{"product_id":"ctb-002","title":"CTB-002 Cooling 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-blue-cooling-filter\"\u003eColor Temperature Blue Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eCTB-002 Reference Optical Response\u003c\/h2\u003e\n\u003cp\u003eCTB-002 is a cooling color-correction filter referenced to the customer sample book. Evaluate the correction with the spectrum of your actual light source.\u003c\/p\u003e\n\u003ch3\u003eOptical performance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured wavelength range:\u003c\/strong\u003e 380-780 nm. Performance outside this interval is not established.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 86.040% at 435 nm. This is a sample measurement, not an order tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelection note:\u003c\/strong\u003e The customer sample-book curve is the reference for this listing. Confirm that your sample-book edition and order refer to the same design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ko-note\"\u003eThese values describe a measured measured sample. Custom versions and production orders have their own agreed specifications.\u003c\/p\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cp\u003eCompare the full source spectrum and desired transmitted region. Tell us the working angle, dimensions and required rejection.\u003c\/p\u003e\n\u003ch3\u003eCustom options\u003c\/h3\u003e\n\u003cp\u003eDiscuss the wavelength response, substrate, dimensions and operating conditions with KUPO.\u003c\/p\u003e\u003c\/section\u003e\u003ch3\u003eTransmission spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/CTB-002.html\" title=\"CTB-002 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 CTB-002\u003c\/h2\u003e\n\u003ch3\u003eWhy does this CTB-002 listing use the sample-book curve?\u003c\/h3\u003e\n\u003cp\u003eThis listing follows the customer sample-book reference over 380-780 nm. Its measured peak is 86.040% at 435 nm. If your factory sheet looks different, send us the edition or label rather than assuming the curves describe the same version.\u003c\/p\u003e\n\u003ch3\u003eCan I choose CTB-002 from its peak transmission alone?\u003c\/h3\u003e\n\u003cp\u003eThe sample peak of 86.040% at 435 nm is only one point on the curve. Compare the complete sample-book spectrum with your actual lamp: the balance of blue, green and red light determines the correction. Share your source spectrum and target color balance with us.\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 Blue (Cooling) Filter \/ 3\/4 CTB","offer_id":48516672028927,"sku":"CTB-002","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/ctb-002-spectrum.jpg?v=1778712965","url":"https:\/\/kupooptics.com\/products\/ctb-002","provider":"KUPO Optics","version":"1.0","type":"link"}