TitleCorrection of astigmatism and coma using analytic theory of aberrations in imaging spectrometer based on concentric off-axis dual reflector system
Publication TypeJournal Article
Year of Publication2014
AuthorsChen, TAi, Tang, Y, Zhang, LJun, Chang, YE, Zheng, C
JournalApplied Optics
Volume53
Issue4
Pagination565
Date PublishedJan-01-2014
ISSN0003-6935
Abstract

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 configured in collimating and condensing optics. The developed aberration principle is verified by comparing the performance of the astigmatism-eliminated spectrometer with the spectrometer which has neither astigmatism nor coma.

URLhttp://www.opticsinfobase.org/abstract.cfm?URI=ao-53-4-565
DOI10.1364/AO.53.000565
Short TitleAppl. Opt.


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