How does the night vision function? differences in night vision
Night vision technology is a photoelectric technology that realizes night observation by means of photoelectric 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 a photoelectric imaging technology that uses night vision goggles with image intensification tubes to enhance the weak target image illuminated by night skylight for observation. Low-light night vision device is currently the night vision equipment with the largest production volume and equipment in foreign countries and the most widely used. It can be divided into direct observation (such as night vision observer, weapon sight, night driving device, night vision glasses) and indirect observation. Observation (such as low-light television) 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. 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 each part of the target. Its equipment is a thermal imager. Thermal imagers have unique advantages that are different from other night vision devices, such as being able to work in fog, rain, and snow, having a long range of action, being able to identify camouflage and anti-interference, etc., which have become the focus of the development of foreign night vision equipment, and Will replace the low-light night vision device to a certain extent.
How does night vision work?
Night vision technology includes two main types: amplifying light (or enhancing weak light) and infrared detection (or heat detection). Most consumer night vision devices are products that amplify the light. All ATN night vision technology products use magnified light. The process uses small amounts of light, such as the dim light in the surrounding environment (such as moonlight or starlight), to convert light energy (called photons by scientists) into electrical energy (that is, electrons). These electrons pass through a thin disc, about 1/4 inch in size, containing more than 10 million pathways. When an electron travels through a channel, thousands of electrons are knocked off the channel walls. These multiplied electrons are then upconverted back to photons and allow you to see a bright nighttime image even though it's dark.
