We offer two types of absorptive filters: IRC20 and IRC21 and two types of reflective IR filters: IRC30 and IRC40 which is a new type of reflective filter suitable for day/night security cameras.  It allows both visible and infrared LED light to pass through.  The absorptive filters are recommended for CCD imagers while the reflective CMOS imagers.  Our standard off-the-shelf filters are listed blow. If you need a custom filter, please contact our support.

Ir pass filterfor camera

Infrared (IR) cut-off filters are used with color CCD or CMOS imagers to produce accurate 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 short-pass interference filters that reflect infrared light with high efficiency.