Compact solid-state laser radar with large field angle

Abstract

The invention relates to a compact solid-state laser radar with a large field angle. The vertical field angle of the laser radar is doubled through a laser beam splitting mode under the condition that the size and devices are not increased, so that the market range of the laser radar is greatly broadened. The laser radar system comprises a transmitting unit, a light splitting unit, a polarization unit, a trigger unit, a reflection unit, a focusing unit, a projection unit and a detection unit. The transmitting unit is used for transmitting 2N beams of collimated emergent laser, and N is greater than or equal to 1. The light splitting unit is used for splitting the 2N laser beams into 4N parallel equal-light-intensity light beams. The polarization unit is used for changing the polarization states of the light beams emitted by the polarization unit. The trigger unit is used for detecting a laser trigger signal. According to the invention, the field angle of the solid-state laser radar can be expanded, and the laser radar which is low in cost, compact in structure and large in field angle is provided.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a compact solid-state laser radar with a large viewing angle. Background technique [0002] In recent years, with the continuous development of automatic driving technology, lidar has made great progress as the core component of automatic driving system. Its measurement range can reach hundreds of meters, and its measurement accuracy can reach millimeter level. It has fast response speed and strong anti-interference ability. And many other advantages. Therefore, lidar also has broad application prospects in other fields such as drones, security, and terrain mapping. [0003] However, the hybrid solid-state lidar based on the two-dimensional galvanometer scanning technology has a limited scanning field of view, and it is difficult to balance a large scanning field of view with a high scanning frequency. The reason is that there is a contradiction between the deflection angle...

AI Technical Summary

Problems solved by technology

[0003] However, the hybrid solid-state lidar based on the two-dimensional galvanometer scanning technology has a limited scanning field of view, and it is difficult to take into account the large scanning field of view and high scanning frequency.

The reason is that there is a contradiction between the deflection angle of the two-dimensional galvanometer and its operating frequency. To obtain a wide range of deflection angles and a high operating frequency at the same time requires extremely high processing technology for the galvanometer and the production cost is difficult to control.

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