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Proceedings Paper

VINROUGE: a very compact 2-5μm high-resolution spectrograph with germanium immersion grating
Author(s): Takayuki Arasaki; Naoto Kobayashi; Yuji Ikeda; Shohei Kondo; Yuki Sarugaku; Sayumi Kaji; Hideyo Kawakita
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Paper Abstract

The infrared high-resolution and highly-sensitive spectroscopy can provide new and deep insights in many fields of astronomy. The 2.0-5.5 μm region is a very unique and important wavelength region for astrochemistry and astrobiology, because the vibrational transitions of C-H, N-H, O-H, C-O, and C-N bonds in many molecules, which are of astrophysical interest, concentrate in this wavelength range. To advance the study in this wavelength range, we are developing a new near-infrared spectrograph: VINROUGE (= Very-compact INfrared high-ResOlUtion Ge-immersion Echelle spectrograph). The instrumental concepts of VINROUGE are “high-resolution”, “highly-sensitive”, and “very-compact instrumentation”. With (i) Germanium immersion grating, (ii) white pupil spectrograph design, (iii) reflective optics using the integrated off-axis mirrors and the optical bench by ceramic (cordierite CO-220), and (iv) highly-sensitive array (HAWAII-2RG 5.3μm cutoff array), we could obtain a solution of optical design with a spectral resolution of 80,000, total throughput of > 0.28, and a compact volume that is smaller than 600 mm×600 mm×600 mm even for 10-m class telescope. We have already completed the development of Germanium immersion grating. In this year, we plan to fabricate a set of integrated off-axis ceramic mirrors together with the ceramic optical bench to demonstrate that the reflective optics was an athermal performance. The first light of VINROUGE is expected in 2019.

Paper Details

Date Published: 9 August 2016
PDF: 10 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990875 (9 August 2016); doi: 10.1117/12.2233739
Show Author Affiliations
Takayuki Arasaki, Kyoto Sangyo Univ. (Japan)
Naoto Kobayashi, Kyoto Sangyo Univ. (Japan)
The Univ. of Tokyo (Japan)
Yuji Ikeda, Kyoto Sangyo Univ. (Japan)
Photocoding (Japan)
Shohei Kondo, Kyoto Sangyo Univ. (Japan)
Yuki Sarugaku, The Univ. of Tokyo (Japan)
Sayumi Kaji, Kyoto Sangyo Univ. (Japan)
Hideyo Kawakita, Kyoto Sangyo Univ. (Japan)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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