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The Korean Astronomical Society (한국천문학회)
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OPTICAL DESIGN OF FIMS TYPE FAR ULTRAVIOLET SPECTROGRAPH FOR SPACE OBSERVATION

FIMS 타입의 우주관측용 원자외선분광기 광학설계

  • 선광일 (한국천문연구원 우주과학연구부) ;
  • 육인수 (한국천문연구원 우주과학연구부) ;
  • 유광선 (한국과학기술원 인공위성연구센터) ;
  • 이대희 (한국천문연구원 우주과학연구부)
  • Published : 2004.12.01
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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.

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References

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