A short-wave infrared imaging system based on linear array laser illumination and its working method

Abstract

The present invention relates to a short-wave infrared imaging system based on linear array laser illumination and a working method thereof. The short-wave infrared imaging system includes an imaging lens, an imaging detector, a synchronous control circuit and a laser emitter; the synchronous control circuit is connected with the imaging detector and the laser emitter respectively; the imaging frequency of the imaging detector and the laser emission frequency of the laser emitter equal. The integration time of the imaging detector can be used as a receiving gate without additional gates, which reduces the complexity and cost of the system; line array devices and lower power lasers can achieve better imaging effects and farther imaging distance.

Description

technical field [0001] The invention relates to a short-wave infrared imaging system based on linear array laser illumination and a working method thereof, belonging to the technical field of night vision imaging. Background technique [0002] The traditional night vision imaging technology is mainly low-light night vision and long-wave infrared imaging. The low-light night vision uses a vacuum image intensifier, which can amplify the weak light at night. It is widely used, but because of its working principle, it cannot be used in daytime. When used at night, it cannot be illuminated by strong light. Due to the large caliber of the lens required, night observation of long-distance targets cannot be performed. The long-wave infrared night vision device images the thermal radiation long-wave infrared of the target, and has a long range of action. Due to its long working wavelength, it can only display the general outline of the object, and its recognition ability is poor. ...

AI Technical Summary

Problems solved by technology

However, during long-distance imaging, the continuous illumination laser will be backscattered by the air, reducing image contrast and affecting observation. Generally, pulsed laser lighting is used to eliminate backscattering. For example, Chinese patent CN 101794057B discloses a long-distance night monitoring Laser strobe active night vision device

The night vision device uses area array imaging devices and laser area array lighting, which requires a lot of laser power and has low practicability

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