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Proceedings Paper

Design of airborne imaging spectrometer based on curved prism
Author(s): Yunfeng Nie; Bin Xiangli; Jinsong Zhou; Xiaoxiao Wei
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Paper Abstract

A novel moderate-resolution imaging spectrometer spreading from visible wavelength to near infrared wavelength range with a spectral resolution of 10 nm, which combines curved prisms with the Offner configuration, is introduced. Compared to conventional imaging spectrometers based on dispersive prism or diffractive grating, this design possesses characteristics of small size, compact structure, low mass as well as little spectral line curve (smile) and spectral band curve (keystone or frown). Besides, the usage of compound curved prisms with two or more different materials can greatly reduce the nonlinearity inevitably brought by prismatic dispersion. The utilization ratio of light radiation is much higher than imaging spectrometer of the same type based on combination of diffractive grating and concentric optics. In this paper, the Seidel aberration theory of curved prism and the optical principles of Offner configuration are illuminated firstly. Then the optical design layout of the spectrometer is presented, and the performance evaluation of this design, including spot diagram and MTF, is analyzed. To step further, several types of telescope matching this system are provided. This work provides an innovational perspective upon optical system design of airborne spectral imagers; therefore, it can offer theoretic guide for imaging spectrometer of the same kind.

Paper Details

Date Published: 5 December 2011
PDF: 8 pages
Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 81970U (5 December 2011); doi: 10.1117/12.904270
Show Author Affiliations
Yunfeng Nie, The Academy of Opto-Electronics (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Bin Xiangli, The Academy of Opto-Electronics (China)
Jinsong Zhou, The Academy of Opto-Electronics (China)
Xiaoxiao Wei, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 8197:
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Yunlong Sheng; Han-Ping Shieh; Kimio Tatsuno, Editor(s)

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