A big list of principles and features of each type of night vision device
I. Active infrared night vision device.
Principle: the instrument emits infrared beams outward, irradiates the target, and converts the infrared image reflected by the target into a visible light image, so as to carry out night observation, and functionally is mainly used for night aiming, driving a vehicle, reconnaissance photography and so on.
Characteristics: not subject to the limitations of illumination, all black can be observed, and the effect is very good, inexpensive.
But the observation distance is close, it is easy to be found by the other party when observing, thus exposing themselves, now ** has been rarely used.
Now mainly for civilian use, Dr. Can, ATN have a lot of products in this area.
Second, micro-light night vision device.
Principle: the instrument uses the night target reflected low-brightness night sky light stars, moonlight, atmospheric glow and other natural light, will be enhanced 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.
Characteristics: Because the microlight 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.
Microlight night vision instrument has developed three generations, the first generation of three-stage cascade microlight night vision instrument (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 like the enhancement of microluminescent night vision device. In the ** generation to the third generation over the development of a super-second generation of photocells called the second generation plus, its technical performance is second only to the third generation of products. Microlight night vision devices such as fine categorization then is 0 generation, 1 generation, 2 generation, 2 generation plus, 3 generation, a total of 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 public security, armed police, customs, oil industry, news interviews, tourism, aquaculture, nature lovers, and other industries night work indispensable equipment. However, due to its core components of 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.
Third, thermal imaging infrared instrument
Principle: Thermal imaging infrared instrument is based on any higher than all ** temperature zero (-273 ° C) above the object have radiated infrared radiation of the basic principles, the use of the target and the background of their own infrared radiation differences in order to find and identify the target instrument.
Characteristics: due to the various objects infrared radiation intensity is different, so that people, animals, vehicles, airplanes, etc. clearly be observed, and is not affected by smoke, fog and trees and other obstacles, day and night can work. Is currently mastered by mankind * advanced night vision observation equipment. 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 civil market, to contribute to mankind. Currently on the market * low-priced thermal imaging also have to be tens of thousands of dollars, a good more needless to say. Within a short time is not popular.
