Infrared filter is mainly used in the field of security monitoring, infrared gas analyzer, night vision products, infrared detectors, infrared receivers, infrared sensing, infrared communication products. Specific to the products such as: surveillance camera, remote control, infrared curtain wall products, infrared sensor toilet, faucet, hand sanitizer device, infrared thermometer, infrared printer, interactive electronic whiteboard, infrared touch screen, fingerprint recognizer, etc.

Infrared filter, filter out infrared namely: color can also be induction infrared surveillance camera CCD, is because of induction infrared lead D.S.P can't calculate the true colors, and so must add a filter, the light in the infrared part is separated, so only color CCD need to pack filter, black and white are: no dressing into the light Because the surveillance cameras are each CCD photosensitive body (CELL), the light is point-blank come in, but for fear of interference to adjacent photoreceptor, will need to be finishing to the light, so that filter is not glass, but quartz plate, using physical polarization characteristics of quartz, the incoming light, keep direct part, reflection up some of the oblique, avoid to affect next to the point.