Night vision cameras are mainly used in environments without visible light to project infrared emission devices onto objects using infrared light, which is reflected by the object and enters the lens for imaging. The main components of night vision cameras are infrared light panels. After being powered on, the current is transmitted to the infrared lamp core through the PCB circuit board, which can convert electrical energy into light and heat energy. The infrared lamp emits infrared light and projects it onto the object. 2. Lens. 3. Sensitive switch. 4. Camera motherboard. 5. Camera housing. Infrared lights have wavelengths of 850 and 940nm, and the different wavelengths determine the illumination distance and effect of infrared lights: 1. Although 850nm infrared lights have good illumination distance effect, they can cause red violence. 2. The 940nm infrared lamp has almost no red phenomenon or red phenomenon. The main reason for using 850nm infrared emission tubes in the market is that the same camera has a sensitivity of 10 times higher at 850nm wavelength than at 940nm wavelength, with higher emission power and longer emission distance. In contrast, 850nm is a mild type of infrared.