Cryogenic Volume-Phase Holographic Grisms for MOIRCS

We have developed high-dispersion VPH (volume phase holographic) grisms with zinc selenide (ZnSe) prisms for the cryogenic optical system of MOIRCS (Multi-Object near-InfraRed Camera and Spectrograph) for Y-, J-, H-, and K-band observations. We fabricated VPH gratings using a hologram resin. After s...

Full description

Saved in:
Bibliographic Details
Published in:Publications of the Astronomical Society of Japan 2011-03, Vol.63 (sp2), p.S605-S612
Main Authors: Ebizuka, Noboru, Ichiyama, Kotaro, Yamada, Toru, Tokoku, Chihiro, Onodera, Masato, Hanesaka, Mai, Kodate, Kashiko, Uchimoto, Yuka Katsuno, Maruyama, Miyoko, Shimasaku, Kazuhiro, Tanaka, Ichi, Yoshikawa, Tomohiro, Kashikawa, Nobunari, Iye, Masanori, Ichikawa, Takashi
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have developed high-dispersion VPH (volume phase holographic) grisms with zinc selenide (ZnSe) prisms for the cryogenic optical system of MOIRCS (Multi-Object near-InfraRed Camera and Spectrograph) for Y-, J-, H-, and K-band observations. We fabricated VPH gratings using a hologram resin. After several heat cycles at between room temperature and 120 K, the VPH gratings were assembled to grisms by gluing with two ZnSe prisms. Several heat cycles were also carried out for the grisms before being installed into MOIRCS. We measured the efficiencies of the VPH grisms in a laboratory, and found them to be 70%–82%. The performances obtained by observations of MOIRCS with the 8.2 m Subaru Telescope have been found to be very consistent with the results in the laboratory test. This is the first astronomical application of cryogenic VPH grisms.
ISSN:0004-6264
2053-051X
DOI:10.1093/pasj/63.sp2.S605