Effect of axial temperature difference on imaging quality of space remote sensor optical system

WANG Hong; TIAN Tie-yin

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Effect of axial temperature difference on imaging quality of space remote sensor optical system

Article | 更新时间：2020-08-12

- Effect of axial temperature difference on imaging quality of space remote sensor optical system
- Optics and Precision Engineering Vol. 15, Issue 10, Pages: 1489-1494(2007)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH703;TP732
- Received：13 February 2007，
  
  Revised：13 July 2007，
  
  Published Online：30 October 2007，
  
  Published：30 October 2007
- 稿件说明：
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王红,田铁印. 轴向温差对空间遥感器光学系统成像质量的影响[J]. 光学精密工程, 2007,15(10):1489-1494

WANG Hong, TIAN Tie-yin. Effect of axial temperature difference on imaging quality of space remote sensor optical system[J]. Optics and precision engineering, 2007, 15(10): 1489-1494.
王红,田铁印. 轴向温差对空间遥感器光学系统成像质量的影响[J]. 光学精密工程, 2007,15(10):1489-1494 DOI：

WANG Hong, TIAN Tie-yin. Effect of axial temperature difference on imaging quality of space remote sensor optical system[J]. Optics and precision engineering, 2007, 15(10): 1489-1494. DOI：

摘要

利用有限元分析计算了轴向温差对主、次镜面形的影响

对光学系统成像质量进行了评价。用PATRAN软件建立有限元模型

用NASTRAN/NT有限元分析软件完成温度场的分析计算。用Zernike多项式曲面拟合系数表示轴向温差对主、次镜面形的影响

通过ZEMAX软件分析对光学系统成像质量的影响

实现了热分析与光学分析的接口。结果表明:轴向温差不仅使光学系统产生像面位移—离焦

而且将产生各种像差

降低光学系统的成像质量

所以在调焦的同时

必须采取温控措施。最后给出了轴向温差具体的温控指标

主镜的轴向温差为0.8 ℃

次镜为1.0 ℃

主、次镜之间为3.0 ℃。

Abstract

The Finite Element Analysis(FEA) method is used in thermal analysis on axial temperature difference effects on the imaging quality of space remote sensor optical system

and deformations of Primary Mirror(PM) surface and Second Mirror(SM) surface. The FEA model was set up by PATRAN software

and temperature distribution calculation was completed by NASTRAN/NT software. The thermal elasticity deformations of main surfaces were expressed in Zernike polynomial and the analysis results were computed by ZEMAX optical design software to carry out the interface between the thermal analysis and the optical analysis. The results show that the axial temperature difference not only brings the defocus

but also effects on the image quality of the optical system. So temperature control is needed in focusing.Finally

this paper suggests that the axial temperature difference requirement of the PM is 0.8 ℃

the SM is 1.0 ℃

and between PM and SM is 3.0 ℃.

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Related Institution

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