Novel gratings for next-generation instruments of astronomical observations - Ebizuka, N; Okamoto, T; Takeda, M; Hosobata, T; Yamagata, Y; Sasaki, M; Uomoto, M; Shimatsu, T; Sato, S; Hashimoto, N; Tanaka, I; Hattori, T; et al. (SPIE, 2017)