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Proceedings Paper

Development of the optical and infrared interferometer MIRA-I.2
Author(s): Koichi Sato; Jun Nishikawa; Masanori Yoshizawa; Toshio Fukushima; Yoshihiro Machida; Yukihiro Honma; Ryuichiro Kuwabara; Shunsaku Suzuki; Yasuo Torii; Koichi Kubo; Ko Matsuda; Hikaru Iwashita
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Paper Abstract

The MIRA-1.2 system consists of two siderostats, beam reducers, vacuum delay liens, baseline metrology system, tip-tilt mirrors, beam combine optics, and fringe detector. Two siderostats, of which aperture of the flat mirror is 300mm, are placed apart by 4 meters in the north-south direction. Beam reducer is a Cassegrain optics with the paraboloidal primary and secondary mirrors of the diameter D1 equals 200mm and D2 equals 30mm, respectively. The metrology system with laser interferometers is set up to stabilize the baseline length for astrometry. Piezo-driven tip-tilt mirrors are equipped for the correction of image motions due to the air turbulence and other errors. Delay lines are placed in a vacuum tube. Experiments of the fiber optics is carried out as a part of MIRA-1.2. Developing MIRA-1.2 system, it is aimed to establish the basic techniques of astrometry and future projects, especially of MIRA-II.

Paper Details

Date Published: 24 July 1998
PDF: 7 pages
Proc. SPIE 3350, Astronomical Interferometry, (24 July 1998); doi: 10.1117/12.317198
Show Author Affiliations
Koichi Sato, National Astronomical Observatory of Japan (Japan)
Jun Nishikawa, National Astronomical Observatory of Japan (Japan)
Masanori Yoshizawa, National Astronomical Observatory of Japan (Japan)
Toshio Fukushima, National Astronomical Observatory of Japan (Japan)
Yoshihiro Machida, Univ. of Tokyo and National Astronomical Observatory of Japan (Japan)
Yukihiro Honma, Hosei Univ. and National Astronomical Observatory of Japan (Japan)
Ryuichiro Kuwabara, National Astronomical Observatory of Japan (Japan)
Shunsaku Suzuki, National Astronomical Observatory of Japan (Japan)
Yasuo Torii, National Astronomical Observatory of Japan (Japan)
Koichi Kubo, National Astronomical Observatory of Japan (Japan)
Ko Matsuda, National Astronomical Observatory of Japan (Japan)
Hikaru Iwashita, National Astronomical Observatory of Japan (Japan)


Published in SPIE Proceedings Vol. 3350:
Astronomical Interferometry
Robert D. Reasenberg, Editor(s)

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