IR Cut Filter 

Infrared cut-off filters are designed to block or reflect infrared wavelengths but pass visible light. Mid-infrared filters are often used as heat-absorbing filters in devices with bright incandescent light bulbs (such as slide and overhead projectors) to prevent unwanted heating due to infrared radiation. There are also filters which are used in solid state video cameras to block IR due to the high sensitivity of many camera sensors to unwanted near-infrared light.

It is also called infrared blocking filter,which is applied in the CCD/COMS to allow visible light through and reflect or stop infrared light at the same time.It is still widely used in digital telephone, CCTV, PC camera system, picture-tel, digital camera, and cell phone camera etc .Generally  infrared filter is used for infrared blocked coating on high quality optical glass substrate, which can effectively restrain wave oscillatigenerally on caused by near infrared light to make the image more clear,and stable.

Technical parameters