2016/07/29 by Hajime Sugai, Shingo Kashima, Kimihiro Kimura +9 · 2 citations
Physics and Astronomy · Earth and Planetary Sciences · #Cosmology and Gravitation Theories #Radio Astronomy Observations and Technology #Geophysics and Gravity Measurements
paper · doi:10.1117/12.2232008
openalex publication_date 2016/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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.