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Correction of astigmatism and coma using analytic theory of aberrations in imaging spectrometer based on concentric off-axis dual reflector system
A specific imaging spectrometer based on a concentric off-axis dual reflector system is proposed, free of astigmatism and coma. The described imaging spectrometer consists of four spherical mirrors and a plane grating. The analytic theory of aberrations and the optical path-length concept are used to derive the astigmatism elimination and coma removal. It is shown that the astigmatism in these imaging spectrometers is eliminated by characterizing three angles, and the coma is corrected when unequal mirror radii are config ...
Chen, Ting; Tang, Yi; Zhang, Li; Chang, Yue; Zheng, Cheng;
Published by: Applied Optics Published on: Jan-01-2014
YEAR: 2014   DOI: 10.1364/AO.53.000565
Interplanetary shock induced ring current auroras
Zhang, Yongliang; Paxton, Larry; Zheng, Yihua;
Published by: Journal of Geophysical Research Published on: Jan-01-2008
YEAR: 2008   DOI: 10.1029/2007JA012554