Optical filter Sunex

IR Cutoff Filters and Optical Low Pass Filter for use with CMOS/CCD Sensors. These filters can be modified to meet your specifications.

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. This can be done with two optical techniques: absorption or reflection. Absorptive filters are made with special optical glass that absorbs near infrared radiation. Reflection type filters are essentially short-pass interference filters that reflect infrared light with high efficiency. We offer two types of absorptive filters: IRC20 and IRC21. The standard reflection type (IRC30) filter offers cut-off wavelength at 640nm (+/-10nm). Other cut-off wavelength can be selected for custom orders. IRC20 type is recommended for CCD imagers while IRC21 and IRC30 are more suited for CMOS imagers. The standard sizes are listed below. Other sizes can be custom ordered.

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