A Large Aperture Spherical LiDAR Optical System

Abstract

The invention provides a large-caliber fully-spherical laser radar optical system. All the optical surfaces of the optical system are spherical. A double-focus switching mode is designed. A Margin system adopts a multiple-structure design. Through changing the switching of laser between the output wavelength and the detection wavelength, the front-end Margin system can be used alone and can be self-collimated and detected to form a first focus. The Margin system and a front correction lens group form a beam compression optical system, and the front correction lens group and a rear correction lens group focus a collimating beam at a second focus position. Compared with a traditional transmission type and aspheric system structure, the difficulty in optical lens machining, installing and debugging is reduced greatly, the efficiency of installing and debugging and the imaging quality of the system are improved, the utilization efficiency of received laser echo signals is increased, and the requirement for compact structure and low cost is satisfied. The large-caliber fully-spherical laser radar optical system of the invention is reasonable in structure, easy to produce and assemble, good in extension performance, low in cost, and suitable for mass production.

Description

Technical field [0001] The invention belongs to the field of optomechanical integrated equipment, and specifically relates to a large-caliber global surface lidar optical system. Background technique [0002] Lidar is a kind of optical mechatronic system equipment developed by integrating atmospheric optics, weak signal detection, laser and other technologies. Its working principle is that the laser source emits a laser beam to the target area, after detecting the reflection or scattering of the target, and then receives the laser echo signal returned from the target and compares the emitted laser signal and performs appropriate processing to obtain the target's Related information, such as the target's distance, azimuth, speed, attitude, and even surface shape and other parameters, so as to detect, track and identify aircraft, missiles and other targets. In recent years, lidar has been widely used in laser navigation, laser ranging, atmospheric monitoring, tracking recognition,...

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Problems solved by technology

[0008] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a large-aperture spherical laser radar optical system, which is used to solve the problems of the laser radar optical system in the prior art, such as uncompact structure, axial spherical aberration of the correction system, Problems of low resolution, poor imaging quality, difficult optical surface processing, difficult assembly and low precision

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