Large-angle transmitting-receiving synchronous laser radar optical system

Abstract

The invention belongs to the field of laser radar optical systems, and relates to a large-angle transceiving synchronous laser radar optical system. The problem that an existing MEMS laser radar cannot be compatible with large detection view field, high detection frame rate and long-distance detection is solved. A laser emission chip and a photoelectric detector response chip are implanted into the surface of an MEMS scanning galvanometer type scanning element. While the MEMS scanning galvanometer is controlled to vibrate, the laser emission chip is controlled to emit laser and the photoelectric detector response chip is controlled to receive the response of a signal, and the laser emission light source does not need to be reflected by the surface of the MEMS scanning galvanometer, namely, the MEMS scanning galvanometer does not play a role of a scanning reflector any more. The laser emission chip can directly follow the MEMS scanning galvanometer to scan and emit light, and meanwhile, an angle-expanding optical system is arranged outside or field splicing is carried out to shape small-angle scanning into wide-angle scanning emission, so that the restriction of the area size of the MEMS scanning galvanometer on the scanning resonant frequency and the scanning angle is weakened.

Description

technical field [0001] The invention belongs to the field of laser radar optical systems, and relates to a large-angle transmitting and receiving synchronous laser radar optical system. Background technique [0002] There are several ways to use laser radar to achieve ranging and three-dimensional imaging: 1. Traditional mechanical rotary scanning, which drives the laser radar to rotate 360° through a mechanical device; this type of system has the problem of large dimensions and serious wear and tear after a long time ; 2, all-solid-state scanning (such as optical phased array), change the emission angle by adjusting the phase difference of each emission unit in the emission array; this type of system has the problem that the cost of core components is too high; 3, MEMS (micro-electromechanical system ) hybrid solid-state scanning can be made into a one-dimensional or two-dimensional MEMS scanning galvanometer scanning surface, and only one laser beam can scan the entire det...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the MEMS laser radar cannot be compatible with large detection field of view, high detection frame rate and long-distance detection because the MEMS scanning galvanometer cannot be compatible with large scanning angle, high resonance frequency and large receiving area, the present invention proposes a large-angle transceiver Synchronized lidar optics

Both one-dimensional and two-dimensional MEMS scanning mirrors are available

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