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Proceedings Paper

Optical designing of LiteBIRD
Author(s): Hajime Sugai; Shingo Kashima; Kimihiro Kimura; Tomotake Matsumura; Masanori Inoue; Makoto Ito; Toshiyuki Nishibori; Yutaro Sekimoto; Hirokazu Ishino; Yuki Sakurai; Hiroaki Imada; Takenori Fujii
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Paper Abstract

LiteBIRD aims to detect the footprint of the primordial gravitational wave on the Cosmic Microwave Background (CMB) in a form of polarization pattern called B mode. In order to separate CMB from the Galactic emission, our measurements cover 35 GHz to 450 GHz. The LiteBIRD optics consists of two telescopes: a crossed Dragone type for lower frequencies, which provides a compact configuration with a wide field of view, and a refractor type for higher frequencies. The whole optical system is cooled down to around 5 K to minimize the thermal emission. We use two kinds of approaches of designing calculations as well as the experimental confirmation particularly for the lower frequency telescope.

Paper Details

Date Published: 29 July 2016
PDF: 7 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99044H (29 July 2016); doi: 10.1117/12.2232008
Show Author Affiliations
Hajime Sugai, The Univ. of Tokyo (Japan)
Shingo Kashima, National Astronomical Observatory of Japan (Japan)
Kimihiro Kimura, Osaka Prefecture Univ. (Japan)
Tomotake Matsumura, Japan Aerospace Exploration Agency (Japan)
Masanori Inoue, Osaka Prefecture Univ. (Japan)
Makoto Ito, Osaka Prefecture Univ. (Japan)
Toshiyuki Nishibori, Japan Aerospace Exploration Agency (Japan)
Yutaro Sekimoto, National Astronomical Observatory of Japan (Japan)
Hirokazu Ishino, Okayama Univ. (Japan)
Yuki Sakurai, The Univ. of Tokyo (Japan)
Hiroaki Imada, Japan Aerospace Exploration Agency (Japan)
Takenori Fujii, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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