TY - JOUR
T1 - Cryogenic volume-phase holographic grisms for MOIRCS
AU - Ebizuka, Noboru
AU - Ichiyama, Kotaro
AU - Yamada, Toru
AU - Tokoku, Chihiro
AU - Onodera, Masato
AU - Hanesaka, Mai
AU - Kodate, Kashiko
AU - Uchimoto, Yuka Katsuno
AU - Maruyama, Miyoko
AU - Shimasaku, Kazuhiro
AU - Tanaka, Ichi
AU - Yoshikawa, Tomohiro
AU - Kashikawa, Nobunari
AU - Iye, Masanori
AU - Ichikawa, Takashi
PY - 2011/3/25
Y1 - 2011/3/25
N2 - 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 8.2m 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.
AB - 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 8.2m 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.
KW - Instrumentation: cryogenic infrared optics
KW - Instrumentation: high dispersion grism
KW - Instrumentation: hologram recording resin
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U2 - 10.1093/pasj/63.sp2.S605
DO - 10.1093/pasj/63.sp2.S605
M3 - Article
AN - SCOPUS:79953327293
VL - 63
SP - S605-S612
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
SN - 0004-6264
IS - SPEC. ISSUE 2
ER -