Viewing Performance of Night Vision Devices
Low light night vision technology, also known as image enhancement technology, is a photoelectric imaging technology that enhances the target image under weak light illumination through night vision goggles with image enhancement tubes for observation. Low light night vision devices are currently the most widely produced and versatile night vision equipment in foreign countries.
Infrared night vision technology is divided into two types: active and passive. Active infrared night vision technology is a night vision technology that observes by actively illuminating and utilizing the infrared light reflected by the target's infrared source. The corresponding equipment is an active infrared night vision device. Active infrared night vision technology has clear imaging and low cost. Passive infrared night vision technology is an infrared technology that uses the infrared radiation emitted by the target itself to achieve observation. Simply put, it images based on different temperatures with low resolution, but it has its special purpose.
Russian night vision devices mostly belong to the third generation of low light night vision devices. The semiconductor material of the photocathode has been improved, making them sensitive to both low light and infrared. The infrared night vision device and the low light night vision device are unified into one instrument, which functions as a low light night vision device on clear days and nights, and emits infrared light as an active infrared night vision device on rainy and foggy days and nights, with a longer operating distance than the second generation.
At present, thermal imaging technology is developing rapidly. However, due to high costs, poor imaging quality, and inaccurate target recognition, the United States and Russia have not equipped it in large quantities,
Through testing, it has been found that single tube night vision devices can only see up to 10 meters without a transmitter when there is no visible light (no visible light, no fingers visible). However, with the development of a transmitter, it can see up to 50 meters, while with different models of dual tube night vision devices, it can see up to 50-100 meters. Under visible light (such as starlight, moonlight, street lights, and clouds), one can see from several hundred meters to several kilometers.
