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Proceedings Paper

Fabrication of slicer optics of mid-infrared spectrometer with an image slicer (MIRSIS) for ground-based astronomy
Author(s): Kenji Mitsui; Norio Okada; Mitsuhiro Fukushima; Tetsuo Nishino; Yoshiko Kataza Okamoto; Hirokazu Kataza; Takashi Onaka
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Paper Abstract

Mid Infrared Spectrometer with an Image Slicer (MIRSIS) is a compact mid-infrared spectrometer with an image slicer as a testbed of techniques for efficient observations with next generation telescopes. MIRSIS is a 10-micron band spectrometer for ground-based observations. Optics of MIRSIS is mostly composed of reflective ones. A key point of the development of MIRSIS is a fabrication of slicer optics, which consists of slice mirrors, pupil mirrors and pseudo slit mirrors. It is necessary to develop fabrication technique of slicer optics, because shapes and alignment of these mirrors are special. Here it is also important to choose the design matched to the processing method. In this paper, we report our fabrication of the slicer optics elements in detail. As a result, we achieved the slice mirror with the micro-roughness of RMS 12nm and the angle accuracy of under 0.0041deg, the pupil mirror with the micro-roughness of RMS 20nm and the shape accuracy of PV 3micron, and the pseudo slit mirror with the angle accuracy of 0.02deg. All of the parts fabricated satisfy the required specification.

Paper Details

Date Published: 9 July 2008
PDF: 11 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701427 (9 July 2008); doi: 10.1117/12.787724
Show Author Affiliations
Kenji Mitsui, National Astronomical Observatory of Japan (Japan)
Norio Okada, National Astronomical Observatory of Japan (Japan)
Mitsuhiro Fukushima, National Astronomical Observatory of Japan (Japan)
Tetsuo Nishino, National Astronomical Observatory of Japan (Japan)
Yoshiko Kataza Okamoto, Ibaraki Univ. (Japan)
Hirokazu Kataza, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Takashi Onaka, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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