Night Vision - Night Outer Sight
The nighttime external sight with the image intensifier as the core device does not use the infrared searchlight to illuminate the target, but uses the reflected light from the target under the weak light to be enhanced by the image intensifier on the fluorescent screen as a visible image that can be perceived by the human eye to observe and aim. Target. Infrared night vision device is a military night vision device using photoelectric conversion technology. It is divided into active type and passive type: the former uses an infrared searchlight to illuminate the target and receives the reflected infrared radiation to form an image; the latter does not emit infrared rays and relies on the infrared radiation of the target itself to form a "thermal image", so it is also called "thermal image". instrument".
