基于标准化点源敏感性的镜面视宁度评价

杨飞; 安其昌

doi:10.3788/OPE.20162405.0979

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基于标准化点源敏感性的镜面视宁度评价

现代应用光学 | 更新时间：2020-08-13

- 基于标准化点源敏感性的镜面视宁度评价
- Evaluation of mirror seeing based on PSSn
- 光学精密工程 2016年24卷第5期页码：979-985
- 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,中国,130033
  2. 中国科学院大学北京,100049
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.11403022)();中国科学院青年创新促进会(No.2016198)()
- DOI：10.3788/OPE.20162405.0979
  中图分类号： TH751
- 收稿日期：2015-10-29，
  
  修回日期：2015-12-07，
  
  纸质出版日期：2016-05-25
- 稿件说明：
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杨飞, 安其昌,. 基于标准化点源敏感性的镜面视宁度评价[J]. 光学精密工程, 2016,24(5): 979-985

YANG Fei, AN Qi-chang,. Evaluation of mirror seeing based on PSSn[J]. Editorial Office of Optics and Precision Engineering, 2016,24(5): 979-985
杨飞, 安其昌,. 基于标准化点源敏感性的镜面视宁度评价[J]. 光学精密工程, 2016,24(5): 979-985 DOI： 10.3788/OPE.20162405.0979.

YANG Fei, AN Qi-chang,. Evaluation of mirror seeing based on PSSn[J]. Editorial Office of Optics and Precision Engineering, 2016,24(5): 979-985 DOI： 10.3788/OPE.20162405.0979.

摘要

考虑光学望远镜系统的设计和配备与镜面视宁度相关

本文引入了标准化点源敏感性(PSSn)来改善传统评价手段的局限性

以实现镜面视宁度的全频域内评价。介绍了镜面视宁度的概念以及各大口径望远镜对镜面视宁度的检测与评价方法

同时指出了之前使用的评价指标与评价方法的缺点不足。基于30 m望远镜研究团队所提出的全频域评价指标--标准化点源敏感性(PSSn)提出了新的评价方法。分析了PSSn的特性

并利用其良好的合成特性以及不同的曝光函数

得到了不同曝光条件以及视宁条件下的PSSn表达式。最后

利用在大口径波前上随机选取子孔径的方法

模拟了冻结湍流假设下的镜面视宁情况

并对其PSSn的变化进行了估计

验证了本文方法的可行性。基于本文所提出的对于镜面视宁度的评价与分析

系统工程师可以全面客观地评价大口径系统的镜面视宁度

结合PSSn的优良合成特性建立合理的误差树

有效提高匹配精度

降低系统建造成本。

Abstract

As the design and assembly of optical systems in an optical telescope with large aperture mirrors are related to the mirror seeing

this paper introduces the normalized point source sensitivity (PSSn) to improve the limitation of traditional evaluation method and to realize the evaluation of mirror seeing in all frequencies. The concepts of the mirror seeing and its detection and evaluation methods were introduced and the shortcomings of the traditional evaluation methods and evaluation factors were pointed out. The evaluation index PSSn proposed by the 30 m large aperture telescope research group was introduced the new evaluation method. The PSSn properties were analyzed

and the expressions of the PSSn in different exposure conditions and seeing conditions were obtained based on the multiplication property and exposure conditions of the PSSn. The calculation procedure was given by considering the shutter time

mirror figure and atmosphere turbulence. Finally

with the help of random selection of sub-aperture on a large aperture wavefront

the frozen turbulence was used to generate the simulated seeing condition over the mirror surface. The evaluation procedure was verified by this simulation. Based on the evaluation and analysis method presented in this paper

the system engineers could evaluate the mirror seeing for the large aperture optical system more objectively

and could build the error budget tree more reasonably to decrease the cost of the optical system.

关键词

Keywords

references

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