Laser transmitters, lidars and smart devices

Abstract

The embodiment of the present invention relates to the field of laser technology, and discloses a laser emitting device, a laser radar, and an intelligent device. The laser emitting device includes a light source, a fast axis collimation module, and a slow axis collimation module arranged in sequence. The laser light passes through the fast-axis collimation module and the slow-axis collimation module in turn, and is collimated and processed by the fast-axis collimation module and the slow-axis collimation module. The laser emitting device also includes a spacer, and the spacer is arranged on the Between the fast-axis collimation module and the slow-axis collimation module, the spacer is used to eliminate the overflow light output by the fast-axis collimation module. Through the above method, the embodiment of the present invention eliminates the overflow light from between the fast-axis collimation module and the slow-axis collimation module, and prevents the overflow light from entering the nearby optical channel, causing optical crosstalk, and affecting the performance of the laser emitting device.

Description

technical field [0001] Embodiments of the present invention relate to the field of laser technology, and in particular to a laser emitting device, a laser radar and an intelligent device. Background technique [0002] Lidar is a radar system that detects the position and speed of targets by emitting laser light. It is widely used in atmospheric detection, urban surveying and mapping, ocean detection, automatic driving, robotics, laser TV, laser three-dimensional imaging and other technical fields. [0003] In the process of realizing the embodiments of the present invention, the inventors found that: currently, as figure 1 As shown, the laser emitting device 10 used for emitting laser in the laser radar generally includes a light source 11, a fast-axis collimation module 12 and a slow-axis collimation module 13, and the laser light output by the light source 11 passes through the fast-axis collimation module 12 and the slow-axis collimation module in sequence. The collimati...

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Problems solved by technology

[0003] In the process of realizing the embodiments of the present invention, the inventors found that: currently, as figure 1 As shown, the laser emitting device 10 used for emitting laser in the laser radar generally includes a light source 11, a fast-axis collimation module 12 and a slow-axis collimation module 13, and the laser light output by the light source 11 passes through the fast-axis collimation module 12 and the slow-axis collimation module in sequence. The collimation module 13 collimates, but the fast-axis collimation module 12 and the slow-axis collimation module 13 are usually arranged at intervals, and the aperture of the slow-axis collimation module 13 is limited, and the output of the fast-axis collimation module The laser light usually does not all fall in the aperture of the slow-axis collimation module 13, and the laser light 15 falling outside the aperture of the slow-axis collimation module 13 will pass between the fast-axis collimation module 12 and the slow-axis collimation module 13. The space overflows to form overflow light, and when the overflow light enters the nearby optical channel, it will cause optical crosstalk and affect the performance of the laser emitting device 10

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