{"product_id":"cm-740","title":"CM-740 Cold Mirror Filter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/cold-mirror-longpass-filters\"\u003eCold Mirror Filters\u003c\/a\u003e\u003c\/p\u003e\u003c\/nav\u003e\u003csection class=\"ko-reviewed\"\u003e\u003ch2 class=\"ko-catalog-description-title\"\u003eCM-740 Reference Optical Response\u003c\/h2\u003e\n\u003cp\u003eCM-740 is a near-infrared transmitting cold-mirror reference design. This listing follows the original BH-A07(COLD MIRROR740) reference.\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 interval is not established.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak transmission:\u003c\/strong\u003e Approximately 97.915% at 884 nm. This is a sample measurement, not an order tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelection note:\u003c\/strong\u003e The measured absolute 50% transmission edge is approximately 739.07 nm. Confirm the supplied version; the A+B-labelled measurement is a separate reference.\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\/CM-740.html\" title=\"CM-740 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 CM-740\u003c\/h2\u003e\n\u003ch3\u003eWhat does the measured peak of CM-740 represent?\u003c\/h3\u003e\n\u003cp\u003eThe measured peak is approximately 97.915% at 884 nm. That is the highest measured transmission point, not automatically a defined centre wavelength or a passband specification. Use the surrounding curve to judge the signal range.\u003c\/p\u003e\n\u003ch3\u003eWhich CM-740 version does this page describe?\u003c\/h3\u003e\n\u003cp\u003eIt uses the original BH-A07(COLD MIRROR740) reference. The separate COLD MIRROR740-A+B factory file is an alternative version, not an automatic replacement. Include your sample label or previous order reference when asking us to match an existing filter.\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":"Cold Mirror Longpass Filter \/ Near-Infrared \/ Standard (\u003e20nm)","offer_id":48516670587135,"sku":"CM-740","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/cm-740-spectrum.jpg?v=1778712933","url":"https:\/\/kupooptics.com\/products\/cm-740","provider":"KUPO Optics","version":"1.0","type":"link"}