Lidar scanning device and system based on multi-spatial light modulator splicing

Abstract

The invention provides a lidar scanning device based on multi-spatial light modulator splicing, and the device comprises a light source component, a beam splitting prism, a detection target and a spatial light modulator, wherein the light beam emitted by the light source component reaches the detection target through the spatial light modulator and the beam splitting prism in order, or the light beam emitted by the light source component reaches the detection target through the beam splitting prism and the spatial light modulator in order. The lidar scanning device provided by the invention utilizes the phase modulation capability of the spatial light modulator to control the shape and deflection direction of the light beam, generates a multi-point laser dot matrix at one time, and then quickly generates a laser scanning dot matrix by combining the timing refresh capability of the spatial light modulator to complete the scanning and detection of the target space, thereby improving theworking efficiency of the lidar system.

Description

technical field [0001] The present invention relates to the technical field of radar scanning, in particular to a laser radar scanning device and system based on multi-spatial light modulator splicing. Background technique [0002] Lidar is a radar system that detects the target's position, speed and other characteristic quantities by emitting a laser beam to the target and receiving scattered echoes. The detection of the target by lidar needs to be based on the scanning of the detection space by emitting laser light. The currently widely used scanning methods are optical-mechanical scanning and scanning based on optical phased array devices. The optical-mechanical scanning method is generally realized by a rotating scanning mirror. Since this type of system contains moving parts, the scanning speed is relatively low and the application is limited. The scanning method based on the optical phased array device does not require mechanical moving parts, and the scanning can be ...

AI Technical Summary

Problems solved by technology

The optical-mechanical scanning method is generally realized by a rotating scanning mirror. Since this type of system contains moving parts, the scanning speed is relatively low and the application is limited.

The scanning method based on optical phased array devices does not require mechanical moving parts, and can be scanned by electronic control, but due to the limitations of current devices, the scanning angle is small

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