Research on the field corrector design for the R-C system of the large telescope Cassegrain focus

PAN Jun-hua

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Research on the field corrector design for the R-C system of the large telescope Cassegrain focus

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- Research on the field corrector design for the R-C system of the large telescope Cassegrain focus
- Optics and Precision Engineering Vol. 10, Issue 3, Pages: 231-234(2002)
- 作者机构：
  
  苏州大学, 现代光学技术研究所,江苏苏州,215006
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH703
- Received：24 February 2002，
  
  Revised：18 March 2002，
  
  Published Online：15 June 2002，
  
  Published：15 June 2002
- 稿件说明：
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潘君骅. 关于大望远镜卡焦R-C系统视场改正镜设计的研究[J]. 光学精密工程, 2002,(3): 231-234

PAN Jun-hua. Research on the field corrector design for the R-C system of the large telescope Cassegrain focus[J]. Editorial Office of Optics and Precision Engineering, 2002,(3): 231-234
潘君骅. 关于大望远镜卡焦R-C系统视场改正镜设计的研究[J]. 光学精密工程, 2002,(3): 231-234 DOI：

PAN Jun-hua. Research on the field corrector design for the R-C system of the large telescope Cassegrain focus[J]. Editorial Office of Optics and Precision Engineering, 2002,(3): 231-234 DOI：

摘要

研究了大望远镜卡焦R-C系统视场改正透镜的设计.以2米级口径的望远镜为例

卡氏焦点的焦比为F/9

采用F/3、F/2.5、F/2及F/1.5四种主镜焦比

得到各自的优化结果.其最大像斑尺寸分别为0″.290

0″.418

0″.934及1″.784.研究结果表明

卡焦R-C系统视场改正镜设计的难度取决于主镜的焦比

主镜焦比在F/3左右是很容易设计好的

而若小于F/2.5

则设计难度增加很快.

Abstract

The R-C system of Cassegrain focus needs a corrector for extending the effective field with good image quality. The restuls of optimization sensitively depends on the focal ratio of the primary mirror of the telescope. Four sets of correctors were designed for various F/# of the primary mirror of a 2-meter telescope:F/3

F/2.5

F/2 and F/1.5. The optimized spots of each corrector are:0.29

0.418

0.934 and 1 784 arcsec

respectively. The conclusion is that for the F/3 primary it is very easy to design the field corrector

but if the primary F/# goes down to F/2.5

the corrector should be more complicated than to use two elements.

关键词

Keywords

references

潘君骅.光学非球面的设计、加工与检验[M].北京:科学出版社,1994.

Wynne C G. Field correctors for large telescopes[J] Appl. Opt. 1965,4(9):1185.

Schulte D H.Auxiliary optical systems for the kitt peak telescopes[J].Appl. Opt, 1963,2(2):141-152.

Rosin S.Corrected cassegrain system[J].Appl. Opt, 1964,3(1):151-156.

Schulte D H. Anastigmatic cassegrain type telescope[J].Appl. Opt,1966,5(2):309-312.

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