拼接式空间望远镜大范围高精度自动化共相调校

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关键词：空间望远镜；拼接镜；共相调校；色散条纹；位相相异中图分类号：TH751;P111.21 文献标识码：Adoi：10.37188/OPE.20253309.1353 CSTR：32169.14.OPE.20253309.1353

Automated co-phasing alignment for large-scale high-precision in segmented space telescopes

XU Boqian*，JU Guohao，GAO Yan，WANG Shuaihui， ZHANG Chunyue，KUANG Ye，DUYimin，LU Zhirong，XU Shuyan

（Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences， Changchun，Jilin130033，China） *Corresponding author，E-mail：xuboqian@ciomp.ac.cn

Abstract：This paper presents a method for large-range，high-precision，and automated co-phasing alignment of segmented space telescopes. The approach satisfies the demands of millimeter-level range， nanometer-level precision，and operation without reliance on external interferometric measurement devices.Initially，the optical characteristics at various co-phasing stages-confocal alignment，coarse cophasing，and fine co-phasing-are analyzed.Enhancements are made to the confocal alignment method，a coarse co-phasing detection technique based on a dispersion fringe sensor is developed，and a fine cophasing detection method employing phase diversity is introduced. These advancements establish a comprehensive accuracy convergence chain for segmented miror co-phasing alignment. Subsequently，an experimental system is constructed to validate the automated processes of confocal alignment，coarse cophasing，and fine co-phasing.Experimental results demonstrate that when the relative position and orientation errors of sub-mirrors lie within ±0.5mm and ±0.1∘ ，respectively，the proposed method successfully achieves automated co-phasing. Folowing co-phasing，the system attins a Wavefront error RMS better than 0.1λ（ λ=632.8nm ）. The proposed co-phasing method provides a broad alignment range，high accuracy，and low resource consumption，rendering it highly promising for applications in segmented space telescopes.

Key words： space telescope； segmented mirror; co-phasing alignment； dispersed fringe sensor; phase di-versity

1引言

空间天文观测需求牵引着空间望远镜分辨能力、集光能力的逐步提升，空间望远镜光学口径随之逐步增大。（剩余10737字）