Active optics figure control of segmented mirror

LIN Xu-dong; CHEN Tao; WANG Jian-li; WANG Fu-guo

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Active optics figure control of segmented mirror

Article | 更新时间：2020-08-12

- Active optics figure control of segmented mirror
- Optics and Precision Engineering Vol. 17, Issue 1, Pages: 98-103(2009)
- 作者机构：
  
  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. 中国科学院研究生院,北京 100039
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH75
- Received：21 August 2008，
  
  Revised：15 October 2008，
  
  Published Online：25 January 2009，
  
  Published：25 January 2009
- 稿件说明：
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林旭东, 陈涛, 王建立, 王富国. 拼接镜的主动光学面形控制[J]. 光学精密工程, 2009,17(1): 98-103

LIN Xu-dong, CHEN Tao, WANG Jian-li, WANG Fu-guo. Active optics figure control of segmented mirror[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 98-103
林旭东, 陈涛, 王建立, 王富国. 拼接镜的主动光学面形控制[J]. 光学精密工程, 2009,17(1): 98-103 DOI：

LIN Xu-dong, CHEN Tao, WANG Jian-li, WANG Fu-guo. Active optics figure control of segmented mirror[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 98-103 DOI：

摘要

为了实现对拼接式望远镜各子镜的主动控制

建立了正六边形子镜拼接的面形控制方程

并研究了传感器的安装位置对面形控制的影响。根据子镜之间相对位置的测量要求确定了主动控制所采取的方式

建立了由3个正六边形子镜组成的拼接镜的面形控制方程

并分析了传感器的安装位置对面形控制的影响。提出了传感器沿垂直镜缝方向错位安装的方法

分析了该方法对于拼接子镜扩展的适用性。分析表明

对于边长0.9 m

对角线长1.8 m的子镜

传感器错开0.02 m安装即能够准确检测子镜之间的位置变化;给出了正确的促动器调整信息

满足了拼接镜主动面形实时、高精度控制等要求。

Abstract

To realize the active control of each segment of a segmented telescope

the figure control equation of hexagonal mirrors was built up

and the impact of sensor location on figure control system was studied. A working manner of the active control system based on the measurement requirements of relative segment locations was confirmed. Then

a figure control system consisting of 3 segments was built up

and the influence of the sensor location on figure control was analyzed.And also

a sensor setting scheme in which sensor is perpendicularly away in centimeters was put forward. Finally

the applicability of this scheme to the extent of segmented mirrors was testified. The analysis results indicate that the change of location between the mirrors can be exactly measured in fixed two sensors with 0.02 m stagger along the same gap when the segment mirror has side length of 0.9 m and diagonal length of 1.8 m

also the control system can give out the correct adjusted information of actuators. These conclutions reported here show that proposed scheme can satisfy the requirements of real time and high precise control of the active figure of the segmented mirror.

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Keywords

references

MAST T S, NELSON J E. Figure control for a fully segmented telescope mirror [J]. Appl. Opt.,1982,21(14):2631–2641.[2] 苏定强,崔向群. 主动光学——新一代大型望远镜的关键技术[J]. 天文学进展,1999,17(1):1-14. SU D Q, CUI X Q. Active optics——the key technology for new generation big aperture telescopes [J]. Progress in Astronomy. 1999, 17(1): 1-14.(in Chinese)[3] MINOR R H,ARTHUR A A,GABOR G,et al.. Displacement sensors for the primary mirror of the W.M. Keck telescope .SPIE,1990,1236,Advanced Technology Optical Telescopes Ⅳ:1009-1017.[4] 邹维曜.大型拼接镜面望远镜的面形控制 . 南京:天文光学技术研究所,1996. ZOU W Y. Figure control of big segmented mirror telescope . Nanjing:Nanjing Institute of Astronomical Optics and Technology,1996. (in Chinese)[5] 程景全.天文望远镜原理和设计[M]. 北京:中国科学技术出版社,2003. CHENG J Q. Principle and Design of Astronomical Telescope [M].Beijing: China Science & Technology Press, 2003.[6] 杨德华,戚永军,朱振东,等. 光学拼接镜面微位移主动调节机构的设计和实测[J]. 光学精密工程,2005,13(2):191-197. YANG D H, QI Y J, ZHU ZH D, et, al.. Design and test of the active micro-motion mechanism for optical mirror segment [J]. Opt. Precision Eng., 2005, 13(2): 191-197. (in Chinese)[7] 刘建芳,杨树臣,杨志刚,等. 新型压电精密步进旋转驱动器研究[J]. 光学精密工程,2006,14(4):594-601. LIU J F, YANG SH CH, YANG ZH G,et al.. Study on precision PZT rotary step actuator with inner anchor/loosen [J].Opt. Precision Eng., 2006, 14(4): 594-601.(in Chinese)

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