Non-scanning type single-time three-dimensional laser radar imaging method and device

Abstract

The invention discloses a non-scanning type single three-dimensional laser radar imaging method and device, and mainly solves problems that in an existing laser radar imaging technology, three-dimensional data acquisition of a dynamic target cannot be achieved, single three-dimensional imaging cannot be achieved, and an imaging device is complex in structure. The method comprises the following steps that a laser emits pulse laser to a beam splitter, and simultaneously emits a pulse electric signal which is delayed by a digital delayer and sent to a streak camera; the pulse laser reaches a target position after being reflected by the beam splitter and expanded by the beam expander or the telescope, and an optical signal reflected by the target position returns to the beam splitter and is transmitted after being collected by the beam expander or the telescope; an optical mask plate encodes the projected pulse laser into a pseudo-random code; the streak camera converts a pseudo-random coded optical signal into an electric signal, then reconstructs a three-dimensional image of a target position through a compressed sensing algorithm, and finally displays a three-dimensional image of the target position through the fluorescent screen.

Description

technical field [0001] The invention relates to the technical field of laser radar imaging, in particular to a non-scanning single-shot three-dimensional laser radar imaging method and device. Background technique [0002] Lidar imaging application research began in the 1970s. It is a comprehensive new technology product of laser technology, radar technology, optical scanning and control technology, high-sensitivity detection technology and high-speed computer processing technology. The basic principle of lidar imaging is to judge the three-dimensional spatial position of the target by obtaining the entire flight time difference between the laser beam reaching different points of the target and returning to the detector, and realizing three-dimensional imaging. Existing lidar 3D imaging technologies mainly include: single-photon avalanche diode lidar technology, area-array single-photon avalanche diode-based lidar technology, streak camera-based lidar technology, etc. [00...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a non-scanning single-shot three-dimensional laser radar imaging method and device to solve the problem that the existing laser radar imaging technology cannot achieve three-dimensional data acquisition for dynamic targets, cannot perform single-shot three-dimensional imaging, and the structure of the imaging device is complex And other issues

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