A high-precision positioning system and method for a large-aperture mirror

Abstract

The invention discloses a high-precision positioning system and method for a large-aperture reflector. The positioning system comprises a reflecting mirror assembly, a mirror base assembly, a reflecting mirror support used for installing the reflecting mirror assembly, a multi-degree-of-freedom platform used for adjusting the position of the mirror base assembly and a controller. The controller isused for controlling the freedom degree platform to move according to the position information of the reflecting mirror assembly, the mirror base assembly and the multi-freedom-degree platform so asto drive the mirror base assembly to move to a target position. According to the high-precision positioning system for the large-aperture reflector, multi-degree-of-freedom linkage adjustment can be achieved through the multi-degree-of-freedom platform, the adjustment precision of the position of the reflector base is improved, and then the measurement and positioning precision is improved.

Description

technical field [0001] The invention relates to the field of large-diameter self-adaptive optical imaging detection, in particular to a high-precision positioning system and method for a large-diameter mirror. Background technique [0002] The imaging of a large-aperture telescope depends on the diffraction limit of the system and the seeing degree of the observation environment, and the diffraction limit depends on the mirror surface shape of each mirror and transmission mirror group of the telescope system. The position accuracy of the support structure has a great influence on the mirror surface shape of the telescope mirror, so the position of the mirror must be adjusted. The traditional measurement methods, the measurement accuracy of the adjustment mechanism, and the adjustment accuracy are usually at the submillimeter level. [0003] In the prior art, the dial gauge measurement method is generally used, which can only obtain the in-plane position of the reflector, but...

AI Technical Summary

Problems solved by technology

The position accuracy of the support structure has a great influence on the mirror surface shape of the telescope mirror, so the position of the mirror must be adjusted. The traditional measurement methods, the measurement accuracy of the adjustment mechanism, and the adjustment accuracy are usually at the submillimeter level

[0003] In the existing technology, the dial gauge measurement method is generally used, which can only obtain the in-plane position of the mirror, but cannot obtain its spatial position, and the measurement information is not complete

Moreover, the adjusting nuts used in the prior art also have the disadvantages of backlash, insufficient precision, coupling in multiple directions, and unfavorable convergence after repeated adjustments

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