Circular stepping synchronous control circuit based on enhancement type charge coupling imaging device

Abstract

The invention relates to an intensified charge coupled imager-based circular step synchronous control circuit, which is formed by connecting a laser drive signal module, a strobing gate control module, a circular step adder module and an image intensifier gain control module. The drive level signal output end of the laser drive signal module is connected with the trigger signal input end and the pulse laser drive signal input end of the strobing gate control module, the strobing level signal output end of the strobing gate control module is connected with the trigger signal input end of the image intensifier gain control module and the trigger signal input end of an ICCD, the data output end of the circular step adder module is connected with the data input end of the strobing gate control module and the data input end of the image intensifier gain control module, and the gain control signal output end of the image intensifier gain control module is connected with an image intensifiergain input end. The intensified charge coupled imager-based circular step synchronous control circuit solves the problem of circular step synchronous control of an imager, is high in precision and good in performance, and can be widely used in laser imaging radars.

Description

(1) Technical field [0001] The invention relates to a synchronous control circuit, in particular to a cycle-step synchronous control circuit based on an enhanced charge-coupled imager (ICCD), and belongs to the technical field of laser radar. (2) Background technology [0002] ICCD-based range-gated imaging lidar is an active imaging technology for detecting long-distance low-illumination targets. It uses range-gated synchronous control technology to synchronize the work of pulsed lasers and ICCD cameras, separated by time. The scattered light in the distance and the reflected light of the target make the radiation pulse reflected by the observed target reach the camera and form an image just within the working time of the ICCD camera gating. Among them, the synchronization control technology is the core technology to realize the range-gated imaging lidar, which directly controls the synchronization between the pulsed laser and the ICCD camera, and is the key technology to e...

AI Technical Summary

Problems solved by technology

[0003] The traditional synchronous control circuit only synchronously controls the opening of the gate of the pulse laser and ICCD camera, but ignores the synchronous control of the gain of the image intensifier, resulting in uneven illumination for imaging targets at different distances, and the entire circuit uses too much Composed of discrete components, the circuit is susceptible to external noise interference, and in the process of generating the strobe pulse, the signal transmission delay time is large, resulting in low accuracy and insufficient stability.

Images