Laser radar optical system with optical axis calibrating function and optical axis calibrating method

Abstract

The invention discloses a laser radar optical system with an optical axis calibrating function and an optical axis calibrating method thereof. A laser emission mirror in the optical system is arranged on an adjusting mechanism which has a pitch angle and an azimuth angle being adjustable accurately and is locked; a retroreflection mirror group is arranged on the outer sides of the laser emission mirror and a signal receiving optical part; and a lighting source is arranged on the outer side between a field diaphragm and a relay lens group. The central position of the field diaphragm representing a laser signal receiving optical axis and the laser far-field spot position representing a laser emission optical axis are successively imaged into a CCD (charge coupled device) camera for detecting a target picture through utilizing a retroreflection characteristic of a pyramid prism in the retroreflection mirror group. The laser emission mirror is adjusted, so that the two positions are coincided in the CCD camera to complete optical axis calibration. The calibrating method disclosed by the invention has high accuracy, is simple to operate, does not rely on an external auxiliary assembly,and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of laser radar optical devices, and in particular relates to a laser radar optical system with an optical axis calibration function and an optical axis calibration method. It is used for laser transmitting and receiving optical systems such as lidar and laser ranging. Background technique [0002] During the working process of the laser radar optical system, the laser beam is transmitted to the target, and the reflected signal of the target to the laser is received at the same time. The system needs to have the ability to use the CCD camera to image and detect the target. One of the important technical requirements is to ensure the consistency of the laser emission optical axis, the laser signal receiving optical axis, and the target imaging aiming optical axis. The optical axis calibration of the existing laser radar optical system to ensure the consistency of the optical axis mostly needs to be carried ou...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art that laser radar optical system optical axis calibration needs an external auxiliary device and complicated operation, the purpose of the present invention is to provide a laser radar optical system with optical axis calibration function; another purpose of the present invention is to provide Optical axis calibration method of laser radar optical system with optical axis calibration function

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