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Proceedings Paper

Design of imaging spectrometer based on Czerny-Turner in FUV
Author(s): Jianpeng Liu; Yi Tang; Yan Wu; Zhige Zhang; Guoqiang Ni
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Paper Abstract

It is the astigmatism that leads the traditional imaging spectrometer based on Czerny-Turner to have low spatial resolution. And it is discovered that when the distance between concave mirror and grating, x, is equal to the twice of focal length, ƒ, of the mirror, SII = SIII = 0 and the aberration is the least as well as the astigmatism is eliminated greatly. Meanwhile the toroidal mirror is presented to correct the astigmatism, and as well the aberration caused by the large FOV is corrected by optimizing the surface tilt. Then both of the spatial and spectral resolutions are improved. Finally a Czerny-Turner imaging spectrometer working in FUV (120 nm ~ 180 nm) with 2.5° FOV is designed, and its focal length is 147.61 mm, its F number is 3.93. MTF of this imaging spectrometer is more than 0.39 at 20 lp/mm in the total wavelength band of FOV, which satisfied the requirements of imaging spectrometer working on satellite in FUV.

Paper Details

Date Published: 9 November 2010
PDF: 8 pages
Proc. SPIE 7849, Optical Design and Testing IV, 78492I (9 November 2010); doi: 10.1117/12.870394
Show Author Affiliations
Jianpeng Liu, Beijing Institute of Technology (China)
Yi Tang, Beijing Institute of Technology (China)
Yan Wu, Beijing Institute of Technology (China)
Zhige Zhang, Beijing Institute of Technology (China)
Guoqiang Ni, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 7849:
Optical Design and Testing IV
Yongtian Wang; Julie Bentley; Chunlei Du; Kimio Tatsuno; Hendrik P. Urbach, Editor(s)

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