Novel transmission gratings with large angular dispersion, high-efficiency, and wide spectral bandwidth

Noboru Ebizuka; Takayuki Okamoto; Yutaka Yamagata; Minoru Sasaki; Makio Nishimaki; Kazuya Yamamoto; Yukinobu Nishio; Masanao Abe; Yusuke Nakauchi; Kazuto Saiki; Keisuke Isogai; Masaaki Otsuka; Ichi Tanaka; Takashi Hattori; Shinobu Ozaki; Wako Aoki

doi:10.1117/12.3018724

26 August 2024 Novel transmission gratings with large angular dispersion, high-efficiency, and wide spectral bandwidth

Noboru Ebizuka, Takayuki Okamoto, Yutaka Yamagata, Minoru Sasaki, Makio Nishimaki, Kazuya Yamamoto, Yukinobu Nishio, Masanao Abe, Yusuke Nakauchi, Kazuto Saiki, Keisuke Isogai, Masaaki Otsuka, Ichi Tanaka, Takashi Hattori, Shinobu Ozaki, Wako Aoki

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131005O (2024) https://doi.org/10.1117/12.3018724
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We are developing fabrication methods of a volume binary (VB) grating, trapezoid grating and reflector facet transmission (RFT) grating. The VB grating can achieve a larger angular dispersion and higher diffraction efficiency than conventional surface-relief transmission gratings with step shaped grooves, it can be achieved a wider spectral bandwidth than a volume phase holographic (VPH) grating whose refractive index is sinusoidally modulated. The trapezoid grating can bring the spectral characteristics of s- and p-polarization closer to each other than a VB grating, so it can further improve the peak diffraction efficiency.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Noboru Ebizuka, Takayuki Okamoto, Yutaka Yamagata, Minoru Sasaki, Makio Nishimaki, Kazuya Yamamoto, Yukinobu Nishio, Masanao Abe, Yusuke Nakauchi, Kazuto Saiki, Keisuke Isogai, Masaaki Otsuka, Ichi Tanaka, Takashi Hattori, Shinobu Ozaki, and Wako Aoki "Novel transmission gratings with large angular dispersion, high-efficiency, and wide spectral bandwidth", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131005O (26 August 2024); https://doi.org/10.1117/12.3018724

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