大视场快焦比施密特系统在星载光谱仪中的应用

王欣; 刘强; 舒嵘

doi:10.3788/OPE.20192703.0533

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大视场快焦比施密特系统在星载光谱仪中的应用

现代应用光学 | 更新时间：2020-08-13

- 大视场快焦比施密特系统在星载光谱仪中的应用
- Application of Schmidt optical system with wide-field of view and fast focal ratio to aerospace imaging spectrometer
- 光学精密工程 2019年27卷第3期页码：533-541
- 作者机构：
  
  中国科学院上海技术物理研究所空间主动光电技术重点实验室，上海 200083
- 作者简介：
  
  [ "王欣(1977-)，女，陕西杨凌人，博士，研究员，2002年于中国科学院南京天文光学技术研究所获得硕士学位，2010年于中国科学院上海技术物理研究所获得博士学位，主要从事航天激光三维成像仪、高光谱成像仪、红外相机光学设计、光机一体化仿真和光电系统检测方面的研究。E-mail:wangxin@mail.sitp.ac.cn" ]
  [ "刘强(1989-)，男，安徽安庆人，助理研究员，2016年于中国科学院南京天文光学技术研究所获得硕士学位，主要从事激光三维成像系统大口径光学计算机辅助装调和光学检测方面的研究。E-mail: qliu@niaot.ac.cn" ]
- 基金信息：
  
  国家重大科技专项
- DOI：10.3788/OPE.20192703.0533
  中图分类号： TH744.1
- 收稿日期：2018-09-11，
  
  录用日期：2018-11-10，
  
  纸质出版日期：2019-03-15
- 稿件说明：
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王欣, 刘强, 舒嵘. 大视场快焦比施密特系统在星载光谱仪中的应用[J]. 光学精密工程, 2019,27(3):533-541.

Xin WANG, Qiang LIU, Rong SHU. Application of Schmidt optical system with wide-field of view and fast focal ratio to aerospace imaging spectrometer[J]. Optics and precision engineering, 2019, 27(3): 533-541.
王欣, 刘强, 舒嵘. 大视场快焦比施密特系统在星载光谱仪中的应用[J]. 光学精密工程, 2019,27(3):533-541. DOI： 10.3788/OPE.20192703.0533.

Xin WANG, Qiang LIU, Rong SHU. Application of Schmidt optical system with wide-field of view and fast focal ratio to aerospace imaging spectrometer[J]. Optics and precision engineering, 2019, 27(3): 533-541. DOI： 10.3788/OPE.20192703.0533.

摘要

根据大视场和快焦比空间遥感高光谱成像仪的研究目标，采用折叠三反施密特望远镜和自由曲面Offner凸面光栅光谱仪结构，设计了一个视场为5°，焦比为2，工作谱段在400~1 000 nm，光谱分辨率为5 nm的星载高光谱成像仪光学系统。推导了非对称非球面施密特主镜的理论计算方法，介绍了镜面的制造方法。利用Zemax光学设计软件进行了光线追迹和优化设计，结果显示光谱畸变＜0.88%，光谱弯曲＜1/3探测器像元，所有谱段的光学传递函数均大于0.8，满足星载高光谱成像仪的技术要求。施密特系统结构简单，仅含有一个非球面，在大视场工作时具有像质优良和畸变小的特点，且中心遮拦比小、体积紧凑，适合未来大视场快焦比的大口径星载遥感应用。

Abstract

To meet the application demands of a wide field of view and fast focal ratio for an aerospace imaging spectrometer

a three-mirror folded Schmidt telescope using a freeform Offner convex grating spectrometer was designed to obtain a field of view 5°

focal ratio of 2

spectral range of 400-1 000 nm

and spectral resolution of 5 nm for a space hyperspectral imager. The expression of an axisymmetric anamorphic asphere Schmidt surface was given and calculated

and a manufacturing method was introduced. The optical system for a Schmidt spectrometer was designed and optimized using software Zemax. Results show that spectral distortion is less than 0.88%

the spectral smile is smaller than 1/3 pixel size

and the optical module transfer function is greater than 0.8. These imaging characteristics can meet the requirements of a space imager. The Schmidt system shows a simple configuration and uses only a single aspherical mirror. Because it possesses excellent imaging specifications

small distortion

small central obscuration

and a compact size

Schmidt is the best candidate for a space instrument with a large aperture

large field of view

and fast focal ratio.

关键词

Keywords

references

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