The material of infrared fill light lamp is mainly divided into two kinds: LED light emitting diode and laser infrared lamp. LED lights are cost-effective, suitable for close use, the distance is about 150 meters; The laser infrared lamp shines farther, can reach more than 200 to 2,000 meters, but its irradiation Angle is relatively small.
The working principle of infrared fill light is not complicated. The infrared light emitting diode (LED) matrix is mainly composed of luminous bodies, and the current is injected into the PN junction by positive bias to excite infrared light. In order to reduce the impact of the working state transition and extend the service life, the light control soft switch circuit is used for infrared lamp. In order to compensate the difference of infrared radiation power between winter and summer, the voltage and constant current circuit is also used to make the infrared LED light power stable.