What are the three types of night vision devices?


1. Active infrared night vision device

Principle: The instrument emits an infrared beam to illuminate the target, and converts the infrared image reflected by the target into a visible light image for nighttime observation. Mainly used for military night vision, driving vehicles, reconnaissance and photography, etc.

Features: Not limited by illuminance, can be observed in complete darkness, the effect is very good, and the price is cheap. However, the viewing distance is short, and it is easy to be spotted by the other party during the observation period, thereby exposing itself. Now it is rarely used in the military field.

Today, it is mainly used in civilian night vision equipment.

2. Low-light night vision device

Principle: The instrument uses the low-brightness night sky, stars, moon and atmospheric glow reflected by the target at night to enhance it by hundreds of thousands of times, so as to be suitable for naked eye reconnaissance, observation, aiming, vehicle driving and other battlefield operations at night.

Features: Since the low-light night vision device uses night sky lighting to work, it is a passive way of working, so it can better hide from the hiding places of departments engaged in special tasks such as military, criminal investigation, drugs, etc. Edit, privatize, night it works best for surveillance and security applications. Low-light night vision devices have been developed for three generations. The first generation is a three-stage cascade low-light night vision device (composed of three generations of 0 photocells in series). The second generation is a microchannel plate type low-light night vision device, and the third generation is a ||| -V negative electron affinity photocathode image intensifier low-light night vision device. During the transition from the second generation to the third generation, a super second-generation photocell called the second-generation plus was developed, whose technical performance is second only to the third-generation product. Low-light night vision devices are divided into five levels: Gen 0, Gen 1, Gen 2, Gen 2 Plus and Gen 3. So far, the development of low-light night vision devices is technically mature, with good imaging quality and low cost. Therefore, they will remain one of the main devices for night vision devices in the world for a long time to come. The second-generation plus and third-generation products are characterized by small size, light weight, clear image, complete functions and practicality. It is essential equipment for night work in military, public safety, armed police, customs, oil industry, news gathering, tourism, aquaculture, nature lovers and other industries.

However, since the core components of low-light image intensifiers are high-tech products, the process is particularly complex, expensive and relatively expensive. But from a performance-to-price ratio perspective, it's still pretty good.

3. Thermal imaging infrared instrument

Principle: The basic principle of thermal imaging cameras is that all objects with an absolute temperature higher than zero (-273°C) have the basic principle of radiating infrared rays, and the difference between the target and the background radiating infrared rays is used to find and identify the target.

Features: Due to the different infrared radiation intensity of various objects, people, animals, vehicles, airplanes, etc. can be clearly observed, and are not affected by obstacles such as smoke, fog, and trees, and can work day and night at the same time. It is the most advanced night vision observation equipment currently possessed by humans. However, due to the extremely high price, it can only be used in the military at present. However, due to the widespread application of thermal imaging, there is a huge market in the fields of power, underground pipelines, fire and medical, disaster relief and industrial inspection. The development, advancement and high technology of infrared thermal imaging technology will be applied to the private market on a large scale within 30 years and contribute to mankind. The cheapest thermal imagers on the market today cost tens of thousands of dollars, let alone a premium one. It won't catch on anytime soon.

Fourth, laser night vision device / night vision system

This product is widely used in border defense, military, public security, cultural relics, bases, oil fields, industrial and mining, factories, fisheries, forest farms, orchards and other places and fields.

This device is suitable for all-weather, especially ideal night-time zero-light surveillance camera system. Its monitoring distance ranges from a few meters to a few kilometers. It is an excellent high-quality high-quality product that has been tested in practical applications in similar products. Technical surveillance camera products. The principle of laser night vision is similar to that of infrared night vision, but the observation distance is longer, which can reach more than several kilometers. Night vision goggles are usually mainly used for surveillance, but they are also quite expensive, costing tens of thousands of dollars. The product has been around for a few years, and it is now rapidly circulating in the market due to its various properties. The prospects for the future are bright.

A lot of people expect this kind of cheap and good night vision goggles, but honestly if you see something cheap and want to buy it, then you should be prepared to pay tuition. According to your own needs, choose the best night vision equipment for you, don't buy irregular products for cheap.