Journal Article

Concept Study of Optical Configurations for High-Frequency Telescope for LiteBIRD

Otani, C., Matsuura, S., Jeong, O., Boulanger, F., Dobbs, M., Hattori, M., Richards, P. L., Hasebe, T., Lazarian, A., Fujino, T., Nitta, T., Kida, Y., Arnold, K., Komatsu, K., Maffei, B., Aumont, J., Nakamura, S., Sherwin, B. D., Turin, P., Sawada, M., Stompor, R., Yamamoto, R., Kusaka, A., Mangilli, A., Inoue, Y., Takaku, R., Yoshida, M., Hayes, L., Kawasaki, T., Tomida, T., Westbrook, B., Tsujimoto, M., Seljak, U., Yamashita, T., Curtis, D. W., Nagata, R., Basak, S., Ganga, K., Keskitalo, R., Pisano, G., Kimura, K., Tomaru, T., Sato, Y., Hidehira, N., Minami, Y., Takakura, S., Cukierman, A., Nagai, M., Thompson, K. L., Funaki, T., Tanabe, D., Kohri, K., Tomita, N., Okamura, T., Hattori, K., Sakurai, Y., Suzuki, A., Tajima, O., Tristram, M., Willer, M., Sugita, H., Ichiki, K., Vansyngel, F., Noguchi, T., Eriksen, H. K., Ishino, H., Hazumi, M., Suzuki, J., Errard, J., Kernasovskiy, S. A., Dotani, T., Patanchon, G., Thorne, B., Mima, S., Matsumura, T., Maki, M., Dominjon, A., Ducout, A., Uozumi, S., Oguri, S., Li, D., Cho, H. -M., Takada, S., Yamada, Y., de Haan, T., Imada, H., Calabrese, E., Goeckner-Wald, N., Okamoto, A., Nishino, H., Nakajima, M., Yamasaki, N., Mo

2018

Overview

© 2018 Springer Science+Business Media, LLC, part of Springer Nature The high-frequency telescope for LiteBIRD is designed with refractive and reflective optics. In order to improve sensitivity, this paper suggests the new optical configurations of the HFT which have approximately 7 times larger focal planes than that of the original design. The sensitivities of both the designs are compared, and the requirement of anti-reflection (AR) coating on the lens for the refractive option is derived. We also present the simulation result of a sub-wavelength AR structure on both surfaces of silicon, which shows a band-averaged reflection of 1.1–3.2% at 101–448 GHz.

• Publisher: Springer