Design of airborne imaging spectrometer based on curved prism

Yunfeng Nie; Bin Xiangli; Jinsong Zhou; Xiaoxiao Wei

doi:10.1117/12.904270

5 December 2011 Design of airborne imaging spectrometer based on curved prism

Yunfeng Nie, Bin Xiangli, Jinsong Zhou, Xiaoxiao Wei

Proceedings Volume 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 81970U (2011) https://doi.org/10.1117/12.904270
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

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.

Citation Download Citation

Yunfeng Nie, Bin Xiangli, Jinsong Zhou, and Xiaoxiao Wei "Design of airborne imaging spectrometer based on curved prism", Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 81970U (5 December 2011); https://doi.org/10.1117/12.904270

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