Development of the optical and infrared interferometer MIRA-I.2

Details Development of the optical and infrared interferometer MIRA-I.2 Development of the optical and infrared interferometer MIRA-I.2

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3350..212s&link_type=abstract

Proc. SPIE Vol. 3350, p. 212-218, Astronomical Interferometry, Robert D. Reasenberg; Ed.

Physics

Optics

2

Scientific paper

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 D(subscript 1) equals 200mm and D(subscript 2) 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.

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