The optical design of CHARIS: An exoplanet IFS for the Subaru Telescope

Mary Anne Peters-Limbach, Tyler D. Groff, N. Jeremy Kasdin, Dave Driscoll, Michael Galvin, Allen Foster, Michael A. Carr, Dave LeClerc, Rad Fagan, Michael W. McElwain, Gillian Knapp, Timothy Brandt, Markus Janson, Olivier Guyon, Nemanja Jovanovic, Frantz Martinache, Masahiko Hayashi, Naruhisa Takato

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

27 Scopus citations


High-contrast imaging techniques now make possible both imaging and spectroscopy of planets around nearby stars. We present the optical design for the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), a lenslet-based, cryogenic integral field spectrograph (IFS) for imaging exoplanets on the Subaru telescope. The IFS will provide spectral information for 138×138 spatial elements over a 2.07 arcsec × 2.07 arcsec field of view (FOV). CHARIS will operate in the near infrared (λ = 1.15 - 2.5μm) and will feature two spectral resolution modes of R ≈ 18 (low-res mode) and R ≈ 73 (high-res mode). Taking advantage of the Subaru telescope adaptive optics systems and coronagraphs (AO188 and SCExAO), CHARIS will provide sufficient contrast to obtain spectra of young self-luminous Jupiter-mass exoplanets. CHARIS will undergo CDR in October 2013 and is projected to have first light by the end of 2015. We report here on the current optical design of CHARIS and its unique innovations.

Original languageEnglish (US)
Title of host publicationTechniques and Instrumentation for Detection of Exoplanets VI
StatePublished - 2013
EventTechniques and Instrumentation for Detection of Exoplanets VI - San Diego, CA, United States
Duration: Aug 26 2013Aug 29 2013

Publication series

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


OtherTechniques and Instrumentation for Detection of Exoplanets VI
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

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


  • Adaptive Optics
  • Coronagraphy
  • Exoplanets
  • High Contrast Imaging
  • Integral Field Spectrograph


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