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800NM and 825nm IR Longpass Filter, cold mirrors
Cold Mirror, IR Longpass Filter
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800NM and 825nm IR Longpass Filter, cold mirrors

T>90% @ 850-1100nm, T=50% @ 825nm
Rave>97% @ 400-800nm
customized, from 2x2mm to Dia. 110mm, +/-0.1mm
Surface quality:
Clear aperture:
>90%, or full surface coatings
vary customized, such as B270, BK7, crystal, float or sodalime glass etc.
High transmission of IR light, and high reflection of visible light.
Cutoff all visible light before 780nm to reduce the image noise
Cold mirror, a type of NIR Longpass filter which only transmit the NIR light, but reflect all the visible light spectrum, is commonly used for optical imaging systems that only require NIR light to form the black and white image. Compared to the NIR Black Color glass, cold mirrors are of a reflective mirror appearance. Because more and more applications require the NIR image forming function, LenOpTec have developed a series of cold mirrors for vary demand, such as 705nm cold mirror, 800nm and 825nm cold mirrors. Applications include but not limited to, biomedical identification, biochemistry analysis, video surveillance system, NIR detector and other NIR optical systems.

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