Night vision technology is an optoelectronic technology that realizes night observation by means of optoelectronic imaging devices. Night vision technology includes low-light night vision and infrared night vision. Low-light night vision technology, also known as image enhancement technology, is an optoelectronic imaging technology that enhances the weak target image illuminated by night sky light through night vision goggles with an image intensifier tube for observation.

Low-light night vision devices are the night vision devices with the largest and most widely used foreign production and equipment. They can be divided into direct observation (such as night vision observers, weapon sights, night pilots, night vision glasses) and indirect Observation (such as low-light TV) two. Infrared night vision technology is divided into active infrared night vision technology and passive infrared night vision technology.

Active infrared night vision technology is a night vision technology that implements observation by actively illuminating and using the infrared light reflected by the target to reflect the infrared source, and the corresponding equipment is an active infrared night vision device.

Passive infrared night vision technology is an infrared technology that realizes observation by means of infrared radiation emitted by the target itself. It finds the target according to the temperature difference or thermal radiation difference between the target and the background or various parts of the target. It is equipped with a thermal imager. Thermal imagers have unique advantages different from other night vision devices, such as the ability to work in fog, rain, and snow, long distances, camouflage recognition and anti-interference, etc., and have become the focus of foreign night vision equipment development. It will replace the low-light night vision device to a certain extent.