{"product_id":"bms-003","title":"BMS-003 650 nm reflecting beam splitter","description":"\u003cnav aria-label=\"Product family\"\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products\"\u003eAll optics\u003c\/a\u003e \/ \u003ca href=\"\/collections\/beam-splitters\"\u003eBeam Splitters\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\"\u003e650 nm reflecting beam splitter (BMS-003)\u003c\/h2\u003e\n\u003cp\u003eBMS-003 is a beam splitter for a reflected red-light path. The factory describes a nominal 650 nm design for use at a 45-degree angle. The supplied curve measures reflected light; ask us to confirm the transmitted light separately.\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 reflectance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasured reflectance at 650 nm:\u003c\/strong\u003e 89.098%. This is reflected light, not transmitted light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory design designation:\u003c\/strong\u003e 650 nm, 45 degrees, nominal reflectance 90% +\/-3%. Factory design target; confirm the final specification for your order.\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-light beam routing:\u003c\/strong\u003e Evaluate the reflected path around 650 nm for illumination or instrument integration. Match the source bandwidth and optical geometry to the required response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical monitoring:\u003c\/strong\u003e Discuss a reflected signal and a separately specified transmitted path for the intended source and detector.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoosing this filter\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eConfirm both reflected and transmitted paths, polarization and working angle. Reflectance alone does not determine transmission.\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\u003eReflectance spectrum\u003c\/h3\u003e\u003ciframe src=\"https:\/\/charts.kupooptics.com\/BMS-003.html\" title=\"BMS-003 reflectance 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 BMS-003\u003c\/h2\u003e\n\u003ch3\u003eDoes the 89.098% reading at 650 nm mean transmission?\u003c\/h3\u003e\n\u003cp\u003eIt means reflectance: that fraction of the measured 650 nm light is reflected by the measured sample. BMS-003 is intended for a reflected red-light path; the chart does not establish the transmission of the other path.\u003c\/p\u003e\n\u003ch3\u003eCan I install BMS-003 at a different angle from 45 degrees?\u003c\/h3\u003e\n\u003cp\u003eThe factory identifies this as a 45-degree design. If your layout uses another angle, tell us the beam geometry and polarization before selecting it. The supplied curve does not establish the response at other angles.\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":"Beam Splitter","offer_id":48516667965695,"sku":"BMS-003","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0818\/8651\/1359\/files\/bms-003-reviewed-reflectance_8472f93d-90c8-40c6-88cf-d874ae705abb.png?v=1788660903","url":"https:\/\/kupooptics.com\/products\/bms-003","provider":"KUPO Optics","version":"1.0","type":"link"}