Night vision device - see the night clearly

Night vision goggles, that is, night vision devices, are used to enhance people's eyesight in extremely low light conditions. There are several types of night vision goggles. Infrared imaging systems are also known as "active" night vision devices. It focuses infrared light on a scene. Infrared light exceeds the visible spectrum range of human beings. Therefore, the beam itself cannot detectible image conversion technology converts infrared lighting scenes into visible light images. Thermal imaging systems work in a similar way, converting heat patterns emitted by objects, people or animals into visual images.

Commercial night vision systems, known as "passive" night vision systems, are magnified into visible images received under minimal light (such as starlight).

The field of vision through the passive night vision device may be 20,000 to 50,000 times brighter than that can be seen with the naked eye.