Introduction to night vision and optoelectronics
Night vision device also known as night vision glasses, night vision binoculars, and infrared binoculars, etc., is a kind of night observation in total darkness or shimmering instrument, the earliest in the military to be applied. After widely used in criminal investigation, security precautions, forest fire prevention, electric power and communications patrol, construction sites, farms, farm care, and even travel and other fields. Night vision instrument development so far after half a century, roughly divided into several kinds:
1. Microlight night vision technology, also known as like enhancement technology, is through the night-vision mirror with like enhancement tube, the weak light irradiation of the target like enhancement for observation of the photoelectric imaging technology. Microlight night vision device is currently foreign production * large and wide use * night vision equipment, can be divided into direct observation and indirect observation of two kinds.
2. Infrared night vision technology is divided into active and passive two kinds. Active infrared night vision technology is through the active irradiation and the use of target reflection of infrared light source to implement the observation of night vision technology, corresponding to the equipment for the active infrared night vision device. Although active infrared night vision technology has a clear image, simple production and other characteristics, but it also has an Achilles' heel is: in the battlefield, infrared light according to the infrared light will be found by the enemy's infrared detection devices. This weakness undoubtedly declares the fate of active infrared night vision technology will be eliminated. Passive infrared night vision technology is the target itself with the help of infrared radiation to realize the observation of infrared technology, simply put, according to the temperature difference to imaging, low resolution, but has its special purpose.
3. Part of the night vision device to improve the semiconductor material of the photocathode, making the micro-light and infrared are very sensitive to the infrared night vision and micro-light night vision device is unified in an instrument, in the night on a sunny day and micro-light night vision function, in the rain, foggy days at night to launch infrared light from the active infrared night vision function, and the role of the distance is farther than the simple passive micro-light night vision device.
