement baseline requires confirmation before quoting a peak value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 425-680 nm:\u003c\/strong\u003e 99.460%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 393-764 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-MP-01.html\" title=\"AR2S-MP-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-MP-01\u003c\/h2\u003e\n\u003ch3\u003eWhat transmission does the AR2S-MP-01 measured sample show?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 99.460% average transmission over 425-680 nm. Start with the interval that covers your source and detector. The measurement covers 300-800 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eDoes high transmission alone establish the reflection specification for AR2S-MP-01?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-MP-01 measurement is transmission through the complete sample, including 99.460% averaged over 425-680 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ Visible","offer_id":48516666097919,"sku":"AR2S-MP-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-mp-01-spectrum.jpg?v=1778712829"},{"product_id":"ar2s-vnir-01","title":"AR2S-VNIR-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-VNIR-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-VNIR-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 369-1123 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 369-1123 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 99.5% at 722 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 400-1000 nm:\u003c\/strong\u003e 97.503%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 369-1123 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-VNIR-01.html\" title=\"AR2S-VNIR-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-VNIR-01\u003c\/h2\u003e\n\u003ch3\u003eWhich wavelengths should I check first for AR2S-VNIR-01?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 97.503% average transmission over 400-1000 nm. Start with the interval that covers your source and detector. The measurement covers 300-1200 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eCan I read surface reflectance directly from the AR2S-VNIR-01 transmission chart?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-VNIR-01 measurement is transmission through the complete sample, including 97.503% averaged over 400-1000 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ Visible-NIR","offer_id":48516666130687,"sku":"AR2S-VNIR-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-vnir-01-spectrum.jpg?v=1778712831"},{"product_id":"ar2s-vis-01","title":"AR2S-VIS-01 Anti-reflection coating","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/anti-reflective-ar-coatings\"\u003eAnti-Reflective Coatings\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eAnti-reflection coating (AR2S-VIS-01)\u003c\/h2\u003e\n\u003cp\u003eAR2S-VIS-01 is an anti-reflection coating. The measured curve shows a high-transmission region at approximately 365-800 nm. Use it when you want to pass a broad range of wavelengths. Add a separate filter if you need to select a specific band.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 365-800 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 99.3% at 495 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 400-700 nm:\u003c\/strong\u003e 98.761%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging optical windows:\u003c\/strong\u003e Consider this window when the wavelengths you want to pass fall within 365-800 nm. Confirm the substrate and coated surfaces for the assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared optical paths:\u003c\/strong\u003e Consider it when several wavelengths need to pass through the same window. Add separate spectral selection if the channels need to be isolated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument throughput improvement:\u003c\/strong\u003e Check how much light the coated optic passes against the needs of your system. Confirm reflectance, working angle and surface quality for your design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eTransmission is broadband and does not itself separate wavelength channels. Confirm the required reflectance, coated surfaces, substrate and angle of incidence.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/AR2S-VIS-01.html\" title=\"AR2S-VIS-01 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about AR2S-VIS-01\u003c\/h2\u003e\n\u003ch3\u003eHow do I compare AR2S-VIS-01 with another coated optic?\u003c\/h3\u003e\n\u003cp\u003eThe sample data gives 98.761% average transmission over 400-700 nm. Start with the interval that covers your source and detector. The measurement covers 300-800 nm; it does not establish performance outside that range.\u003c\/p\u003e\n\u003ch3\u003eWhat else matters when specifying AR2S-VIS-01 for my optical assembly?\u003c\/h3\u003e\n\u003cp\u003eThe AR2S-VIS-01 measurement is transmission through the complete sample, including 98.761% averaged over 400-700 nm. A surface-reflection specification needs its own measurement conditions. Tell us the substrate, coated surfaces and working angle so we can compare the coating in the assembly you actually plan to use.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Anti-Reflective Coating \/ Both-Sides \/ Visible","offer_id":48516666163455,"sku":"AR2S-VIS-01","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ar2s-vis-01-spectrum.jpg?v=1778712831"},{"product_id":"cto-061","title":"CTO-061 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-061)\u003c\/h2\u003e\n\u003cp\u003eCTO-061 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 18.2% over 400-500 nm, 32.9% over 500-600 nm, 83.7% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 18.2% average transmission; the range is 5.2-53.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 32.9% average transmission; the range is 5.6-87.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 83.7% average transmission; the range is 81.3-88.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 572.1 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-061.html\" title=\"CTO-061 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-061\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-061 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 18.2% over 400-500 nm; 32.9% over 500-600 nm; 83.7% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 572.1 nm mean for CTO-061?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-061, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666196223,"sku":"CTO-061","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-061-spectrum.jpg?v=1778712832"},{"product_id":"cto-060","title":"CTO-060 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-060)\u003c\/h2\u003e\n\u003cp\u003eCTO-060 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 8% over 400-500 nm, 33.5% over 500-600 nm, 83.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 8% average transmission; the range is 6.9-10.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 33.5% average transmission; the range is 7.3-88.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 83.1% average transmission; the range is 67.7-88.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 571.5 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-060.html\" title=\"CTO-060 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-060\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-060 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 8% over 400-500 nm; 33.5% over 500-600 nm; 83.1% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 571.5 nm mean for CTO-060?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-060, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516666228991,"sku":"CTO-060","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-060-spectrum.jpg?v=1778712832"},{"product_id":"cto-059","title":"CTO-059 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-059)\u003c\/h2\u003e\n\u003cp\u003eCTO-059 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 61.7% over 400-500 nm, 73.1% over 500-600 nm, 84.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 61.7% average transmission; the range is 59.9-65.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 73.1% average transmission; the range is 65.9-79.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 84.4% average transmission; the range is 79.8-87.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 528.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-059.html\" title=\"CTO-059 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-059\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-059 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 61.7% over 400-500 nm; 73.1% over 500-600 nm; 84.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 528.0 nm mean for CTO-059?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-059, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/8 CTO","offer_id":48516666261759,"sku":"CTO-059","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-059-spectrum.jpg?v=1778712833"},{"product_id":"cto-058","title":"CTO-058 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-058)\u003c\/h2\u003e\n\u003cp\u003eCTO-058 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 53.7% over 400-500 nm, 67% over 500-600 nm, 83.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 53.7% average transmission; the range is 51.7-58% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 67% average transmission; the range is 58-75.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 83.1% average transmission; the range is 75.9-88.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 565.8 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-058.html\" title=\"CTO-058 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-058\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-058 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 53.7% over 400-500 nm; 67% over 500-600 nm; 83.1% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 565.8 nm mean for CTO-058?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-058, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/8 CTO","offer_id":48516666294527,"sku":"CTO-058","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-058-spectrum.jpg?v=1778712834"},{"product_id":"cto-057","title":"CTO-057 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-057)\u003c\/h2\u003e\n\u003cp\u003eCTO-057 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 15.7% over 400-500 nm, 30.1% over 500-600 nm, 88.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 15.7% average transmission; the range is 14.3-16.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 30.1% average transmission; the range is 14.6-67.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 88.1% average transmission; the range is 67.2-93.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 583.8 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-057.html\" title=\"CTO-057 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-057\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-057 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 15.7% over 400-500 nm; 30.1% over 500-600 nm; 88.1% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 583.8 nm mean for CTO-057?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-057, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666327295,"sku":"CTO-057","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-057-spectrum.jpg?v=1778712835"},{"product_id":"cto-056","title":"CTO-056 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-056)\u003c\/h2\u003e\n\u003cp\u003eCTO-056 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 29.4% over 400-500 nm, 37.8% over 500-600 nm, 91.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 29.4% average transmission; the range is 8.4-89% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 37.8% average transmission; the range is 25.1-71.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91.1% average transmission; the range is 71.3-95.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 582.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-056.html\" title=\"CTO-056 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-056\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-056 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 29.4% over 400-500 nm; 37.8% over 500-600 nm; 91.1% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 582.7 nm mean for CTO-056?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-056, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/4 CTO","offer_id":48516666360063,"sku":"CTO-056","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-056-spectrum.jpg?v=1778712836"},{"product_id":"cto-054","title":"CTO-054 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-054)\u003c\/h2\u003e\n\u003cp\u003eCTO-054 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 11.9% over 400-500 nm, 14.5% over 500-600 nm, 72.7% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 11.9% average transmission; the range is 2.1-31.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 14.5% average transmission; the range is 9.5-22.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 72.7% average transmission; the range is 21.9-92.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 621.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-054.html\" title=\"CTO-054 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-054\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-054 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 11.9% over 400-500 nm; 14.5% over 500-600 nm; 72.7% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 621.4 nm mean for CTO-054?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-054, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516666392831,"sku":"CTO-054","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-054-spectrum.jpg?v=1778712837"},{"product_id":"cto-053","title":"CTO-053 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-053)\u003c\/h2\u003e\n\u003cp\u003eCTO-053 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 35.9% over 400-500 nm, 29.9% over 500-600 nm, 79.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 35.9% average transmission; the range is 9.6-71.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 29.9% average transmission; the range is 22.5-52.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 79.2% average transmission; the range is 52.5-89.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 597.2 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-053.html\" title=\"CTO-053 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-053\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-053 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 35.9% over 400-500 nm; 29.9% over 500-600 nm; 79.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 597.2 nm mean for CTO-053?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-053, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666425599,"sku":"CTO-053","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-053-spectrum.jpg?v=1778712838"},{"product_id":"cto-052","title":"CTO-052 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-052)\u003c\/h2\u003e\n\u003cp\u003eCTO-052 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 29.9% over 400-500 nm, 46% over 500-600 nm, 89.3% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 29.9% average transmission; the range is 19.1-59.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 46% average transmission; the range is 20.7-86.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 89.3% average transmission; the range is 79.4-96% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 561.2 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-052.html\" title=\"CTO-052 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-052\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-052 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 29.9% over 400-500 nm; 46% over 500-600 nm; 89.3% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 561.2 nm mean for CTO-052?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-052, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666458367,"sku":"CTO-052","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-052-spectrum.jpg?v=1778712839"},{"product_id":"cto-050","title":"CTO-050 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-050)\u003c\/h2\u003e\n\u003cp\u003eCTO-050 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 20.5% over 400-500 nm, 47.6% over 500-600 nm, 86.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 20.5% average transmission; the range is 15.5-26.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 47.6% average transmission; the range is 15.5-81.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 86.2% average transmission; the range is 81.1-91% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 553.2 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-050.html\" title=\"CTO-050 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-050\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-050 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 20.5% over 400-500 nm; 47.6% over 500-600 nm; 86.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 553.2 nm mean for CTO-050?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-050, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666491135,"sku":"CTO-050","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-050-spectrum.jpg?v=1778712839"},{"product_id":"cto-049","title":"CTO-049 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-049)\u003c\/h2\u003e\n\u003cp\u003eCTO-049 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 18.7% over 400-500 nm, 43.8% over 500-600 nm, 88.9% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 18.7% average transmission; the range is 15.7-31.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 43.8% average transmission; the range is 21.9-73.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 88.9% average transmission; the range is 73.2-93.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 564.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-049.html\" title=\"CTO-049 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-049\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-049 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 18.7% over 400-500 nm; 43.8% over 500-600 nm; 88.9% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 564.0 nm mean for CTO-049?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-049, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666523903,"sku":"CTO-049","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-049-spectrum.jpg?v=1778712840"},{"product_id":"cto-048","title":"CTO-048 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-048)\u003c\/h2\u003e\n\u003cp\u003eCTO-048 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 31.1% over 400-500 nm, 22.5% over 500-600 nm, 74.8% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 31.1% average transmission; the range is 3.5-89.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 22.5% average transmission; the range is 17.1-40.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 74.8% average transmission; the range is 32.2-95.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 411.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-048.html\" title=\"CTO-048 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-048\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-048 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 31.1% over 400-500 nm; 22.5% over 500-600 nm; 74.8% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 411.4 nm mean for CTO-048?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-048, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666556671,"sku":"CTO-048","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-048-spectrum.jpg?v=1778712841"},{"product_id":"cto-047","title":"CTO-047 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-047)\u003c\/h2\u003e\n\u003cp\u003eCTO-047 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 18.8% over 400-500 nm, 46.2% over 500-600 nm, 89.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 18.8% average transmission; the range is 9.4-41.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 46.2% average transmission; the range is 39.3-69.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 89.4% average transmission; the range is 69.8-94.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 576.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-047.html\" title=\"CTO-047 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-047\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-047 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 18.8% over 400-500 nm; 46.2% over 500-600 nm; 89.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 576.4 nm mean for CTO-047?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-047, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666589439,"sku":"CTO-047","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-047-spectrum.jpg?v=1778712842"},{"product_id":"cto-046","title":"CTO-046 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-046)\u003c\/h2\u003e\n\u003cp\u003eCTO-046 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 18.3% over 400-500 nm, 45.4% over 500-600 nm, 88.8% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 18.3% average transmission; the range is 8.8-45.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 45.4% average transmission; the range is 36.5-69.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 88.8% average transmission; the range is 69.7-94.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 575.8 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-046.html\" title=\"CTO-046 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-046\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-046 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 18.3% over 400-500 nm; 45.4% over 500-600 nm; 88.8% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 575.8 nm mean for CTO-046?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-046, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666622207,"sku":"CTO-046","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-046-spectrum.jpg?v=1778712843"},{"product_id":"cto-044","title":"CTO-044 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-044)\u003c\/h2\u003e\n\u003cp\u003eCTO-044 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 32.7% over 400-500 nm, 46.2% over 500-600 nm, 91.5% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 32.7% average transmission; the range is 21.3-68.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 46.2% average transmission; the range is 23.1-81.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91.5% average transmission; the range is 81.4-94.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 560.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-044.html\" title=\"CTO-044 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-044\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-044 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 32.7% over 400-500 nm; 46.2% over 500-600 nm; 91.5% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 560.7 nm mean for CTO-044?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-044, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/4 CTO","offer_id":48516666654975,"sku":"CTO-044","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-044-spectrum.jpg?v=1778712844"},{"product_id":"cto-042","title":"CTO-042 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-042)\u003c\/h2\u003e\n\u003cp\u003eCTO-042 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 18.2% over 400-500 nm, 42.1% over 500-600 nm, 87.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 18.2% average transmission; the range is 8.3-54.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 42.1% average transmission; the range is 29.8-62.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 87.4% average transmission; the range is 62.3-94.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 583.9 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-042.html\" title=\"CTO-042 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-042\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-042 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 18.2% over 400-500 nm; 42.1% over 500-600 nm; 87.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 583.9 nm mean for CTO-042?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-042, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666687743,"sku":"CTO-042","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-042-spectrum.jpg?v=1778712844"},{"product_id":"cto-041","title":"CTO-041 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-041)\u003c\/h2\u003e\n\u003cp\u003eCTO-041 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 11.6% over 400-500 nm, 45.2% over 500-600 nm, 84.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 11.6% average transmission; the range is 8.9-19.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 45.2% average transmission; the range is 19.4-76% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 84.2% average transmission; the range is 76-86.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 559.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-041.html\" title=\"CTO-041 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-041\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-041 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 11.6% over 400-500 nm; 45.2% over 500-600 nm; 84.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 559.6 nm mean for CTO-041?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-041, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666720511,"sku":"CTO-041","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-041-spectrum.jpg?v=1778712845"},{"product_id":"cto-040","title":"CTO-040 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-040)\u003c\/h2\u003e\n\u003cp\u003eCTO-040 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 27.1% over 400-500 nm, 49% over 500-600 nm, 92.5% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 27.1% average transmission; the range is 2.6-80.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 49% average transmission; the range is 3.6-95.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 92.5% average transmission; the range is 90.3-95.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 552.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-040.html\" title=\"CTO-040 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-040\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-040 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 27.1% over 400-500 nm; 49% over 500-600 nm; 92.5% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 552.0 nm mean for CTO-040?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-040, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/4 CTO","offer_id":48516666753279,"sku":"CTO-040","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-040-spectrum.jpg?v=1778712846"},{"product_id":"cto-039","title":"CTO-039 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-039)\u003c\/h2\u003e\n\u003cp\u003eCTO-039 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 27.9% over 400-500 nm, 57.3% over 500-600 nm, 93.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 27.9% average transmission; the range is 11.9-42.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 57.3% average transmission; the range is 19.9-95% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 93.2% average transmission; the range is 89.8-95.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 547.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-039.html\" title=\"CTO-039 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-039\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-039 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 27.9% over 400-500 nm; 57.3% over 500-600 nm; 93.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 547.4 nm mean for CTO-039?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-039, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666786047,"sku":"CTO-039","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-039-spectrum.jpg?v=1778712847"},{"product_id":"cto-038","title":"CTO-038 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-038)\u003c\/h2\u003e\n\u003cp\u003eCTO-038 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 15.6% over 400-500 nm, 49.2% over 500-600 nm, 90.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 15.6% average transmission; the range is 13.2-22.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 49.2% average transmission; the range is 14.6-93.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 90.4% average transmission; the range is 87.1-95.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 555.7 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-038.html\" title=\"CTO-038 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-038\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-038 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 15.6% over 400-500 nm; 49.2% over 500-600 nm; 90.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 555.7 nm mean for CTO-038?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-038, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666818815,"sku":"CTO-038","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-038-spectrum.jpg?v=1778712848"},{"product_id":"cto-037","title":"CTO-037 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-037)\u003c\/h2\u003e\n\u003cp\u003eCTO-037 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 22.3% over 400-500 nm, 55.2% over 500-600 nm, 91.5% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 22.3% average transmission; the range is 18.2-25.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 55.2% average transmission; the range is 19.4-94% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 91.5% average transmission; the range is 89.9-93.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 550.1 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-037.html\" title=\"CTO-037 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-037\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-037 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 22.3% over 400-500 nm; 55.2% over 500-600 nm; 91.5% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 550.1 nm mean for CTO-037?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-037, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516666851583,"sku":"CTO-037","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-037-spectrum.jpg?v=1778712849"},{"product_id":"cto-036","title":"CTO-036 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-036)\u003c\/h2\u003e\n\u003cp\u003eCTO-036 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 12.7% over 400-500 nm, 24.2% over 500-600 nm, 78.7% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 12.7% average transmission; the range is 0.3-34.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 24.2% average transmission; the range is 18.2-36.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 78.7% average transmission; the range is 36.5-95.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 610.9 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-036.html\" title=\"CTO-036 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-036\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-036 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 12.7% over 400-500 nm; 24.2% over 500-600 nm; 78.7% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 610.9 nm mean for CTO-036?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-036, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666884351,"sku":"CTO-036","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-036-spectrum.jpg?v=1778712851"},{"product_id":"cto-035","title":"CTO-035 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-035)\u003c\/h2\u003e\n\u003cp\u003eCTO-035 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 9.9% over 400-500 nm, 31.8% over 500-600 nm, 87.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 9.9% average transmission; the range is 0.5-23.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 31.8% average transmission; the range is 21.6-49.1% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 87.2% average transmission; the range is 49.1-95.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 600.5 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-035.html\" title=\"CTO-035 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-035\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-035 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 9.9% over 400-500 nm; 31.8% over 500-600 nm; 87.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 600.5 nm mean for CTO-035?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-035, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516666917119,"sku":"CTO-035","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-035-spectrum.jpg?v=1778712852"},{"product_id":"cto-034","title":"CTO-034 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-034)\u003c\/h2\u003e\n\u003cp\u003eCTO-034 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 23.2% over 400-500 nm, 12.8% over 500-600 nm, 58.3% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 23.2% average transmission; the range is 2.6-72.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 12.8% average transmission; the range is 9.8-20.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 58.3% average transmission; the range is 19.8-92.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 645.5 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-034.html\" title=\"CTO-034 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-034\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-034 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 23.2% over 400-500 nm; 12.8% over 500-600 nm; 58.3% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 645.5 nm mean for CTO-034?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-034, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516666949887,"sku":"CTO-034","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-034-spectrum.jpg?v=1778712853"},{"product_id":"cto-033","title":"CTO-033 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-033)\u003c\/h2\u003e\n\u003cp\u003eCTO-033 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 11.8% over 400-500 nm, 13.7% over 500-600 nm, 63% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 11.8% average transmission; the range is 2.7-22.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 13.7% average transmission; the range is 10.7-23.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 63% average transmission; the range is 23.8-90.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 638.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-033.html\" title=\"CTO-033 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-033\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-033 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 11.8% over 400-500 nm; 13.7% over 500-600 nm; 63% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 638.0 nm mean for CTO-033?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-033, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516666982655,"sku":"CTO-033","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-033-spectrum.jpg?v=1778712854"},{"product_id":"cto-032","title":"CTO-032 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-032)\u003c\/h2\u003e\n\u003cp\u003eCTO-032 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 37.6% over 400-500 nm, 21.9% over 500-600 nm, 66.7% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 37.6% average transmission; the range is 9.7-66.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 21.9% average transmission; the range is 17.7-29.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 66.7% average transmission; the range is 29.6-90.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 632.4 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-032.html\" title=\"CTO-032 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-032\u003c\/h2\u003e\n\u003ch3\u003eWhat do the measured values tell me about CTO-032 on white light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 37.6% over 400-500 nm; 21.9% over 500-600 nm; 66.7% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 632.4 nm mean for CTO-032?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-032, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516667015423,"sku":"CTO-032","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-032-spectrum.jpg?v=1778712856"},{"product_id":"cto-029","title":"CTO-029 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-029)\u003c\/h2\u003e\n\u003cp\u003eCTO-029 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 35.1% over 400-500 nm, 53.9% over 500-600 nm, 85.1% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 35.1% average transmission; the range is 14.7-49.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 53.9% average transmission; the range is 43-74.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 85.1% average transmission; the range is 59.5-96.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 70% transmission:\u003c\/strong\u003e Approximately 595.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-029.html\" title=\"CTO-029 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-029\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-029 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 35.1% over 400-500 nm; 53.9% over 500-600 nm; 85.1% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 70% crossing near 595.6 nm mean for CTO-029?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 70% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-029, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516667048191,"sku":"CTO-029","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-029-spectrum.jpg?v=1778712857"},{"product_id":"cto-028","title":"CTO-028 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-028)\u003c\/h2\u003e\n\u003cp\u003eCTO-028 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 34.1% over 400-500 nm, 49.4% over 500-600 nm, 85.5% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 34.1% average transmission; the range is 32.8-35.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 49.4% average transmission; the range is 35-66.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 85.5% average transmission; the range is 66.2-95.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 553.1 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-028.html\" title=\"CTO-028 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-028\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-028 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 34.1% over 400-500 nm; 49.4% over 500-600 nm; 85.5% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 553.1 nm mean for CTO-028?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-028, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/4 CTO","offer_id":48516667080959,"sku":"CTO-028","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-028-spectrum.jpg?v=1778712859"},{"product_id":"cto-027","title":"CTO-027 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-027)\u003c\/h2\u003e\n\u003cp\u003eCTO-027 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 17.6% over 400-500 nm, 30% over 500-600 nm, 68.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 17.6% average transmission; the range is 10.6-56.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 30% average transmission; the range is 18.3-42.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 68.4% average transmission; the range is 42.7-91.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 621.2 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-027.html\" title=\"CTO-027 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-027\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-027 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 17.6% over 400-500 nm; 30% over 500-600 nm; 68.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 621.2 nm mean for CTO-027?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-027, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516667179263,"sku":"CTO-027","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-027-spectrum.jpg?v=1778712860"},{"product_id":"cto-025","title":"CTO-025 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-025)\u003c\/h2\u003e\n\u003cp\u003eCTO-025 is listed as a warming color-correction filter. The supplied factory files contain different curves for this ID. Ask KUPO to confirm which version matches your sample or order before choosing the wavelength and transmission specifications.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource selection:\u003c\/strong\u003e Multiple factory versions are available. The comparison chart presents them separately; no numerical version is approved here.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication development:\u003c\/strong\u003e Use the available curves to discuss the required source, detector and wavelength response with KUPO. Confirm the product version before finalizing the application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eConfirm which factory version matches the sample you already have.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectra: unconfirmed versions\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-025.html\" title=\"CTO-025 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(850px,calc(43vw + 350px),940px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-025\u003c\/h2\u003e\n\u003ch3\u003eWhich CTO-025 curve should I use?\u003c\/h3\u003e\n\u003cp\u003eThe factory files contain two different versions under this reference. Neither has been selected as the order specification. Send us your sample-book edition, an existing sample or the specification you need so we can identify the matching version.\u003c\/p\u003e\n\u003ch3\u003eCan I still use CTO-025 as a starting point for a warming filter?\u003c\/h3\u003e\n\u003cp\u003eYes, as a discussion reference. The two curves are shown separately above so you can explain which response you need. Confirm the version before comparing transmission values or choosing dimensions for an order.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 3\/4 CTO","offer_id":48516667244799,"sku":"CTO-025","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-025-spectrum.jpg?v=1778712861"},{"product_id":"cto-022","title":"CTO-022 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-022)\u003c\/h2\u003e\n\u003cp\u003eCTO-022 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 19.3% over 400-500 nm, 30.2% over 500-600 nm, 67.4% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 19.3% average transmission; the range is 12.7-34.5% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 30.2% average transmission; the range is 13.9-52.6% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 67.4% average transmission; the range is 52.6-78.7% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 594.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-022.html\" title=\"CTO-022 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-022\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-022 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 19.3% over 400-500 nm; 30.2% over 500-600 nm; 67.4% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 594.0 nm mean for CTO-022?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-022, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516667277567,"sku":"CTO-022","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-022-spectrum.jpg?v=1778712861"},{"product_id":"cto-021","title":"CTO-021 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-021)\u003c\/h2\u003e\n\u003cp\u003eCTO-021 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 12.9% over 400-500 nm, 29.2% over 500-600 nm, 64.6% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 12.9% average transmission; the range is 9.9-29.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 29.2% average transmission; the range is 13.7-50% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 64.6% average transmission; the range is 50-73.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 600.0 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-021.html\" title=\"CTO-021 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-021\u003c\/h2\u003e\n\u003ch3\u003eHow does CTO-021 change the balance of blue and red light?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 12.9% over 400-500 nm; 29.2% over 500-600 nm; 64.6% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 600.0 nm mean for CTO-021?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-021, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ Full CTO","offer_id":48516667343103,"sku":"CTO-021","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-021-spectrum.jpg?v=1778712863"},{"product_id":"cto-018","title":"CTO-018 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-018)\u003c\/h2\u003e\n\u003cp\u003eCTO-018 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 27.3% over 400-500 nm, 50.6% over 500-600 nm, 92.2% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 27.3% average transmission; the range is 20.6-41.2% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 50.6% average transmission; the range is 23.1-86.4% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 92.2% average transmission; the range is 86.4-93.8% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 50% transmission:\u003c\/strong\u003e Approximately 553.1 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-018.html\" title=\"CTO-018 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-018\u003c\/h2\u003e\n\u003ch3\u003eHow much blue light does CTO-018 keep compared with red?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 27.3% over 400-500 nm; 50.6% over 500-600 nm; 92.2% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 50% crossing near 553.1 nm mean for CTO-018?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 50% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-018, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/4 CTO","offer_id":48516667408639,"sku":"CTO-018","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-018-spectrum.jpg?v=1778712863"},{"product_id":"cto-16","title":"CTO-16 Warming color-correction filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/color-temperature-orange-warming-filter\"\u003eColor Temperature Orange Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eWarming color-correction filter (CTO-16)\u003c\/h2\u003e\n\u003cp\u003eCTO-16 is a warming color-correction filter. It reduces blue-to-green light relative to longer visible wavelengths. This can give a suitable broadband light source a warmer balance. Average transmission in the sample is 25% over 400-500 nm, 47.1% over 500-600 nm, 88.6% over 600-700 nm. The resulting light output also depends on the lamp spectrum.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400-500 nm:\u003c\/strong\u003e Approximately 25% average transmission; the range is 21.8-37.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500-600 nm:\u003c\/strong\u003e Approximately 47.1% average transmission; the range is 26.8-73.9% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e600-700 nm:\u003c\/strong\u003e Approximately 88.6% average transmission; the range is 73.9-93.3% in the measured curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured edge at 60% transmission:\u003c\/strong\u003e Approximately 576.6 nm. Interpolated absolute-transmission crossing, checked against the factory summary. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage and architectural lighting:\u003c\/strong\u003e Try it when you need a warmer balance from a broadband white light source. Check the color and brightness with your actual light source before choosing a filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilm and photographic lighting:\u003c\/strong\u003e Consider it for warming a daylight or cool-white fixture toward another light in the scene. Measure the color match with the actual fixtures and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixture development:\u003c\/strong\u003e Use the measured color-shaping profile to compare available coatings. Confirm the required color temperature, tint, throughput and operating conditions on the assembled fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEvaluate the filter together with the intended light source. Color temperature, tint, color rendering and luminous output depend on that combination.\u003c\/li\u003e\n\u003cli\u003eTell us the size, shape and working angle you need, along with the temperature conditions inside the fixture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTO-16.html\" title=\"CTO-16 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about CTO-16\u003c\/h2\u003e\n\u003ch3\u003eWhat gives CTO-16 its warming effect?\u003c\/h3\u003e\n\u003cp\u003eThe sample averages are 25% over 400-500 nm; 47.1% over 500-600 nm; 88.6% over 600-700 nm. Compare those bands rather than treating the filter as a uniform dimmer: the relative transmission is what changes the light balance.\u003c\/p\u003e\n\u003ch3\u003eWhat does the 60% crossing near 576.6 nm mean for CTO-16?\u003c\/h3\u003e\n\u003cp\u003eIt identifies where this measured curve crosses 60% transmission. It is useful for comparing the spectral transition, but it does not give a fixed color-temperature shift or the total light output from your lamp. For CTO-16, use the band averages above together with your source spectrum.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Color Temperature Orange (Warming) Filter \/ 1\/2 CTO","offer_id":48516667441407,"sku":"CTO-16","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cto-16-spectrum.jpg?v=1778712864"},{"product_id":"mbp-a49","title":"MBP-A49 Dual-window short-wave infrared filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/multi-bandpass-filter\"\u003eMulti-Bandpass Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eDual-window short-wave infrared filter (MBP-A49)\u003c\/h2\u003e\n\u003cp\u003eMBP-A49 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 990-1140 nm; 1333-1579 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1800 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain band at half-peak transmission:\u003c\/strong\u003e Approximately 1324.1-1590 nm, giving a full width at half maximum (FWHM) of approximately 265.9 nm. This describes the main band only; other transmitted regions may remain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 990-1140 nm; 1333-1579 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-960 nm; 1170-1297 nm; 1625-1800 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 99.6% at 1475 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 800-965 nm:\u003c\/strong\u003e 0.703%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1185-1305 nm:\u003c\/strong\u003e 1.504%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1645-1800 nm:\u003c\/strong\u003e 0.384%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1010-1135 nm:\u003c\/strong\u003e 98.373%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1370-1570 nm:\u003c\/strong\u003e 98.983%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort-wave infrared material inspection:\u003c\/strong\u003e Consider the two transmitted regions for a source and infrared detector used in material-contrast experiments. Match the illumination and detector response to the confirmed band limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-wavelength sensing:\u003c\/strong\u003e Evaluate sharing one optic between signals in the two short-wave infrared regions. Use source modulation or separate detection paths if independent channel readings are required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectroscopy-window selection:\u003c\/strong\u003e Compare the transmitted windows with the actual feature and reference wavelengths required by the measurement. Confirm the intervening rejection before finalizing the optical design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional regions reach at least 50% transmission at approximately 983-1147 nm. Include these in the detector and blocking assessment.\u003c\/li\u003e\n\u003cli\u003eCheck the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.\u003c\/li\u003e\n\u003cli\u003eTell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/MBP-A49.html\" title=\"MBP-A49 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about MBP-A49\u003c\/h2\u003e\n\u003ch3\u003eWhere does MBP-A49 transmit at least 80% in the measured curve?\u003c\/h3\u003e\n\u003cp\u003eThe measured regions at or above 80% transmission are 990-1140 nm; 1333-1579 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.\u003c\/p\u003e\n\u003ch3\u003eCould MBP-A49 pass light outside its main band?\u003c\/h3\u003e\n\u003cp\u003eFor MBP-A49, additional regions reach at least 50% transmission at approximately 983-1147 nm. If your detector responds there, include that light in the background assessment or discuss an additional blocking requirement.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Multi-Bandpass Filter \/ 2-Band","offer_id":48516667474175,"sku":"MBP-A49","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/mbp-a49-spectrum.jpg?v=1778712865"},{"product_id":"mbp-a60","title":"MBP-A60 Red and near-infrared dual-window filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/multi-bandpass-filter\"\u003eMulti-Bandpass Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eRed and near-infrared dual-window filter (MBP-A60)\u003c\/h2\u003e\n\u003cp\u003eMBP-A60 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 610-701 nm; 829-914 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain band at half-peak transmission:\u003c\/strong\u003e Approximately 605.1-706.6 nm, giving a full width at half maximum (FWHM) of approximately 101.5 nm. This describes the main band only; other transmitted regions may remain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 610-701 nm; 829-914 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-371 nm; 375-596 nm; 720-809 nm; 947-1200 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 95.6% at 682 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 630-690 nm:\u003c\/strong\u003e 93.558%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 850-910 nm:\u003c\/strong\u003e 94.282%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed and near-infrared illuminated inspection:\u003c\/strong\u003e Consider a common optical path for red and near-infrared illumination. Match each source band to the confirmed spectrum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVegetation-reflectance experiments:\u003c\/strong\u003e Evaluate red and near-infrared reflectance measurements with independently distinguishable channels. The filter alone does not separate simultaneous signals for an index calculation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-source optical sensing:\u003c\/strong\u003e Consider alternating red and near-infrared sources through one transmission optic. Confirm source bandwidth, detector response and channel separation for your measurement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional regions reach at least 50% transmission at approximately 824-923 nm. Include these in the detector and blocking assessment.\u003c\/li\u003e\n\u003cli\u003eCheck the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.\u003c\/li\u003e\n\u003cli\u003eTell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/MBP-A60.html\" title=\"MBP-A60 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about MBP-A60\u003c\/h2\u003e\n\u003ch3\u003eWhat high-transmission regions should I compare for MBP-A60?\u003c\/h3\u003e\n\u003cp\u003eThe measured regions at or above 80% transmission are 610-701 nm; 829-914 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.\u003c\/p\u003e\n\u003ch3\u003eCould a broad-response detector see another band through MBP-A60?\u003c\/h3\u003e\n\u003cp\u003eFor MBP-A60, additional regions reach at least 50% transmission at approximately 824-923 nm. If your detector responds there, include that light in the background assessment or discuss an additional blocking requirement.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Multi-Bandpass Filter \/ 2-Band","offer_id":48516667506943,"sku":"MBP-A60","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/mbp-a60-spectrum.jpg?v=1778712866"},{"product_id":"mbp-a50","title":"MBP-A50 Ultraviolet, visible and near-infrared multiband filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/multi-bandpass-filter\"\u003eMulti-Bandpass Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eUltraviolet, visible and near-infrared multiband filter (MBP-A50)\u003c\/h2\u003e\n\u003cp\u003eMBP-A50 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 401-634 nm; 841-1200 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 401-634 nm; 841-1200 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-312 nm; 324-325 nm; 366-386 nm; 674-799 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 95.9% at 1160 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 410-610 nm:\u003c\/strong\u003e 93.842%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 700-780 nm:\u003c\/strong\u003e 0.962%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 870-1100 nm:\u003c\/strong\u003e 94.377%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-wavelength inspection:\u003c\/strong\u003e Consider retaining the measured visible and infrared regions in a common optical path. Match each illumination band and account for every transmitted region in the detector response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared-path sensing:\u003c\/strong\u003e Use alternating light sources or separate detectors if you need to measure each wavelength band independently. Multiple passbands alone do not give separate readings for each band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIllumination-profile development:\u003c\/strong\u003e Compare the transmitted and attenuated regions with the source spectrum. Include the additional UV or longer-wavelength transmission visible in the reference spectrum when relevant to the setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional regions reach at least 50% transmission at approximately 343-356 nm; 396-645 nm. Include these in the detector and blocking assessment.\u003c\/li\u003e\n\u003cli\u003eCheck the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.\u003c\/li\u003e\n\u003cli\u003eTell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/MBP-A50.html\" title=\"MBP-A50 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about MBP-A50\u003c\/h2\u003e\n\u003ch3\u003eWhich part of the spectrum is most useful when choosing MBP-A50?\u003c\/h3\u003e\n\u003cp\u003eThe measured regions at or above 80% transmission are 401-634 nm; 841-1200 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.\u003c\/p\u003e\n\u003ch3\u003eWhat should I check beyond the main transmission region of MBP-A50?\u003c\/h3\u003e\n\u003cp\u003eFor MBP-A50, additional regions reach at least 50% transmission at approximately 343-356 nm; 396-645 nm. If your detector responds there, include that light in the background assessment or discuss an additional blocking requirement.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Multi-Bandpass Filter \/ 3-Band","offer_id":48516667572479,"sku":"MBP-A50","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/mbp-a50-spectrum.jpg?v=1778712867"},{"product_id":"mbp-a48","title":"MBP-A48 Multi-region spectral filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/multi-bandpass-filter\"\u003eMulti-Bandpass Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMulti-region spectral filter (MBP-A48)\u003c\/h2\u003e\n\u003cp\u003eMBP-A48 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 466-706 nm; 846-921 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain band at half-peak transmission:\u003c\/strong\u003e Approximately 839.9-928.1 nm, giving a full width at half maximum (FWHM) of approximately 88.2 nm. This describes the main band only; other transmitted regions may remain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 466-706 nm; 846-921 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 300-451 nm; 734-821 nm; 946-1200 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 95.3% at 895 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 300-435 nm:\u003c\/strong\u003e 0.080%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 475-690 nm:\u003c\/strong\u003e 93.348%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 750-780 nm:\u003c\/strong\u003e 1.201%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 850-910 nm:\u003c\/strong\u003e 93.859%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 1000-1100 nm:\u003c\/strong\u003e 0.080%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-wavelength inspection:\u003c\/strong\u003e Consider retaining the measured visible and infrared regions in a common optical path. Match each illumination band and account for every transmitted region in the detector response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared-path sensing:\u003c\/strong\u003e Use alternating light sources or separate detectors if you need to measure each wavelength band independently. Multiple passbands alone do not give separate readings for each band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIllumination-profile development:\u003c\/strong\u003e Compare the transmitted and attenuated regions with the source spectrum. Include the additional UV or longer-wavelength transmission visible in the reference spectrum when relevant to the setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional regions reach at least 50% transmission at approximately 462-712 nm. Include these in the detector and blocking assessment.\u003c\/li\u003e\n\u003cli\u003eCheck the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.\u003c\/li\u003e\n\u003cli\u003eTell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/MBP-A48.html\" title=\"MBP-A48 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about MBP-A48\u003c\/h2\u003e\n\u003ch3\u003eWhat high-transmission regions should I compare for MBP-A48?\u003c\/h3\u003e\n\u003cp\u003eThe measured regions at or above 80% transmission are 466-706 nm; 846-921 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.\u003c\/p\u003e\n\u003ch3\u003eCould a broad-response detector see another band through MBP-A48?\u003c\/h3\u003e\n\u003cp\u003eFor MBP-A48, additional regions reach at least 50% transmission at approximately 462-712 nm. If your detector responds there, include that light in the background assessment or discuss an additional blocking requirement.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Multi-Bandpass Filter \/ 2-Band","offer_id":48516667638015,"sku":"MBP-A48","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/mbp-a48-spectrum.jpg?v=1778712867"},{"product_id":"mbp-a35","title":"MBP-A35 Multi-region spectral filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/multi-bandpass-filter\"\u003eMulti-Bandpass Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003cstyle\u003e\n.ko-reviewed{color:#222;font-family:inherit;line-height:1.65;overflow-wrap:anywhere}\n.ko-reviewed *{box-sizing:border-box}.ko-reviewed h2,.ko-reviewed h3{color:#005F96;line-height:1.3}\n.ko-reviewed h2{font-size:24px;margin:0 0 1rem}.ko-reviewed h3{font-size:19px;margin:1.7rem 0 .65rem}\n.ko-reviewed p{margin:.6rem 0 1rem}.ko-reviewed ul{padding-left:1.25rem;margin:.6rem 0 1rem}\n.ko-reviewed li{padding-left:.15rem;margin:.55rem 0}.ko-reviewed .ko-note{border-left:3px solid #c9dae4;padding:.65rem 1rem;background:#f7fafc;font-size:.95em}\n.ko-reviewed a{color:#005F96;text-decoration:underline}\n\n@media(max-width:480px){.ko-reviewed h2{font-size:22px}.ko-reviewed h3{font-size:18px}.ko-reviewed .ko-note{padding:.65rem .8rem}}\n\u003c\/style\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eMulti-region spectral filter (MBP-A35)\u003c\/h2\u003e\n\u003cp\u003eMBP-A35 is a multi-region spectral filter. The reference spectrum shows multiple high-transmission regions at approximately 541-559 nm; 644-671 nm; 827-871 nm. Light from these bands passes through the same optic. Check every band against your light source and detector. To measure the bands separately, use alternating light sources or separate detection paths.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 300-1200 nm. Performance outside this measured interval is not established by this curve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain band at half-peak transmission:\u003c\/strong\u003e Approximately 820.2-881.8 nm, giving a full width at half maximum (FWHM) of approximately 61.6 nm. This describes the main band only; other transmitted regions may remain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or above 80% transmission:\u003c\/strong\u003e 541-559 nm; 644-671 nm; 827-871 nm. Approximate measured intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelected regions at or below 5% transmission:\u003c\/strong\u003e 321-524 nm; 573-631 nm; 693-806 nm; 903-1082 nm. Measured sample intervals; confirm the required blocking for your order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 96.5% at 845 nm. Peak wavelength is not the same as a defined centre wavelength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 350-520 nm:\u003c\/strong\u003e 0.191%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 540-560 nm:\u003c\/strong\u003e 86.079%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 580-630 nm:\u003c\/strong\u003e 1.132%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 650-670 nm:\u003c\/strong\u003e 89.591%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 690-810 nm:\u003c\/strong\u003e 1.081%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 830-870 nm:\u003c\/strong\u003e 90.897%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAverage measured transmission, 890-1050 nm:\u003c\/strong\u003e 1.939%. Calculated from the factory sample data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e We can customize stock and sample-book designs. Tell us the wavelength response, size and operating conditions you need.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values come from the measured samples and help you choose a starting design. We will agree the final specification for your order. Custom versions have their own specifications and measured curves.\u003c\/p\u003e\n\u003ch3\u003eApplications to consider\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-wavelength inspection:\u003c\/strong\u003e Consider retaining the measured visible and infrared regions in a common optical path. Match each illumination band and account for every transmitted region in the detector response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShared-path sensing:\u003c\/strong\u003e Use alternating light sources or separate detectors if you need to measure each wavelength band independently. Multiple passbands alone do not give separate readings for each band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIllumination-profile development:\u003c\/strong\u003e Compare the transmitted and attenuated regions with the source spectrum. Include the additional UV or longer-wavelength transmission visible in the reference spectrum when relevant to the setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional regions reach at least 50% transmission at approximately 534-563 nm; 640-680 nm. Include these in the detector and blocking assessment.\u003c\/li\u003e\n\u003cli\u003eCheck the full wavelength range of your light source, the wavelengths your detector responds to, and how much unwanted light you need to block. Use the full curve when choosing a filter; the product code and peak do not tell the whole story.\u003c\/li\u003e\n\u003cli\u003eTell us the angle at which light reaches the filter and whether the beam is parallel or converging. For demanding rejection or high-power use, confirm the required blocking and power-handling specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eStart with this stock or sample-book design, then tell us what you need to change. We can discuss the wavelength bands, transmission, blocking, angle, glass material, size and operating conditions with you, and agree a specification for your custom filter.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/MBP-A35.html\" title=\"MBP-A35 transmission spectrum with wavelength readout\" loading=\"lazy\" width=\"100%\" height=\"880\" style=\"border:0;width:100%;height:clamp(640px,calc(43vw + 320px),880px);\" referrerpolicy=\"no-referrer-when-downgrade\"\u003e\u003c\/iframe\u003e\u003csection class=\"ko-reviewed ko-product-faq\" aria-label=\"Product questions\"\u003e\u003ch2\u003eQuestions about MBP-A35\u003c\/h2\u003e\n\u003ch3\u003eWhich part of the spectrum is most useful when choosing MBP-A35?\u003c\/h3\u003e\n\u003cp\u003eThe measured regions at or above 80% transmission are 541-559 nm; 644-671 nm; 827-871 nm. They are measured intervals, not guaranteed passband tolerances. Compare the full curve with the signal wavelengths you need to retain.\u003c\/p\u003e\n\u003ch3\u003eWhat should I check beyond the main transmission region of MBP-A35?\u003c\/h3\u003e\n\u003cp\u003eFor MBP-A35, additional regions reach at least 50% transmission at approximately 534-563 nm; 640-680 nm. If your detector responds there, include that light in the background assessment or discuss an additional blocking requirement.\u003c\/p\u003e\u003c\/section\u003e\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eDiscuss this filter with KUPO\u003c\/strong\u003e\u003c\/a\u003e - include the product reference, source wavelength, working angle and required dimensions.\u003c\/p\u003e\u003cstyle\u003e#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:27px;font-weight:500;line-height:1.4;letter-spacing:-.01em;color:#0c324b;background:#f0f6f9;padding:20px 24px;}#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title+p{border-bottom:0;}@media(max-width:650px){#MainContent .ko-reviewed\u003eh2.ko-catalog-description-title{font-size:24px;}}\u003c\/style\u003e","brand":"KUPO Optics","offers":[{"title":"Multi-Bandpass Filter \/ 3-Band","offer_id":48516667670783,"sku":"MBP-A35","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/mbp-a35-spectrum.jpg?v=1778712869"}],"url":"https:\/\/kupooptics.com\/collections\/all-products.oembed","provider":"KUPO Optics","version":"1.0","type":"link"}