29 July 2016 Optical designing of LiteBIRD
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hajime Sugai, Hajime Sugai, Shingo Kashima, Shingo Kashima, Kimihiro Kimura, Kimihiro Kimura, Tomotake Matsumura, Tomotake Matsumura, Masanori Inoue, Masanori Inoue, Makoto Ito, Makoto Ito, Toshiyuki Nishibori, Toshiyuki Nishibori, Yutaro Sekimoto, Yutaro Sekimoto, Hirokazu Ishino, Hirokazu Ishino, Yuki Sakurai, Yuki Sakurai, Hiroaki Imada, Hiroaki Imada, Takenori Fujii, Takenori Fujii, } "Optical designing of LiteBIRD", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99044H (29 July 2016); doi: 10.1117/12.2232008; https://doi.org/10.1117/12.2232008
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