Method for determining laser radar transmitting optical system and electronic equipment

Abstract

The invention is suitable for the technical field of laser radars, and provides a method for determining a laser radar transmitting optical system and electronic equipment, and the method comprises the steps: constructing a transmitting optical system which comprises a light source, a Pechan prism and a plano-convex lens; acquiring a first refractive index and a second refractive index of the system; calculating a first length and a second length of an incident aperture of the Pechan prism based on a constraint condition that the marginal light can enter the plano-convex lens through the Pechan prism; calculating an ellipsoid equation of the plano-convex lens based on the first refractive index, the second refractive index and an aplanatism principle; calculating the thickness of the plano-convex lens at the optical axis based on the incident height of the edge light in the plano-convex lens; and adjusting the emission optical system based on the first length, the second length, the ellipsoid equation and the thickness. According to the determination method of the laser radar transmitting optical system, the size of the system can be reduced on the premise of ensuring the transmitting power, and the miniaturization of the system is realized.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a method for determining a laser radar emitting optical system and electronic equipment. Background technique [0002] Lidar has excellent performance of high ranging accuracy, high angular resolution, and high repetition rate, and is widely used in intelligent robots, automatic tractors, assisted driving, and security. In lidar, the functions of the transmitting optical system include functions such as light source power output, beam collimation, and shaping. The performance of the transmitting optical system is directly related to the performance of the laser radar for detecting, measuring and locating targets. [0003] In the transmitting optical system of lidar, the smaller the divergence angle of the output beam, the higher the angular resolution, but the larger the focal length of the corresponding transmitting optical system, which will lead to the increase...

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Problems solved by technology

[0003] In the transmitting optical system of lidar, the smaller the divergence angle of the output beam, the higher the angular resolution, but the larger the focal length of the corresponding transmitting optical system, which will lead to the increase of the length and cost of the transmitting optical system. It is not conducive to the development trend of lidar miniaturization and low cost

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