Light shielding member, lens set with light shielding structure and laser radar

Abstract

The invention provides a light shielding member, a lens set with a light shielding structure and a laser radar. The light shielding member comprises a first shielding part and a connecting part, wherein the first shading part and the connecting part form a first preset included angle, and the first shading part is extended to a first preset height in the direction away from the connecting part. The lens set with a light shielding structure comprises a first lens set, a second lens set and the light shielding member; wherein the first lens set and the second lens set are adjacently arranged, the first lens set comprises at least one optical lens with a first surface, and the first shading part covers part of the first surface. The light shielding member is simple in structure and can be easily assembled onto an existing laser radar, and the production cost and the research and development cost are reduced. The lens set with the light shielding member is used on a laser radar to reduce the influence of stray light, and the generation of ghost images or trailing phenomena of the laser radar is avoided.

Description

technical field [0001] The invention relates to the technical field of environment perception, and in particular to a light-shielding member, a lens group with a light-shielding structure and a laser radar. Background technique [0002] In the autonomous driving technology, the environmental perception system is a basic and crucial part, and it is the guarantee of the safety and intelligence of the autonomous driving vehicle. The lidar in the environmental perception sensor has great advantages in terms of reliability, detection range, and ranging accuracy. Incomparable advantages. The laser radar transmits and receives the laser beam, analyzes the turn-back time after the laser encounters the target object, and calculates the relative distance between the target object and the vehicle. [0003] Among the many components contained in LiDAR, the transceiver lens group is an important part of LiDAR. The detection light emitted by the laser radar through the light source is d...

AI Technical Summary

Problems solved by technology

During the working process of the laser radar, some stray light in the system is emitted abnormally, and when encountering a strong reflection target at a short distance, it will affect the normal echo signal, such as ghosting and tailing, which will affect the laser radar. ranging and imaging accuracy

In addition, double images, flare, etc. may also occur due to unnecessary reflection, deviation, and diffusion in the lens barrel or at the lens end surface.

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