Precision determination method for angle between optical axis and mechanical axis of optical system

Abstract

The invention relates to an accurate measuring method for angle between optical axis and mechanical axis in optical system, belonging to the measuring technology field for angle between optical axis and mechanical axis in optical system. The purpose is that the problem that angle between optical axis and mechanical axis in satellite optical communication system can not be measured accurately in prior technology is solved. Firstly, interferometer (1) is used to adjust the optical axis of high-accuracy plane mirror (3) to coincide with the optical axis of measured optical system (2). Secondly, autocollimator (4) is used to measure the angle alpha of the optical axis and the optical axis of high-accuracy plane mirror (3). Thirdly, autocollimator (4) is used to measure the angle beta of the optical axis and the optical axis of the second high-accuracy plane mirror on mechanical base plane of measured optical system (2). Finally, according to the formula of Delta = beta - alpha the angle Delta between the optical axis and the mechanical axis is calculated. The invention can measure the angle of optical axis and mechanical axis of satellite optical communication system accurately. The measuring accuracy of angle between the optical axis and the mechanical axis is 0.2 mu rad.

Description

technical field [0001] The invention relates to the technical field of measuring the angle between an optical axis and a mechanical axis in an optical system. Background technique [0002] The optical devices in the optical system need to be supported by a mechanical structure. Due to the large difference in the processing accuracy of the optical device and the mechanical structure, there is an angular deviation between the optical axis and the mechanical axis of the optical system. Most optical systems are not critical about the angular difference between the optical axis and the mechanical axis, and do not need to measure the difference. However, in the satellite optical communication system, the angle between the optical axis and the mechanical axis needs to be strictly and accurately measured, and there is currently no way to measure it. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing technology cannot ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing technology cannot strictly and accurately measure the angle between the optical axis and the mechanical axis in the satellite optical communication system, and then provide a kind of angle between the optical axis and the mechanical axis in the optical system Accurate measurement method of included angle

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