Third generation digital night vision instrument

2018-07-10 14:28:44 6

The name of the night vision instrument from the literal translation should be called the image intensifier. Its main core is the photomultiplier element, which is generally called an image enhancement tube, which simulates the real field of view by amplifying the dark light, so it is essentially different from the traditional optical telescope. The history of the night vision system reflects the history of modern military development, and the cooperation with the military has contributed to the development of night vision technology. Some of the world's big night vision brands are unexplained by the US military, such as the world's top two night vision brands ORPHA and ITT are the largest suppliers of American military night vision instruments.




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Third generation digital night vision instrument

The name of the night vision instrument from the literal translation should be called the image intensifier. Its main core is the photomultiplier element, which is generally called an image enhancement tube, which simulates the real field of view by amplifying the dark light, so it is essentially different from the traditional optical telescope. The history of the night vision system reflects the history of modern military development, and the cooperation with the military has contributed to the development of night vision technology. Some of the world's big night vision brands are unexplained by the US military, such as the world's top two night vision brands ORPHA and ITT are the largest suppliers of American military night vision instruments.

The principle of digital night vision is totally different from that of infrared night vision. Instead of using image intensifier as image intensifier, digital night vision device uses low illumination CCD as image intensifier. CCD with low illumination can identify very dark light, and then convert it into visible digital signal, which is displayed on the LCD screen inside the night vision instrument.

The third generation of night vision apparatus has been invented in the United States. Its advantage lies in its photocathode. The film is made of GaAs and has a sensitivity of up to 1000 U / lumen. This night vision device is especially suitable for dark night, because it is particularly sensitive to low infrared waves and can clearly distinguish light from concrete structures, green objects, especially individual objects. In addition, the night vision device is equipped with an ion barrier film to block charged ions from jumping back to the photocathode.

The third generation night vision instrument products: the third generation of gallium arsenide is used as a photoelectric coupling element, and the surface of the anode tube is plated with lanthanum ion film to prolong the service life. The sensitivity of the original part is 450-950 u m near red spectrum (the spectrum range is not near the near infrared spectrum) of 800 mu. The third generation gallium arsenide night vision equipment is now a high-end product. Its cost is high, the price is expensive, the structure is complex and the technical content is big, so this kind of product is rarely used in the civil market except for the military equipment.

The third generation digital night vision instrument invented by the United States, which uses the third generation of low illuminance CCD as an image intensifier, has a great leap in sensitivity and clarity than the two generation digital night vision instrument. CCD with low illumination can identify targets in the absence of light, and is very clear.