Co-focus experiment of segmented mirror

doi:10.1088/1674-1056/26/6/060706

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 60706-060706.doi: 10.1088/1674-1056/26/6/060706

Co-focus experiment of segmented mirror

Bin Li(李斌), Wen-Hao Yu(于文豪), Mo Chen(陈莫), Jin-Long Tang(唐金龙), Hao Xian(鲜浩)

1 Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 The Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

收稿日期:2016-09-26 修回日期:2017-01-10 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: Hao Xian E-mail:xianhao@ioe.ac.cn
作者简介:Bin Li,E-mail:libingioe@126.com
基金资助:
Project supported by the National High Technology Research and Development Program of China.

Co-focus experiment of segmented mirror

Bin Li(李斌)^1,2,3, Wen-Hao Yu(于文豪)^1,2,3, Mo Chen(陈莫)^1,2,3, Jin-Long Tang(唐金龙)^1,3, Hao Xian(鲜浩)^1,3

1 Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 The Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Received:2016-09-26 Revised:2017-01-10 Online:2017-06-05 Published:2017-06-05
Contact: Hao Xian E-mail:xianhao@ioe.ac.cn
Supported by:
Project supported by the National High Technology Research and Development Program of China.

摘要/Abstract

摘要： In this paper, an active optics and co-focus experimental system of segmented mirror is built. Firstly, a support structure of segmented mirror is designed and it is verified by simulation to meet the requirement for the experimental system of segmented mirror. In this system, the large de-focus and tilt/tip errors of the segmented mirror are adjusted by observing the density and contrast of interference fringes based on isoclinic interference theory until the defocus and tilt/tip errors are in the detective range of the Shack-Hartmann. Then, the Shack-Hartmann is used to measure them and they are adjusted by actuators. The actuators are controlled by active optics to realize the closed-loop adjustment and maintenance for fine co-focus of segmented mirror. And the interference fringes are utilized to verify the detective precision of Shack-Hartmann. After the co-focus fine-tuning of the segmented mirror, the tilt/tip residual surface error is better than 0.01λ RMS; the defocus residual surface error is better than 0.01λ RMS.

关键词: telescope, active or adaptive optics, astronomical, image analysis

Abstract: In this paper, an active optics and co-focus experimental system of segmented mirror is built. Firstly, a support structure of segmented mirror is designed and it is verified by simulation to meet the requirement for the experimental system of segmented mirror. In this system, the large de-focus and tilt/tip errors of the segmented mirror are adjusted by observing the density and contrast of interference fringes based on isoclinic interference theory until the defocus and tilt/tip errors are in the detective range of the Shack-Hartmann. Then, the Shack-Hartmann is used to measure them and they are adjusted by actuators. The actuators are controlled by active optics to realize the closed-loop adjustment and maintenance for fine co-focus of segmented mirror. And the interference fringes are utilized to verify the detective precision of Shack-Hartmann. After the co-focus fine-tuning of the segmented mirror, the tilt/tip residual surface error is better than 0.01λ RMS; the defocus residual surface error is better than 0.01λ RMS.

Key words: telescope, active or adaptive optics, astronomical, image analysis

中图分类号: (Optical instruments and equipment)

07.60.-j

07.60.Ly (Interferometers) 42.68.Wt (Remote sensing; LIDAR and adaptive systems) 95.55.Cs (Ground-based ultraviolet, optical and infrared telescopes)

李斌, 于文豪, 陈莫, 唐金龙, 鲜浩. Co-focus experiment of segmented mirror[J]. 中国物理B, 2017, 26(6): 60706-060706.

Bin Li(李斌), Wen-Hao Yu(于文豪), Mo Chen(陈莫), Jin-Long Tang(唐金龙), Hao Xian(鲜浩). Co-focus experiment of segmented mirror[J]. Chin. Phys. B, 2017, 26(6): 60706-060706.

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Co-focus experiment of segmented mirror

Co-focus experiment of segmented mirror

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