Optical and electrical technology for night vision
A tool for observing at night in complete darkness or with dim light, night vision devices—also known as night vision glasses, night vision binoculars, and infrared binoculars—were first utilized in military operations. Later, it is extensively employed in industries such as criminal investigation, safety protection, preventing forest fires, inspecting power and communication lines, construction sites, farms, farm care, even tourism. Since they have been created for 50 years, night vision equipment can be loosely categorized into the following categories:
1. Image intensification technology, sometimes referred to as low-light night vision technology, is a photoelectric imaging technique that increases the target image while observing through night vision goggles equipped with image intensifier tubes. The night vision equipment with the highest manufacturing volume and the greatest international application right now is low-light equipment. Direct observation and indirect observation are the two categories that it falls under.
2. Infrared night vision technology is divided into active and passive. 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. The corresponding equipment is an active infrared night vision device. Although the active infrared night vision technology has the characteristics of clear imaging and simple production, it also has a fatal weakness: on the battlefield, the infrared light of the infrared light will be detected by the enemy's infrared detection device. This weakness undoubtedly declared the fate of active infrared night vision technology to be eliminated. Passive infrared night vision technology is an infrared technology that realizes observation by means of infrared radiation emitted by the target itself. Simply put, it is to image according to different temperatures. The resolution is very low, but it has its special purpose.
