基于曲率传感的主焦巡天望远镜集成检测方法

安其昌; 吴小霞; 李洪文; 蔡雨岐

doi:10.37188/CO.2023-0010

基于曲率传感的主焦巡天望远镜集成检测方法

doi: 10.37188/CO.2023-0010

安其昌^{1, 2, ,},
吴小霞^{1, 2},
李洪文^{1, 2},
蔡雨岐³

1.
中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
2.
吉林省智能波前传感与控制重点实验室, 吉林长春 130033
3.
哈尔滨工业大学, 黑龙江哈尔滨150001

基金项目: 国家自然科学基金项目（No. 62005279, No. 12133009）；中国科学院青年创新促进会（No. 2020221）；吉林省科技发展计划（No. 20220402032GH）

详细信息

作者简介:
安其昌（1988—），男，山西太原人,博士，副研究员，中国科学院青促会会员。2011年于中国科学技术大学获得工学学士学位，2018 年于中国科学院大学获得博士学位，现任职于中国科学院长春光机所，研究方向为大口径光机系统检测装调。E-mail：anjj@mail.ustc.edu.cn

中图分类号: TH751
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出版历程
- 收稿日期: 2023-01-06
- 修回日期: 2023-02-05
- 网络出版日期: 2023-04-18

Assembling and test method for main focus survey telescope based on curvature sensing

AN Qi-chang^{1, 2
, ,},
WU Xiao-xia^{1, 2},
LI Hong-wen^{1, 2},
CAI Yu-qi³

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
Jilin Provincial Key Laboratory of Intelligent Wavefront Sensing and Control, Changchun 130033, China
3.
Harbin Institute of Technology, Harbin 150001, China

Funds: Supported by the National Natural Science Foundation of China (No. 62005279, No. 12133009); the Youth Innovation Promotion Association of CAS (No. 2020221); Jilin Science and Technology Development Program (No. 20220402032GH)

More Information

Corresponding author: anjj@mail.ustc.edu.cn

摘要

摘要:
通过对望远镜进行曲率波前感知，以更好地实现主焦巡天望远镜的集成检测。首先，利用傅立叶光学理论分析了主焦巡天望远镜曲率传感过程以及多环节动态稳定性传递基本原理。其次，对主焦巡天望远镜集成检测中的静态校正与动面形测量过程进行误差分析。然后，分析了调节过程中的自由度锁定。最后，通过实验实现了集成检测过程的原理贯通。所获得的波前探测残差优于0.08λ(λ=633 nm)。空间分辨率为0.1 m，时间分辨率为0.2 Hz。本方法可有效提升主焦点大口径大视场望远镜的成像质量，利用曲率传感非干涉、高鲁棒的特点，降低了集成检测过程对外界环境稳定性的需求，为未来更加精细的时域天文学观测提供助力。
- 曲率传感 /
- 波前像差 /
- 主焦巡天望远镜 /
- 集成检测
Abstract:
The integrated detection of the main focus telescope is realized by sensing the curvature wavefront of the telescope. First of all, the curvature sensing process of the main focus telescope and the basic principle of dynamic stability transfer in multiple links are analyzed using Fourier optics theory. Secondly, the error analysis of static correction and dynamic surface shape measurement in the integrated detection of the main focus telescope is carried out. After that, the degree of freedom locking in the adjustment process is analyzed. Finally, the principle of the integrated detection process is realized through experiments. The obtained wavefront detection residual is better than 0.08λ( λ=633 nm). The spatial resolution is 10/m⁻¹, and the temporal resolution is 0.2 Hz. This method can effectively improve the imaging quality of main focus telescope with the large-aperture large-field, and reduce the demand for the stability of the external environment in the integrated detection process by using the non-interference and high robustness characteristics of the curvature sensor, so as to provide assistance for the more detailed time-domain astronomical observation in the future.
- curvature sensing /
- wavefront aberration /
- main focus telescope /
- integrated detection

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图 1 曲率传感原理图

Figure 1. Schematic diagram of curvature sensing

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图 2 波前传感测量的时间和空间分辨率

Figure 2. Time and spatial resolution of wavefront sensor measurement

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图 3 波前复原精度验证实验结果。（a）焦前光强分布；（b）焦后光强分布；（c）重建波前；（d）原始波前

Figure 3. Wavefront restoration accuracy verification experiment results. (a) Pre-focal light intensity distribution; (b) light intensity distribution of extra focus; (c) reconstructed wavefront; (d) original wavefront

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图 4 1-μm抖动影响下的波前感知情况。（a）焦前光强分布；（b）焦后光强分布；（c）重建波前；（d）多色重建波前与单色原始波前结果对比

Figure 4. Wavefront perception under the influence of 1-μm Jitter. (a) Pre-focal light intensity distribution; (b) light intensity distribution of extra focus; (c) reconstructed wavefront; (d) comparison of reconstructed wavefront and original wavefront

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图 5 绕偏置点旋转下的离焦星点像与系统波前。（a）第一次修正离焦星点像；（b）第二次修正离焦星点像；（c）第三次修正离焦星点像；（d）第一次修正系统波前；（e）第二次修正系统波前；（f）第三次修正系统波前

Figure 5. The defocus donut and system wavefront under rotation around the offset point. (a) First corrected defocus donut; (b) second corrected defocus donut; (c) third corrected defocus donut; (d) first corrected system wavefront; (e) second corrected system wavefront; (f) third corrected system wavefront

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图 6 利用单个透镜的验证平台与验证结果。（a）光路原理图；（b）实验现场图；（c）焦前光强分布；（d）焦后光强分布；（e）波前解算结果；（f）低阶像差估计

Figure 6. Verification platform using single lens and its verification results. (a) Schematic diagram of optical path; (b) experimental set up diagram; (c) inter focus intensity distribution; (d) extra focus intensity distribution; (e) wavefront solution results; (f) low order aberration estimation

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图 7 外场实验验证结果。（a）焦前光强分布；（b）焦后光强分布；（c）波前解算结果

Figure 7. Verification results of field experiment. (a) Intensity distribution of intra focus; (b) intensity distribution of extra focus; (c) wavefront solution results

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