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Proceedings Paper

Development of MIMIZUKU: a mid-infrared multi-field imager for 6.5-m TAO telescope
Author(s): Takafumi Kamizuka; Takashi Miyata; Shigeyuki Sako; Tomohiko Nakamura; Kentaro Asano; Mizuho Uchiyama; Kazushi Okada; Takashi Onaka; Itsuki Sakon; Hirokazu Kataza; Yuki Sarugaku; Yuzuru Yoshii; Mamoru Doi; Kotaro Kohno; Kimiaki Kawara; Masuo Tanaka; Kentaro Motohara; Toshihiko Tanabe; Takeo Minezaki; Tomoki Morokuma; Yoichi Tamura; Tsutomu Aoki; Takao Soyano; Ken'ichi Tarusawa; Natsuko Kato; Masahiro Konishi; Hidenori Takahashi; Shintaro Koshida; Ken Tateuchi; Toshihiro Handa
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Paper Abstract

TAO (The University of Tokyo Atacama Observatory) is planned to be constructed at the summit of Co. Chajnantor (5640 m altitude) in Chile. MIMIZUKU (Mid-Infrared Multi-field Imager for gaZing at the UnKnown Universe) is a mid-infrared imager (Field of View: 1' x 1'- 2' x 2') and spectrometer (Δλ/λ: 60-230) for the 6.5-m TAO telescope, covering the wavelength range of 2-38 μm. The MIMIZUKU has a unique equipment called Field Stacker (FS) which enables the simultaneous observation of target and reference object. The simultaneity is expected to improve photometric accuracy and to realize long-term monitoring observations. The development status of the MIMIZUKU is reported in this paper. The FS and the cryostat of the MIMIZUKU have been fabricated and under testing. The cold optics (550 mm x 750 mm x 2 floors) with 28 mirrors has been constructed. The mirrors were aligned with the positional precision of 0.1 mm and the angular precision of 0.1 deg. The evaluated optical performance is that the diffraction-limited image at λ <8 μm and the enough compact image (r <2 pix=0.22") at 2 λ ~2μm can be obtained. In the cold optics, the drive systems with backlash-less gears are employed and work well even in cryogenic environment. The grisms made with silicon and germanium have been fabricated by ultraprecision cutting. It was found that their surface roughness, grating constant, and blaze angle almost measure up to the designed values.

Paper Details

Date Published: 24 September 2012
PDF: 11 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84466P (24 September 2012); doi: 10.1117/12.926771
Show Author Affiliations
Takafumi Kamizuka, Institute of Astronomy, The Univ. of Tokyo (Japan)
Takashi Miyata, Institute of Astronomy, The Univ. of Tokyo (Japan)
Shigeyuki Sako, Institute of Astronomy, The Univ. of Tokyo (Japan)
Tomohiko Nakamura, The Univ. of Tokyo (Japan)
Kentaro Asano, Institute of Astronomy, The Univ. of Tokyo (Japan)
Mizuho Uchiyama, Institute of Astronomy, The Univ. of Tokyo (Japan)
Kazushi Okada, Institute of Astronomy, The Univ. of Tokyo (Japan)
Takashi Onaka, The Univ. of Tokyo (Japan)
Itsuki Sakon, The Univ. of Tokyo (Japan)
Hirokazu Kataza, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Yuki Sarugaku, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Yuzuru Yoshii, The Univ. of Tokyo (Japan)
Mamoru Doi, The Univ. of Tokyo (Japan)
Kotaro Kohno, The Univ. of Tokyo (Japan)
Kimiaki Kawara, The Univ. of Tokyo (Japan)
Masuo Tanaka, The Univ. of Tokyo (Japan)
Kentaro Motohara, The Univ. of Tokyo (Japan)
Toshihiko Tanabe, The Univ. of Tokyo (Japan)
Takeo Minezaki, The Univ. of Tokyo (Japan)
Tomoki Morokuma, The Univ. of Tokyo (Japan)
Yoichi Tamura, The Univ. of Tokyo (Japan)
Tsutomu Aoki, The Univ. of Tokyo (Japan)
Takao Soyano, The Univ. of Tokyo (Japan)
Ken'ichi Tarusawa, The Univ. of Tokyo (Japan)
Natsuko Kato, The Univ. of Tokyo (Japan)
Masahiro Konishi, The Univ. of Tokyo (Japan)
Hidenori Takahashi, The Univ. of Tokyo (Japan)
Shintaro Koshida, The Univ. of Tokyo (Japan)
Ken Tateuchi, Institute of Astronomy, The Univ. of Tokyo (Japan)
Toshihiro Handa, Kagoshima Univ. (Japan)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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