Optical designing of LiteBIRD

Hajime Sugai; Shingo Kashima; Kimihiro Kimura; Tomotake Matsumura; Masanori Inoue; Makoto Ito; Toshiyuki Nishibori; Yutaro Sekimoto; Hirokazu Ishino; Yuki Sakurai; Hiroaki Imada; Takenori Fujii

doi:10.1117/12.2232008

29 July 2016 Optical designing of LiteBIRD

Hajime Sugai, Shingo Kashima, Kimihiro Kimura, Tomotake Matsumura, Masanori Inoue, Makoto Ito, Toshiyuki Nishibori, Yutaro Sekimoto, Hirokazu Ishino, Yuki Sakurai, Hiroaki Imada, Takenori Fujii

Author Affiliations +

Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave; 99044H (2016) https://doi.org/10.1117/12.2232008
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

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Hajime Sugai, Shingo Kashima, Kimihiro Kimura, Tomotake Matsumura, Masanori Inoue, Makoto Ito, Toshiyuki Nishibori, Yutaro Sekimoto, Hirokazu Ishino, Yuki Sakurai, Hiroaki Imada, and Takenori Fujii "Optical designing of LiteBIRD", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99044H (29 July 2016); https://doi.org/10.1117/12.2232008

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