| 光谱学与光谱分析 |
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| Design and Analysis of a Novel Light Visible Spectrum Imaging Spectrograph Optical System |
| SHEN Man-de, LI Fei, ZHOU Li-bing, LI Cheng, REN Huan-huan, JIANG Qing-xiu |
| School of Electronic and Electrical Engineering, Wuhan Textile University, Wuhan 430073, China |
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Abstract A novel visible spectrum imaging spectrograph optical system was proposed based on the negative dispersion, the arbitrary phase modulation characteristics of diffractive optical element and the aberration correction characteristics of freeform optical element. The double agglutination lens was substituted by a hybrid refractive/ diffractive lens based on the negative dispersion of diffractive optical element. Two freeform optical elements were used in order to correct some aberration based on the aberration correction characteristics of freeform optical element. An example and frondose design process were presented. When the design parameters were uniform, compared with the traditional system, the novel visible spectrum imaging spectrograph optical system’s weight was reduced by 22.9％, the total length was reduced by 26.6%, the maximal diameter was reduced by 30.6%, and the modulation transfer function (MTF) in 1.0 field-of-view was improved by 0.35 with field-of view improved maximally. The maximal distortion was reduced by 1.6%, the maximal longitudinal aberration was reduced by 56.4%, and the lateral color aberration was reduced by 59.3%. From these data, we know that the performance of the novel system was advanced quickly and it could be used to put forward a new idea for modern visible spectrum imaging spectrograph optical system design.
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Received: 2013-07-28
Accepted: 2013-12-19
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Corresponding Authors:
SHEN Man-de
E-mail: opticaldesign@126.com
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