Laser radar, fast axis and slow axis light beam energy convergence system and convergence method

Abstract

The invention discloses a laser radar, and a fast axis and slow axis light beam energy convergence system and convergence method. The fast axis and slow axis light beam energy convergence system comprises a correction device, a focusing device and a collimation device, wherein the correction device is used for correcting divergence angles of an outgoing beam in a fast axis and a slow axis to be same or approximately same; the focusing device is arranged on the light exit side of the correction device, so that the outgoing angles of the outgoing beam in the fast axis direction and the slow axisdirection are the same or approximately same, and thus a focusing light source is acquired; the collimation device is arranged on the light exit side of the focusing device, and the focus of the object side of the collimation device is arranged at the focus of the focusing device, or arranged close to the focus of the focusing device, so that energy distribution of the outgoing beam is converged;the correction device, the focusing device and the collimation device are provided with the same principle optical axes. By using the fast axis and slow axis light beam energy convergence system andconvergence method, the energy distribution of the outgoing beam can be converged, and thus the condition that the laser radar can work accurately by using the convergence method and system is ensured.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a laser radar, a convergence system and a convergence method of beam energy of a fast and slow axis. Background technique [0002] With the rise of unmanned driving technology, as the "eyes" of unmanned driving, the marketization process of lidar technology is accelerating. On modern traffic roads, there are many signs made of high reflectivity materials. Since the light field intensity of the light source of the lidar is Gaussian distribution or approximate Gaussian distribution, if the outgoing beam is directly collimated, it is difficult to constrain the energy distribution of the beam, resulting in the presence of objects with high reflectance coefficients, and the spatial resolution of the lidar becomes lower. It is very rough, which is not conducive to the precise work of lidar. Contents of the invention [0003] Based on this, it is necessary to provide a laser radar, a...

AI Technical Summary

Problems solved by technology

Since the light field intensity of the light source of the lidar is Gaussian distribution or approximate Gaussian distribution, if the outgoing beam is directly collimated, it is difficult to constrain the energy distribution of the beam, resulting in the presence of objects with high reflection coefficients, and the spatial resolution of the lidar becomes lower. It is very rough, which is not conducive to the precise work of the lidar

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