Inside the camera CCD or CMOS use day and night filter cause the camera image partial color in the daytime, night vision low illumination effect is poor, so day and night filter can't meet the current CCTV surveillance industry application of high-definition digital products, when the camera is color, it will automatically use the pulse signal to make the switch move to IR CUT filter, taken out such the camera image near the object of primary colors, nature. when the camera is night vision, it use the pulse signal to make the switch move to the AR filter once again, this image sensors can be induced to the all wavelength of the light, so that the camera is better image brightness and resolution, was made objects easier to identify.