Infrared light, also called infrared light, was discovered by a British scientist. In 1800, when he studied sunlight, he made light split into colored light bands through a prism. He used a thermometer to measure the heat contained in different colors in the light band. During the test, he stumbled upon a strange phenomenon: a thermometer placed outside the red light of the light, higher than the other temperature in the room.
The structure mainly includes photodetectors, optical systems, signal amplifiers, signal processing, display The output is composed of parts.