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Double Bandpass filters are designed with 2 area transmission, while all other spectrums blocked or reflected. Usually, one area is of visible light and the other NIR light. Different areas could be designed for vary equipments or applications, such as 620+890nm, 630+890nm and 650+940nm type.
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Specifications:
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Centre Wavelength(CWL):
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490nm and 660nm, TOL +/-3nm
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FWHM(50% point):
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490+/-30nm, 660+/-20nm
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Transmission:
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T>86% at CWL=490nm and 660nm
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Size:
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customized, from 2x2mm to Dia. 110mm, +/-0.1mm
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Thickness:
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0.3~3mm
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Surface quality:
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60/40~20/40
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Clear aperture:
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>90%, or full surface coatings
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Substrate:
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vary customized, such as B270, BK7, sodalime glass etc.
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¡ñ High transmission at the CWL, from 80% ~ 95% according to the bandwidth.
¡ñ High blocked rate at OD4
¡ñ Precise point of the CWL
¡ñ Singlet substrate with coatings |
