Research on optical axis self-calibration technology for space laser terminal

This paper presents an optical axis self-calibration technology for laser terminals based on an corner cube reflector and the SPGD algorithm. This technology effectively addresses the problem of optical coaxiality changes and link establishment difficulties in space laser terminals caused by force and thermal deformation. The technology requires minimal modifications to existing laser terminal optical paths, features short calibration time, and achieves high calibration accuracy. The paper introduces the self-calibration optical path design, principles and implementation process of optical axis self-calibration, and the application of the SPGD algorithm in self-calibration process. Through simulation modeling and experimental verification, the paper demonstrates the feasibility and effectiveness of this optical axis self-calibration technology, providing reliable technical support for coaxiality optimization and rapid link establishment of space laser terminals.