1, active infrared night vision device;
2, micro-light night vision device;
3, infrared thermal imager;
4, laser night vision device
Active infrared night vision device.
Principle: the instrument emits infrared beams outward, irradiates the target, and converts the infrared image reflected from the target into a visible light image for nighttime observation, which is mainly used in the military for nighttime aiming, driving vehicles, reconnaissance photography and so on.
Features: not subject to the limitations of illumination, all black can be observed, and the effect is very good, cheap.
But the observation distance is close, in the observation is easy to be found by the other side, thus exposing themselves, now the military has been rarely used.
Today, it is mainly used for civilian use, and Dr. Neng, ATN has many products in this area.
Second, the micro-light night vision device.
Principle: the instrument utilizes the night target reflects the low brightness of the night sky light stars and moonlight atmospheric glow and other natural light, will be enhanced and amplified to hundreds of thousands of times, so as to achieve suitable for the naked eye at night for reconnaissance, observation, aiming, vehicle driving and other battlefield operations.
Features: Because the micro-light night vision device is the use of night sky light to work, is a passive way of working, so it can better hide themselves, engaged in special work departments, such as the military, criminal investigation, drug trafficking, private investigation, night surveillance, security applications, it is the most suitable.
Micro-light night vision has developed three generations, the first generation of three-stage cascade micro-light night vision (composed of three 0 photocells in series). The second generation for the microchannel plate type microluminescent night vision device, the third generation for the |||-V negative electron affinity potential photocathode image enhancer microluminescent night vision device. In the second generation to the third generation over the development of a super second-generation photocathode called second-generation plus, its technical performance is second only to third-generation products. Microlight night vision devices such as fine categorization then is 0 generation, 1 generation, 2 generation, 2 generation plus, 3 generation, **** five grades. Microlight night vision instrument development to today, the technology has been relatively mature and good imaging quality, low cost, so in the future for quite a period of time, they are still the world's night vision equipment a major equipment. Second-generation plus and third-generation products with small size, light weight, clear image, full-featured, practical and other characteristics. Is the army, public security, armed police, customs, oil industry, news interviews, tourism, aquaculture, nature lovers, and other industries night work indispensable equipment.
But because of its core component, the micro-optical image enhancer is a high-tech products, the process is particularly complex, high cost, relatively high prices. But from the performance-price ratio, or quite good.
Three categories, thermal imaging infrared instrument
Principle: Thermal imaging infrared instrument is based on any higher than all the absolute temperature above zero (-273 ℃) above the object has a radiated infrared radiation of the basic principles, the use of the target and the background of their own radiated infrared radiation differences to find and identify the target instrument.
Features: Because of the different intensity of infrared radiation of various objects, so that people, animals, vehicles, airplanes, etc. are clearly observed, and not subject to smoke, fog and trees and other obstacles, day and night can work. Is currently the most advanced night vision observation equipment mastered by mankind. But because the price is particularly expensive, can only be applied to the military, but due to the thermal imaging applications are very wide, electric power, underground pipelines, fire medical, disaster relief, industrial testing, etc. There is a huge market, with the development of socio-economic, scientific and technological advances, infrared thermography, this high-tech in two or three decades will be large-scale application of the civilian market, to contribute to mankind. Currently on the market at the lowest price of thermal imaging also have to tens of thousands of dollars, a good more needless to say. Short time is not popular.
Four: laser night vision device / night vision system
This type of product is widely used in border guards, troops, public security, cultural relics, bases, oilfields, industrial and mining, factories, fisheries, forests, orchards, and other places and fields.
The equipment is suitable for all-weather, especially at night zero light the most ideal surveillance camera system, its monitoring distance from a few meters to several kilometers ranging from similar products in the actual application of the effectiveness of the test and the quality of excellent high-tech surveillance camera products. Laser night vision and infrared night vision is similar to the principle, but the observation distance is farther, can reach more than a few thousand meters, generally mainly used for monitoring, but the price is also quite expensive, but also have to tens of thousands of dollars or so. The product is not new for a few years, due to its various characteristics, the market is now flowing very quickly. The future outlook is promising.
Many people expect that kind of cheap and good night vision, but honestly, if you see a piece of cheap stuff you want to buy, you have to be ready to pay tuition fees. According to your own needs, choose a good night vision device that is most suitable for your use, do not be greedy for cheap, and buy irregular products.