Infrared (IR) cut-off filters are used with color CCD or CMOS imagers to produce true color images. An IR cut-off filter blocks the transmission of the infrared while passing the visible.The frequently used Specifications are as below: Material Float glass, B270, BK7 or other Dimension Tolerance +0.0/-0.1mm Thickness 0.3, 0.5, 0.7 and 1.1mm or other Surface Quality 60/40 or better Clear Aperture >90% Coating 1 400nm-620nm Tavg>92% Coating 2 400nm-620nm Tavg>94% Coating 3 400nm-600nm Tavg>92% Coating 4 400nm-620nm Tavg>90%
400nm-620nm Tmin>85%
645±10 nm T=50%
700nm-1100nm Tavg<1.5%
700nm-1100nm Tmax<3%
400nm-620nm Tmin>90%
650±10 nm T=50%
700nm-1100nm Tavg<1.5%
700nm-1100nm Tmax<3%
400nm-600nm Tmin>85%
630±10 nm T=50%
650nm-750nm Tmax<1.5%
830±10 nm T=50%
865±10 nm T=50%
850±10 nm T>85%
900nm-1100nm Tavg<1.5%
900nm-1100nm Tmax<3%
400nm-620nm Tmin>83%
650±10 nm T=50%
910±10 nm T=50%
960±10 nm T=50%
940±10 nm T>85%
1000nm-1100nm Tmax<3.5%
Other types are available upon request.
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