Cold optical design for the large aperture Simons' Observatory telescope

  • S. R. Dicker*
  • , P. A. Gallardo
  • , J. E. Gudmudsson
  • , P. D. Mauskopf
  • , A. Ali
  • , P. C. Ashton
  • , G. Coppi
  • , M. J. Devlin
  • , N. Galitzki
  • , S. P. Ho
  • , C. A. Hill
  • , J. Hubmayr
  • , B. Keating
  • , A. T. Lee
  • , M. Limon
  • , F. Matsuda
  • , J. McMahon
  • , M. D. Niemack
  • , J. L. Orlowski-Scherer
  • , L. Piccirillo
  • M. Salatino, S. M. Simon, S. T. Staggs, R. Thornton, J. N. Ullom, E. M. Vavagiakis, E. J. Wollack, Z. Xu, N. Zhu
*Corresponding author for this work

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

The Simons Observatory will consist of a single large (6 m diameter) telescope and a number of smaller (∼0.5 m diameter) refracting telescopes designed to measure the polarization of the Cosmic Microwave Background to unprecedented accuracy. The large aperture telescope is the same design as the CCAT-prime telescope, a modified Crossed Dragone design with a field-of-view of over 7.8 degrees diameter at 90 GHz. This paper presents an overview of the cold reimaging optics for this telescope and what drove our choice of 350-400 mm diameter silicon lenses in a 2.4 m cryostat over other possibilities. We will also consider the future expandability of this design to CMB Stage-4 and beyond.

Original languageEnglish
Title of host publicationGround-Based and Airborne Telescopes VII
EditorsHeather K. Marshall, Jason Spyromilio
PublisherSPIE
ISBN (Electronic)9781510619531
DOIs
Publication statusPublished - 2018
EventGround-Based and Airborne Telescopes VII 2018 - Austin, United States
Duration: 10 Jun 201815 Jun 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10700
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceGround-Based and Airborne Telescopes VII 2018
Country/TerritoryUnited States
CityAustin
Period10/06/1815/06/18

Keywords

  • Crossed Dragone
  • cryogenic optical design
  • silicon lenses
  • Simons Observatory

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