Solution:
It cannot be seen directly by the naked eye, and there is no need to worry about any impact on human eyes (or pets), etc.
Light is an electromagnetic wave, and its wavelength ranges from a few nanometers to about a millimeter;
What the human eye can see is only a part of it, which is called visible light. The wavelength of visible light is divided into red, orange, yellow, green, blue, blue, and violet from long to short. Among them, the wavelength longer than red light is called infrared light;
Most cameras use an infrared tube with a wavelength of 940nm. This infrared tube has the characteristics of low radiation and strong concealment, so in the night vision mode of the camera, the infrared light will not emit dazzling red light (the infrared light is invisible to the naked eye. ), and you can see the monitoring of the dark environment clearly;
The schematic diagram of the infrared night vision light is as follows:
Tip:
Use the camera of the mobile phone to aim at the infrared camera. Assuming that the camera of the mobile phone has no filter, the infrared night vision light of the camera can be photographed (as shown above).