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

A technology of spatial light modulator and light modulator, applied in the field of radar scanning, can solve the problems of limitation, low scanning speed, small scanning angle, etc., and achieve the effect of expanding the deflection angle, expanding the scanning angle, and stabilizing the scanning system

Pending Publication Date: 2019-12-20
上海影创信息科技有限公司
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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.
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  • Lidar scanning device and system based on multi-spatial light modulator splicing
  • Lidar scanning device and system based on multi-spatial light modulator splicing
  • Lidar scanning device and system based on multi-spatial light modulator splicing

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0062] According to the present invention, a laser radar scanning device based on multi-spatial light modulator splicing includes:

[0063] Light source components, beam splitters, detection targets, spatial light modulators;

[0064] The light beam emitted by the light source assembly sequentially passes through the spatial light modulator and the beam splitting prism to reach the detection target, or;

[0065] The light beam emitted by the light source component passes through the beam splitting pris...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01S7/481
CPCG01S7/4817
Inventor 曾震湘董若
Owner 上海影创信息科技有限公司
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