Hyperion: Far-UV cross dispersion spectroscope design

Heejoo Choi, Isaac Trumper, Yi Ting Feng, Hyukmo Kang, Erika Hamden, Dae Wook Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Hyperion is a far-UV mission that investigates the birth clouds of stars using a 40 cm aperture telescope feeding an imaging long-slit spectrometer. The science requirements of the mission dictate that the spectrometer covers 140.5- 164.5 nm spectral range with resolution greater than 30,000. We employ smart and efficient design to create a longslit, cross dispersed, echelle spectrometer that utilizes a two-mirror freeform imaging optics. Echelle spectra for n = - 19, -18, and -17 over a 10 arcmin × 2.5 arcsec (length × width) FFOV are imaged onto the focal plane. We simulate the optical performance and the expected spectral efficiency.

Original languageEnglish (US)
Title of host publicationOptical Manufacturing and Testing XIII
EditorsDae Wook Kim, Rolf Rascher
ISBN (Electronic)9781510637801
StatePublished - 2020
EventOptical Manufacturing and Testing XIII 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptical Manufacturing and Testing XIII 2020
Country/TerritoryUnited States
CityVirtual, Online


  • Far-UV spectroscopy
  • Freeform optic
  • Space telescope
  • chelle grating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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