{"product_id":"mid-bi940-27","title":"Bi940-27 | Bi940 Near-IR Interference Bandpass Filter","description":"\u003cdiv style=\"margin-bottom: 20px;\"\u003e\u003cdiv style=\"line-height: 1.6; color: #333;\"\u003e\u003cdiv\u003e\n\u003cp\u003eThe MidOpt Bi940-27 filter is meant for use with IR LED or laser diode illuminators that operate at or very close to 940nm. Bi940 filters feature a much narrower band design than BN940, which can be beneficial in situations where ambient light might otherwise create poor contrast. These are frequently night vision, security, traffic control, LPR, and industrial inspection applications.\u003cbr\u003e\u003cbr\u003eNIR image sensors used in conjunction with 940nm illumination are also being used to support iris recognition in biometrics. When used as a secondary scanner (simultaneously with a primary, mobile scanning unit), the invisible 940nm band can similarly help improve finger-vein identification protocols. This technology identifies specific individuals using a distinct blood vessel pattern inside one’s hand. Use of a narrow-band Bi940 filter can provide insurance against unanticipated changes in ambient\/background light. One application under development is to verify users for payment transactions instead of relying on a credit card.\u003c\/p\u003e\n\u003cp\u003eAll MidOpt filters can also be purchased unmounted or in custom dimensions upon request from Machine Vision Direct.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\u003cdiv style=\"margin-top: 20px;\"\u003e\n\u003ch3 class=\"card__title heading h3\"\u003eTechnical Specifications\u003c\/h3\u003e\n    \u003cdiv class=\"collapsible-section\" style=\"margin: 20px 0; border: 1px solid #e0e0e0; border-radius: 5px; overflow: hidden;\"\u003e\n      \u003cbutton class=\"collapsible-toggle\" data-target=\"section-techspec-specifications-1778525042341-v5hej\" type=\"button\" style=\"width: 100%; padding: 15px 20px; background-color: #f8f9fa; border: none; cursor: pointer; text-align: left; font-size: 16px; font-weight: 600; color: #333; display: flex; justify-content: space-between; align-items: center; transition: background-color 0.3s;\" onmouseover=\"this.style.backgroundColor='#e9ecef'\" onmouseout=\"this.style.backgroundColor='#f8f9fa'\" onclick=\"\n          const content = document.getElementById('section-techspec-specifications-1778525042341-v5hej');\n          const icon = this.querySelector('.toggle-icon');\n          if (content.style.display === 'none' || content.style.display === '') {\n            content.style.display = 'block';\n            icon.textContent = '−';\n          } else {\n            content.style.display = 'none';\n            icon.textContent = '+';\n          }\n        \"\u003e\n        \u003cspan\u003eSpecifications\u003c\/span\u003e\n        \u003cspan class=\"toggle-icon\" style=\"font-size: 20px; font-weight: bold; color: #666;\"\u003e+\u003c\/span\u003e\n      \u003c\/button\u003e\n      \u003cdiv id=\"section-techspec-specifications-1778525042341-v5hej\" class=\"collapsible-content\" style=\"display: none; padding: 0 20px 20px 20px; background-color: #fff;\"\u003e\n        \u003ctable width=\"100%\"\u003e\u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eUseful Range Min\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e930 nm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eUseful Range Max\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e952 nm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eStabledge\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eNo\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eAdhesive Backed\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eYes\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eTolerance\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e5 %\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003ePeak Transmission\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e≤ 85 %\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eSurface Quality (Scratch-Dig)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e40-20\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eSubstrate Material\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eClear Glass\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eFilter Diameter\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eM27 x P0.5\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \n    \u003cdiv class=\"collapsible-section\" style=\"margin: 20px 0; border: 1px solid #e0e0e0; border-radius: 5px; overflow: hidden;\"\u003e\n      \u003cbutton class=\"collapsible-toggle\" data-target=\"section-techspec-product-availability-1778525042341-oydby\" type=\"button\" style=\"width: 100%; padding: 15px 20px; background-color: #f8f9fa; border: none; cursor: pointer; text-align: left; font-size: 16px; font-weight: 600; color: #333; display: flex; justify-content: space-between; align-items: center; transition: background-color 0.3s;\" onmouseover=\"this.style.backgroundColor='#e9ecef'\" onmouseout=\"this.style.backgroundColor='#f8f9fa'\" onclick=\"\n          const content = document.getElementById('section-techspec-product-availability-1778525042341-oydby');\n          const icon = this.querySelector('.toggle-icon');\n          if (content.style.display === 'none' || content.style.display === '') {\n            content.style.display = 'block';\n            icon.textContent = '−';\n          } else {\n            content.style.display = 'none';\n            icon.textContent = '+';\n          }\n        \"\u003e\n        \u003cspan\u003eProduct Availability\u003c\/span\u003e\n        \u003cspan class=\"toggle-icon\" style=\"font-size: 20px; font-weight: bold; color: #666;\"\u003e+\u003c\/span\u003e\n      \u003c\/button\u003e\n      \u003cdiv id=\"section-techspec-product-availability-1778525042341-oydby\" class=\"collapsible-content\" style=\"display: none; padding: 0 20px 20px 20px; background-color: #fff;\"\u003e\n        \u003ctable width=\"100%\"\u003e\u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eStandard Lead Time\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e15 Days\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eStock Location\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eBuilt to Order\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eProduct Lifecycle\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eActive\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e","brand":"Midwest Optical Systems","offers":[{"title":"Default Title","offer_id":47481980158210,"sku":"MID Bi940-27","price":228.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1297\/4177\/files\/314bf1c27d1199c421248f8f3266ed3e_dc351438-a70a-40e5-9ac5-fded34834d58.jpg?v=1778525046","url":"https:\/\/machinevisiondirect.com\/products\/mid-bi940-27","provider":"Machine Vision Direct","version":"1.0","type":"link"}