Research on Surface Irregularity Influence of On-axis TMA Mirror

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Research on Surface Irregularity Influence of On-axis TMA Mirror

Article | 更新时间：2020-08-12

- Research on Surface Irregularity Influence of On-axis TMA Mirror
- Optics and Precision Engineering Vol. 16, Issue 8, Pages: 1516-1521(2008)
- 作者机构：
  
  长春光机所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP37
- Received：02 June 2008，
  
  Revised：04 June 2008，
  
  Published Online：25 August 2008，
  
  Published：25 August 2008
- 稿件说明：
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钟兴,金光,王栋,阎勇. 共轴TMA反射镜面形不规则影响研究[J]. 光学精密工程, 2008,16(8):1516-1521

Research on Surface Irregularity Influence of On-axis TMA Mirror[J]. Optics and precision engineering, 2008, 16(8): 1516-1521.
钟兴,金光,王栋,阎勇. 共轴TMA反射镜面形不规则影响研究[J]. 光学精密工程, 2008,16(8):1516-1521 DOI：

Research on Surface Irregularity Influence of On-axis TMA Mirror[J]. Optics and precision engineering, 2008, 16(8): 1516-1521. DOI：

摘要

共轴TMA（三反射镜消像散系统）是轻型高分辨空间相机常用的光学系统形式。共轴TMA反射镜一般采用非球面，其面形的不规则主要由环境变化和加工精度造成。面形的环境耐受与具体的结构设计有关，加工的精度又牵涉到周期和成本，因此，在共轴TMA设计中，需要对各种因素综合分析以保证实现光学系统的设计分辨能力，同时不造成浪费。以某遮拦比为22.3％的共轴三反系统的Φ600mm主镜为例，分析了主镜、次镜和三镜面形不规则对高斯焦点波前差的影响，并拟合了数学表达式。使用环域修正Zernike多项式作为光机接口，分析了环境对反射镜面形的影响以及传递函数下降的情况，并将分析结果做为参考对主镜支撑进行了改进。根据像差容限和系统的环境耐受力，分解出主镜加工所需的精度应优于λ/36.5.

Abstract

On-axis TMA (Three Mirror Anastigmatic) is a popular form used in lightweight high resolution space-borne camera. Mirrors of on-axis TMA are often aspherical

whose surface accuracy are influenced by environment and manufacturing. Environment endurance is decided by structure design

and manufacturing is connected to time and cost. So

every factor should be synthesized and analyzed to ensure the designed resolution of optical system

and do not lead to any waste. Take some actual on-axis TMA system with a Φ600mm primary mirror for example

surface irregularity influence to Gaussian focus wave-front error is analyzed

and mathematic expression of the influence is acquired.. Circle field fixed Zernike polynomial is used as a opt-mechanic interface to analyze the environment influence on primary mirror and system performance degeneration. Taking the result as reference

supporting structure of primary mirror is improved. Based on the Marechal criterion and environment endurance

the manufacturing accuracy of primary mirror is deduced

which should precede λ/36.5.

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Related Institution

Laboratory of Science and Technology on Integrated Information System， Institute of Software， Chinese Academy of Sciences

Changchun Institute of Optics，Fine Mechanics and Physics，Chinese Academy of Sciences

Graduate School at Shenzhen, Tsinghua University

School of Optoelectronics, Beijing Institute of Technology

Key Laboratory of Optical Information Science and Technology of the Ministry of Education, Institute of Modern Optics, Nankai University

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