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

• GENERAL • 上一篇    下一篇

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. 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. 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: 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)