Self-triggering gated laser imaging device

Abstract

The invention provides a self-triggering gated laser imaging device, which belongs to the technical field of laser active imaging detection, and aims at the problem that an imaging detection signal-to-noise ratio needs to be increased in the prior art. The self-triggering gated laser imaging device comprises a microporous array gate, which is structurally characterized in that: micron-sized through holes are densely formed in the axial direction in a circular thin-plate glass substrate, all the through holes are parallel and each form an angle ranging from 7 to 15 degrees with the axis of theglass substrate, and the top surface of the glass substrate is plated with a metal film as a trigger signal bypass electrode; the bottom surface of the microporous array gate is in contact with the incident end surface of the second microchannel plate; the rigger signal bypass electrode is in contact with a trigger signal input end of the trigger circuit, gating signal output ends of the trigger circuit is connected with gating signal input ends of a pulsed power supply and the control circuit, two electrode ends of the pulsed power supply are connected with an emergent end surface electrode of a level 1 microporous channel plate and an incident end surface electrode of a level 2 microporous channel plate, and a 50-100 V reverse voltage or a 200-250 V forward voltage is added between the two electrodes; and a driving signal output end of the control circuit is connected with an electronic shutter of a gate video camera.

Description

technical field [0001] The invention relates to a self-triggering and gating laser imaging device, which belongs to the technical field of laser active imaging detection. Background technique [0002] The existing range-gated laser active imaging detection technology is that the laser imaging light source emits infrared short-pulse laser, which is divided into beams after being collimated. One beam illuminates the target and is reflected by the target to become a detection image signal and imaged on the gating camera; the other beam After the target is illuminated, it is reflected by the target as an external trigger source and received by an external trigger device (such as APD) as a delayed reference pulse; the delay time of the synchronous control circuit is determined according to the distance between the laser imaging light source and the target, and determined according to the imaging detection depth of field The duration of the opening of the gate, at the moment of ga...

AI Technical Summary

Problems solved by technology

It’s just that the spectroscopic scheme adopted by this scheme makes part of the laser light not used for imaging, which will inevitably reduce the optical power of the detection image signal, which is not conducive to the improvement of the signal-to-noise ratio of imaging detection

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