Optoelectronics and Night Vision
Night vision device is also known as night vision glasses, night vision telescope, and infrared telescope, etc., is a kind of night observation in total darkness or with a faint light of the 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 device 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 goggles 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 the largest foreign production and the most widely used night vision equipment, can be divided into direct observation and indirect observation of two kinds. 2.
2. Infrared night vision technology is divided into active and passive two. 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 active infrared night vision device. Although active infrared night vision technology has clear imaging, 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 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 use of infrared radiation emitted by the target itself to realize the observation of infrared technology, simply put, according to the temperature difference to imaging, very low resolution, but has its special purpose.
3. Part of the night vision device to improve the semiconductor material of the photoelectric cathode, making the micro-light and infrared are very sensitive to the infrared night vision device and micro-light night vision device united in an instrument, in the night on a sunny day micro-light night vision function, in the rain, foggy days at night emitting infrared rays from the active infrared night vision function, and the role of the distance is farther than the simple passive micro-light night vision device.
