Radar and angle adjusting device

Abstract

The invention provides a radar and an angle adjusting device, the angle adjusting device comprises a first annular spherical mirror and a second annular spherical mirror which are stacked in sequence,the curvature radiuses of the first annular spherical mirror and the second annular spherical mirror are the same, the inner surfaces of the first annular spherical mirror and the second annular spherical mirror are spherical surfaces, and a light through hole is formed in the side wall of the first annular spherical mirror. A first light passing opening is formed in the side wall of the second annular spherical mirror, and an initial light beam can enter a cavity of the first annular spherical mirror through the light passing hole, is reflected once on the inner surface of the second annularspherical mirror after being reflected for N-1 times on the inner surface of the first annular spherical mirror, and is emitted through the first light passing opening; due to the fact that the initial light beam is reflected by the inner surface of the spherical mirror, the field angle range of the emitted initial light beam is larger than the field angle range of the incident initial light beamaccording to the geometrical optics principle, the field angle range can be expanded, and the field angle range of the radar can be expanded when the angle adjusting device is applied to the radar.

Description

technical field [0001] The invention relates to the field of optics, in particular to a radar and an angle adjustment device. Background technique [0002] Radar is a device used for distance measurement. Specifically, the initial signal emitted by the radar is reflected by the object to form an echo signal, and the echo signal is compared with the initial signal to obtain accurate information on the distance of the measured object. Among them, the initial signal can be a laser signal. The laser has the advantages of small beam divergence, concentrated energy, good directivity, and high repetition frequency, so that the laser radar can realize long-distance and high-precision measurement of the measured object. At present, lidar is widely used in aerospace, remote sensing detection, measurement, and intelligent driving. [0003] Typically, radars have a limited field of view. Traditional radar can use Micro-Electro-Mechanical System (MEMS) scanning to expand the field of v...

AI Technical Summary

Problems solved by technology

Traditional radar can use Micro-Electro-Mechanical System (MEMS) scanning to expand the field of view, use MEMS micromirrors to complete vertical scanning, and rotate the fuselage to complete horizontal scanning, which is difficult to assemble and debug However, if multiple MEMS micromirrors are used to cover a larger field of view, a larger cost will be incurred, and the splicing between the fields of view will be more troublesome

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