Volume‐Phase Holographic Gratings and the Efficiency of Three Simple Volume‐Phase Holographic Gratings

Abstract

Volume-phase holographic (VPH) gratings show great potential as an alternative dispersing element to the classical surface-relief (SR) gratings presently used in most astronomical spectrographs. We present an introduction to this technology and give the results of an evaluation of three di †erent VPH gratings : a 300 line mm~1 grating optimized at 1064 nm, a 1200 line mm~1 grating optimized at 532 nm, and a 2400 line mm~1 grating optimized for operation at 532 nm.

Grism and immersion grating for space telescope

“…Noboru Ebizuka (1,6) , Kiko Oka (1,2) , Akiko Yamada (2) , Mami Ishikawa (2) , Masako Kashiwagi (2) , Kashiko Kodate (2) , Yasuhiro Hirahara (3) , Shuji Sato (3) , Koji S. Kawabata (4) , Moriaki Wakaki (5) , Shinya Morita (1) , Tomoyuki Simizu (1) , Shaohui Yin (1) , Hithoshi Omori (1) and Masanori Iye (6) ( (2) Faculty of Sciences, Japan Women's University (3) Faculty of Sciences, Nagoya University (4) Faculty of Sciences, Hiroshima University (5) Faculty of engineering, Tokai University (6) National Astronomical Observatory of Japan…”

IR spectrometer project for the BTA telescope

“…Volume Phase Holographic Gratings (VPHG) [9] have been used extensively in astronomical observations in recent years. Unlike classical gratings, which use spatial modulation, VPHG also uses modulation of the refraction index within a thin layer of dichromated gelatin of which the VPHG is made.…”

Untitled

“…Volume phase holographic gratings (VPHGs) are good candidate for these aims (Barden et al 1998(Barden et al , 2000Blanche et al 2004).…”

“…Volume phase holographic gratings (VPHGs) are good candidate for these aims (Barden et al 1998;Barden et al 2000;Blanche et al 2004). This kind of dispersing element exploits the periodical difference in refractive index that takes place in particular materials, therefore the diffraction happens in the volume of the material.…”