Cryogenic volume-phase holographic grisms for MOIRCS

Noboru Ebizuka, Kotaro Ichiyama, Toru Yamada, Chihiro Tokoku, Masato Onodera, Mai Hanesaka, Kashiko Kodate, Yuka Katsuno Uchimoto, Miyoko Maruyama, Kazuhiro Shimasaku, Ichi Tanaka, Tomohiro Yoshikawa, Nobunari Kashikawa, Masanori Iye, Takashi Ichikawa

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)S605-S612
JournalPublications of the Astronomical Society of Japan
Issue numberSPEC. ISSUE 2
Publication statusPublished - 2011 Mar 25


  • Instrumentation: cryogenic infrared optics
  • Instrumentation: high dispersion grism
  • Instrumentation: hologram recording resin

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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