基于Hexapod平台的地基大型光学望远镜失调误差主动补偿

曹玉岩; 王建立; 陈涛; 吕天宇; 王洪浩; 张岩; 王富国

doi:10.37188/OPE.20202811.2452

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基于Hexapod平台的地基大型光学望远镜失调误差主动补偿

微纳技术与精密机械 | 更新时间：2020-12-09

- 基于Hexapod平台的地基大型光学望远镜失调误差主动补偿
- Active compensation of aberration for large ground-based telescope based on Hexapod platform
- 光学精密工程 2020年28卷第11期页码：2452-2465
- 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.中国科学院大学, 北京 100049
- 作者简介：
  
  [ "曹玉岩(1986-)，男，吉林大安人，博士研究生，副研究员，2012年于西安电子科技大学获得硕士学位，主要从事地基大型光学望远镜系统集成仿真模拟方面的研究。E-mail：yuyan_cao@126.com" ]
  [ "王建立(1971-)，男，山东曲阜人，研究员，博士生导师，主要从事空间探测技术和地基高分辨率成像光电望远镜总体技术的研究。E-mail：wangjianli@ciomp.ac.cn" ]
- 基金信息：
  
  国家自然科学基金资助项目(11803035);国家自然科学基金资助项目(U2031126)
- DOI：10.37188/OPE.20202811.2452
  中图分类号： TP273;TH703
- 收稿日期：2020-07-08，
  
  修回日期：2020-07-24，
  
  录用日期：2020-7-24，
  
  纸质出版日期：2020-11-25
- 稿件说明：
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曹玉岩, 王建立, 陈涛, 等. 基于Hexapod平台的地基大型光学望远镜失调误差主动补偿[J]. 光学精密工程, 2020,28(11):2452-2465.

Yu-yan CAO, Jian-li WANG, Tao CHEN, et al. Active compensation of aberration for large ground-based telescope based on Hexapod platform[J]. Optics and precision engineering, 2020, 28(11): 2452-2465.
曹玉岩, 王建立, 陈涛, 等. 基于Hexapod平台的地基大型光学望远镜失调误差主动补偿[J]. 光学精密工程, 2020,28(11):2452-2465. DOI： 10.37188/OPE.20202811.2452.

Yu-yan CAO, Jian-li WANG, Tao CHEN, et al. Active compensation of aberration for large ground-based telescope based on Hexapod platform[J]. Optics and precision engineering, 2020, 28(11): 2452-2465. DOI： 10.37188/OPE.20202811.2452.

摘要

随望远镜口径的不断增大，其结构和热变形所导致的光学系统失调而造成图像质量下降问题越来越显著。为了估计望远镜的失调误差，建立结构力学模型，并对失调误差计算方法及补偿进行研究。对望远镜结构进行简化并采用有限元方法建立结构力学模型。然后，以望远镜主次镜镜面节点的当前位置为输入，提出了基于非线性最小二乘拟合的主次镜失调误差计算方法。以主镜当前光轴为基准，以补偿失调误差为目标，即主次镜光轴重合且无间隔误差，提出了基于空间坐标变换来确定Hexapod平台支杆长度的计算方法。以2 m口径望远镜为例，对重力及热变形所致的失调误差进行模拟，并在此基础上利用Hexapod平台调整次镜位置来补偿失调误差。数值仿真结果表明：重力变形和热变形均会导致光学系统出现明显的失调误差，弥散斑最大达到了1 473

m和557

m，经过次镜位置补偿，弥散斑半径下降到32

m以下。本文提出的失调误差以及Hexapod平台支杆长度计算方法可应用于实际望远镜标定和装调过程中。

Abstract

As the diameter of a ground-based telescope increases

the image quality will significantly degrade because of optical misalignment

which is caused by gravity and thermal deformations of the telescope structure. To accurately estimate the misalignment error

a mechanical model of a telescope was established

and the computation method and compensation process were investigated. According the structural components of the telescope

the structural model was simplified

and then the mechanical model was established using the finite element method. Based on nonlinear least square fitting

a method was presented to compute the misalignment error between the primary and secondary mirrors in which the inputs were the current node position of the primary and secondary mirror surfaces. Thereafter

a method in which the optical axis of the primary mirror used as the benchmark were adopted to determine the length of the hexapod leg with the objective of compensating for the misalignment error. Finally

numerical examples of a ground-based telescope with a diameter of 2 m were presented to verify the presented methods and the corresponding theories. The simulation results show that there are obvious misalignment errors because of gravity and thermal deformations

with maximum root mean square (RMS) radii of the optical spots being 1 473 and 557

respectively. After the secondary mirror compensation

the RMS radii of the spots are decreased significantly

with all of them being

m. The results verify the misalignment error and the hexapod leg length computation methods.

关键词

Keywords

references

P Y BELY . The Design and Construction of Large Optical Telescopes , : New York Springer , 2003 .

R N WILSON , F FRANZA , L NOETHE , 等 . Active optics IV: set-up and performance of the optics of the ESO New Technology Telescope (NTT) in the observatory . J. Mod. Opt. , 1991 . 38 219 - 243 . DOI: 10.1080/09500349114550271 http://doi.org/10.1080/09500349114550271 .

S GUISARD , L NOETHE , J SPYROMILIO . Performance of active optics at the VLT . SPIE , 2000 . 4003 154 - 164 . http://spie.org/Publications/Proceedings/Paper/10.1117/12.391506 http://spie.org/Publications/Proceedings/Paper/10.1117/12.391506 .

F BORTOLETTO , D FANTINEL , R RAGAZZONI , 等 . Active optics handling inside Galileo Telescope . SPIE , 1994 . 2199 212 - 222 . http://spie.org/Publications/Proceedings/Paper/10.1117/12.176191 http://spie.org/Publications/Proceedings/Paper/10.1117/12.176191 .

P SCHIPANI , S D'ORSI , D FIERRO , 等 . Active optics control of VST telescope secondary mirror . Applied Optics , 2010 . 49 ( 16 ): 3199 - 3207 . DOI: 10.1364/AO.49.003199 http://doi.org/10.1364/AO.49.003199 .

P SCHIPANI , L MARTY . Hexapod platform kinematics and secondary mirror aberration control . SPIE , 2006 . 6273 62733B http://www.zhangqiaokeyan.com/academic-conference-foreign_optomechanical-technologies-for-astronomy-pt2_thesis/020512159191.html http://www.zhangqiaokeyan.com/academic-conference-foreign_optomechanical-technologies-for-astronomy-pt2_thesis/020512159191.html .

C PERNECHELE , F BORTOLETTO , K REIF . Position control for active secondary mirror of a two-mirror telescope . SPIE , 1997 . 3112 172 - 180 . http://spie.org/Publications/Proceedings/Paper/10.1117/12.278821 http://spie.org/Publications/Proceedings/Paper/10.1117/12.278821 .

P SCHIPANI , F PERROTTA , C MOLFESE , 等 . The VST secondary mirror support system . SPIE , 2008 . 7018 701845 http://spie.org/Publications/Proceedings/Paper/10.1117/12.787925 http://spie.org/Publications/Proceedings/Paper/10.1117/12.787925 .

P SCHIPANI , S D'ORSI , D FIERRO , 等 . Performance of the VST secondary mirror support system . SPIE , 2010 . 7739 773932 http://spie.org/x648.xml?product_id=856606 http://spie.org/x648.xml?product_id=856606 .

T E PICKERING , S C WEST , D G FABRICANT . Active supports andwavefront sensing at the upgraded 6.5 meter MMT . SPIE , 2004 . 5489 1041 - 1051 . http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=847396 http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=847396 .

杨维帆 , 曹小涛 , 张彬 , 等 . 空间望远镜次镜六自由度调整机构精密控制 . 红外与激光工程 , 2018 . 47 ( 7 ): 241 - 248 .

W F YANG , X T CAO , B ZHANG , 等 . Six degree of freedom precision control for space camera secondary mirror adjusting mechanism . Infrared and Laser Engineering , 2018 . 47 ( 7 ): 241 - 248 .

邓赛 , 景奉水 , 梁自泽 , 等 . FAST馈源支撑系统位姿分配方法研究 . 光学精密工程 , 2017 . 25 ( 2 ): 375 - 384 . http://ope.lightpublishing.cn/thesisDetails?columnId=1451092&Fpath=&index=-1&l=zh http://ope.lightpublishing.cn/thesisDetails?columnId=1451092&Fpath=&index=-1&l=zh .

S DENG , F SH JING , Z Z LING , 等 . Research on pose distribution algorithm of FAST feed support system . Opt. Precision Eng. , 2017 . 25 ( 2 ): 375 - 384 . http://ope.lightpublishing.cn/thesisDetails?columnId=1451092&Fpath=&index=-1&l=zh http://ope.lightpublishing.cn/thesisDetails?columnId=1451092&Fpath=&index=-1&l=zh .

邵亮 , 杨飞 , 王富国 , 等 . 1.2 m轻量化SiC主镜支撑系统优化设计 . 中国光学 , 2012 . 5 ( 3 ): 229 - 234 .

L SHAO , F YANG , F G WANG , 等 . Design and optimization of supporting system for 1.2 m light weight SiC primary mirror . Chinese Optics , 2012 . 5 ( 3 ): 229 - 234 .

邵亮 , 吴小霞 , 明名 , 等 . 大口径SiC轻量化反射镜柔性带式支撑静摩擦影响 . 光学精密工程 , 2017 . 25 ( 9 ): 2387 - 2395 . http://ope.lightpublishing.cn/thesisDetails?columnId=1450021&Fpath=&index=-1&l=zh http://ope.lightpublishing.cn/thesisDetails?columnId=1450021&Fpath=&index=-1&l=zh .

L SHAO , X X WU , M MING , 等 . Influence of static friction for large aperture SiC light weight reflecting mirror with flexible strip support . Opt. Precision Eng. , 2017 . 25 ( 9 ): 2387 - 2395 . http://ope.lightpublishing.cn/thesisDetails?columnId=1450021&Fpath=&index=-1&l=zh http://ope.lightpublishing.cn/thesisDetails?columnId=1450021&Fpath=&index=-1&l=zh .

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