We provide the current status of the development of the optical system and we describe the current plan of activities related to optical performance simulation and validation.
We describe the main features of the MHFT, its design drivers and the major challenges in system optimization and characterization. Given the high target sensitivity and the careful systematics control needed to achieve the scientific goals of the mission, optical modeling and characterization are performed with the aim to capture most of the physical effects potentially affecting the real performance of the two refractors.
The onboard instrumentation includes a Middle and High Frequency Telescope (MHFT), based on a pair of cryogenically cooled refractive telescopes covering, respectively, the 89-224 GHz and the 166-448 GHz bands. LiteBIRD is a JAXA strategic L-class mission devoted to the measurement of polarization of the Cosmic Microwave Background, searching for the signature of primordial gravitational waves in the B-modes pattern of the polarization. (United States)ġ3Kavli Institute for the Physics and Mathematics of the Universe (Japan)ġ4Institut de Recherche en Astrophysique et Planétologie (France)ġ6Institut d’Astrophysique Spatiale, Univ. of Colorado Boulder (United States)ġ2Lawrence Berkeley National Lab. Paris-Saclay, CNRS/IN2P3, IJCLab (France)ġ1Univ. degli Studi di Milano Statale (Italy)ĨNational Institute of Standards and Technology (United States)ĩInstitut d'Astrophysique Spatiale, Univ.
Winter 18ĤNational Astronomical Observatory of Japan (Japan)ĦUniv.