Prism and multiline laser radar system

Abstract

The embodiment of the invention discloses a prism and a multiline laser radar system. The prism is used for the multiline laser radar, and comprises a top surface, a bottom surface, and at least threesides located between the top surface and the bottom surface, wherein at least two sides comprise an emission region and a receiving region; the receiving region is located between the emission region and the top surface; the emission region comprises at least two reflecting surfaces orderly arranged along a direction pointing to the bottom surface from the top surface; and the included angles between at least two reflecting surfaces and the bottom surface are different. The prism provided by the embodiment of the invention is used for the multiline laser radar system, and the effect of reducing the manufacturing cost and the manufacturing difficulty of the multiline laser radar system can be realized.

Description

technical field [0001] Embodiments of the present invention relate to lidar technology, in particular to a prism and multi-line lidar system. Background technique [0002] With the development of laser technology, laser scanning technology is more and more widely used in fields such as surveying, transportation, driver assistance and mobile robots. Lidar is a radar system that uses laser to detect the position, speed and other characteristic quantities of the target. Its working principle is to first transmit the detection laser beam to the target, and then compare the received signal reflected from the target with the transmitted signal, and make an appropriate After processing, information such as distance, azimuth, height, speed, attitude, and even shape of the target can be obtained. [0003] At present, the most commonly used lidar includes single-line lidar optical system and multi-line lidar optical system. Among them, single-line lidar uses a single beam to scan, an...

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Problems solved by technology

[0003] At present, the most commonly used lidar includes single-line lidar optical system and multi-line lidar optical system. Among them, single-line lidar uses a single beam to scan, and the scanning area is small; multi-line lidar scans the surrounding environment through motor rotation. The telephoto large target surface receiving optical system focuses the light returned from the irradiated object on the corresponding photoelectric sensor, and can emit and receive multiple arrays of light beams to scan a certain area around the ring mirror. The disadvantage is that too many laser transmitters are required, and the receiver needs to have a large photosensitive surface to receive the laser beam reflected by the target, and the processing circuit is more complicated and the cost is higher

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