Optical design for Subaru Nasmyth Beam Switcher

Jessica R. Zheng, Nick Binos, Peter Gillingham, Helen McGregor, Scott Smedley, Jon Lawrence, Takashi Hattori, Yosuke Minowa, Olivier Guyon

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

5 Scopus citations


Subaru Nasmyth Beam-Switcher (SNBS) is an instrument designed for Nasmyth platform at Subaru telescope. It is a relay optics system which switches the light downstream of AO188 and LTAO to multiple instruments and allow multiple instruments work simultaneously with Subaru Coronagraphic Extreme Adaptive Optics system (SCExAO). The design has been completed and is now in building phase. The instrument working wavelength range is from 0.5μm to 5.3μm with field of view of 75 arcsecs in diameter. In this paper, we present its optical design and performance at different exit bays with various adaptive optics (AO) configurations. The wavefront at SCExAO bay is investigated. Tolerance and thermal performance of the switcher is also presented.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Telescopes IX
EditorsHeather K. Marshall, Jason Spyromilio, Tomonori Usuda
ISBN (Electronic)9781510653450
StatePublished - 2022
Externally publishedYes
EventGround-Based and Airborne Telescopes IX 2022 - Montreal, United States
Duration: Jul 17 2022Jul 22 2022

Publication series

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


ConferenceGround-Based and Airborne Telescopes IX 2022
Country/TerritoryUnited States


  • AO188
  • Optical switch
  • SCExAO
  • Subaru telescope

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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