Laser illumination distance gating imaging device

Abstract

The invention relates to a laser illumination distance gating imaging device, belonging to the technical field of laser imaging and comprising a laser, near infrared camera, a synchronous control unit, a receiving telescope, an image signal processor, a central processing unit, an image monitor and a synchronous control unit; the laser is a laser outputting human eyes safe laser with output wavelength being 1.5mu m-1.6mu m; and the synchronous control unit comprises a photodiode, a timing unit and a distance gating shutter. The invention has the main characteristics of high peak power, relative safe for human eyes, high conversion efficiency and high sensitiveness.

Description

technical field [0001] The invention relates to a laser illumination distance gating imaging device, which belongs to the technical field of laser imaging, and is suitable for use under the conditions of eliminating atmospheric backscattering and obtaining target image information under low illumination and complex background conditions, and is especially widely used in photoelectric In reconnaissance, surveillance, tracking and other equipment. Background technique [0002] The image information of the target is one of the important information that reconnaissance, surveillance, and tracking equipment need to obtain. There are two types of devices for obtaining this important information in the prior art: [0003] One category is CCD cameras and infrared thermal imaging cameras. It obtains the image information of the target by detecting the visible light and infrared radiation of the target. It has a long range and passive detection. Therefore, it has good concealment an...

AI Technical Summary

Problems solved by technology

However, the main deficiency of the CCD camera is: in the case of low ambient illumination and poor visibility, the working distance is limited; the main deficiency of the infrared thermal phase instrument is: when the temperature difference between the target and the background is small, its resolution and working distance are sharply reduced. In addition, when the target is hidden behind camouflage nets, smoke screens, woods and other targets, the CCD camera and thermal imaging camera cannot obtain the image information of the target

Existing laser active lighting imaging devices mostly use semiconductor lasers in the 800nm-900nm band as the lighting source, and use ordinary near-infrared CCD cameras for imaging. After irradiating the human eye, the lens absorbs less of it, and most of it is focused on the retina, which is likely to cause irreversible damage or even blindness; ②The sensitivity of ordinary near-infrared CCD cameras is low, and the working distance is limited; ③When the laser emits When the power is high, the backscattering is serious

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