Night vision goggles are auxiliary observation tools based on night vision technology and with the help of photoelectric imagers. There are three types of night vision goggles, one is low-light night vision goggles, the other is infrared night vision goggles, and car driving night vision goggles.
Low-light night vision devices are being widely equipped with troops abroad. It is divided into two types enhanced low-light night vision technology (direct observation) and low-light TV (indirect observation).
Features
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 a photoelectric imaging technology that enhances the weak target image illuminated by night skylight for observation through night-vision goggles with an image intensifier tube. 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, 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.
Classification
Low-light night vision goggles amplify the weak light to present a clear picture in the line of sight. Therefore, in the absence of light at all, low-light night vision goggles cannot see anything.
Infrared night vision goggles are divided into two types, one is active and the other is passive. Active is when the night vision goggles emit a beam of infrared rays, which is reflected on the object and then reflected back, which is equivalent to a flashlight; the passive type is The infrared light emitted by the object itself amplified and converted into visible light. Therefore, if there is no infrared source (most things that can generate heat can be infrared sources, such as living things, vehicles, flames, etc.), passive infrared night vision goggles can not see things.
Active infrared night vision goggles can see in any situation. Different night vision goggles have different applicable occasions. Low-light night vision goggles are suitable for use when there is starlight or moonlight in the wild.
Because the night vision goggles only show a single color, and their display is green (you can notice many gauges have green displays), you're seeing green.
