Cryogenic Volume-Phase Holograpic Grisms for MOIRCS

Abstract

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 the 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.

15 pages, 11 figures, published in PASJ 63, SP2 (Subaru special issue)

References in corpus (3)

• MOIRCS Deep Survey IV: Evolution of Galaxy Stellar Mass Function Back to z ~ 3
• MOIRCS Deep Survey. VI. Near-Infrared Spectroscopy of K-Selected Star-Forming Galaxies at z~2
• Grisms Developed for FOCAS

Cited by in corpus (8)

• Identification of the progenitors of rich clusters and member galaxies in rapid formation at z>2
• An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z>2
• KOOLS--IFU: Kyoto Okayama Optical Low-dispersion Spectrograph with Optical-Fiber Integral Field Unit
• NIR spectroscopic observation of massive galaxies in the protocluster at z = 3.09
• Grisms Developed for FOCAS
• X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6.56
• A new photopolymer based VPHG for astronomy: The case of SN 2013fj
• A Grism Design Review and the as-built performance of the silicon grisms for JWST-NIRCAM