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http://dx.doi.org/10.5303/PKAS.2004.19.1.065

OPTICAL DESIGN OF FIMS TYPE FAR ULTRAVIOLET SPECTROGRAPH FOR SPACE OBSERVATION  

SEON KWANG-IL (Korea Astronomy Observatory)
YUK IN-SOO (Korea Astronomy Observatory)
RYU KWANG-SUN (Satellite Technology Research Center, KAIST)
LEE DAE-HEE (Korea Astronomy Observatory)
Publication Information
Publications of The Korean Astronomical Society / v.19, no.1, 2004 , pp. 65-70 More about this Journal
Abstract
An imaging spectrograph concept optimized for extended far-ultraviolet emission sources is presented. Although the design was originally developed for FIMS aboard the first Korean science satellite STSAT-l launched on September 27, 2003, no rigorous theoretical background of the spectrograph design has been published. The spectrograph design employs an off-axis parabolic cylinder mirror in front of a slit that guides lights to a diffraction grating. The concave grating provides moderate spatial resolution over a large field of view. This mapping capability is absent in most astronomical instruments but is crucial to the understanding of the nature of a variety of astrophysical phenomena. The aberration theory presented in this paper can be extended to holographic gratings in order to improve the spatial as well as the spectral resolutions.
Keywords
instrumentation: spectrographs; techniques: spectroscopic;
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