Infrared night vision devices are divided into active and passive types. What is the difference between the two
Active night vision system: It uses near-infrared light as a light source to illuminate targets, such as infrared LEDs, infrared lamps, and near-infrared lasers; An active infrared night vision device is a type of night vision device that uses a low illumination camera or low light level camera to receive the infrared light reflected by the target, convert it into a video signal, and synchronously display the image on the monitor's fluorescent screen.
Passive night vision systems: There are two types of night vision systems. One type utilizes all very weak natural light such as moonlight, starlight, and night sky light to amplify and enhance visibility. These types of night vision systems are also known as low light level night vision systems. Another type is to use far-infrared sensitive detectors to detect the thermal radiation of the target itself, which is also known as thermal imagers.
What are the types of night vision devices?
Observation glasses - Observation glasses are generally handheld and can also be installed on weapons, using a single barrel (one eye) mirror body. Due to the fact that the observation lens is a handheld device that is not worn like an eyepiece, it is more suitable when you want to observe a specific target in detail and then return to normal observation conditions.
Eyeglasses - Although they can also be held in hand, they are usually worn on the forehead. The eyepiece adopts a dual barrel (two eyes) body, and can use single or composite lenses according to different styles. Eyeglasses are the best choice for long-term observation, such as patrolling around buildings with poor lighting.
Camera - A camera using night vision technology can transmit images to a display for real-time playback, or record the transmitted images using a video recorder. When we need to perform high-quality night vision observations at a constant location, such as on a fixed building or when assembling night vision instruments as onboard equipment for helicopters, cameras can come in handy. Many new cameras have built-in night vision capabilities.
