Telescope alignment based on the structured lighting of collimated laser beam bundles

Zhengyang Li; Xin Jiang; Yiming Zhang; Yong Xia; Zijian Han; Rongxin Tang; Zhixu Wu; Xiangyan Yuan

doi:10.1117/12.2637084

29 August 2022 Telescope alignment based on the structured lighting of collimated laser beam bundles

Zhengyang Li, Xin Jiang, Yiming Zhang, Yong Xia, Zijian Han, Rongxin Tang, Zhixu Wu, Xiangyan Yuan

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 1218860 (2022) https://doi.org/10.1117/12.2637084
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The telescope's image quality will deteriorate dramatically when the sensitive optical components are misaligned. Therefore, a dynamic interferometer or star simulator is usually used to measure the misalignment information of the sensitive optical components, which can guide the calibration of these misalignments. In this work, we proposed a new alignment method that the pupil of the telescope is structurally illuminated by a bundle of collimated laser beams firstly, then the low order aberrations of coma and astigmatism generated by the misalignments are calculated by the deformed pattern of the laser beams which are recorded by the CCD at the position of in-focus and out-focus, the misalignment information can be inversely calculated by these aberrations and the telescope can be calibrated by the misalignment information. Compared to the existing alignment method, this technology can significantly decrease the requirements of precision measuring instruments or standard star points, etc., and can be used in the alignments of the telescope with different apertures and different working environments, such as the Antarctica telescope.

Citation Download Citation

Zhengyang Li, Xin Jiang, Yiming Zhang, Yong Xia, Zijian Han, Rongxin Tang, Zhixu Wu, and Xiangyan Yuan "Telescope alignment based on the structured lighting of collimated laser beam bundles", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 1218860 (29 August 2022); https://doi.org/10.1117/12.2637084

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KEYWORDS

Collimation

Telescopes

Collimators

Distortion

Wavefronts

Light sources and illumination

Mirrors

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