Share Email Print
cover

Proceedings Paper

Wavefront tilt correction system for MIRA-1.2
Author(s): Naoko Ohishi; Ko Matsuda; Yasuo Torii; Jun Nishikawa; Masanori Yoshizawa; Koichi Sato; Koichi Kubo; Hikaru Iwashita; Takayuki Kotani; Toshio Fukushima
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The outline and the performance of the wavefront tilt correction system for the Mitaka optical and InfraRed Array, MIRA-I.2, is reported. The tilt control system consists of quadrant detectors and PZT-driven tilt mirrors. These components are controlled by three computers connected via local area network system. The control loop frequency of 2660Hz is achieved and this high loop frequency enables the stable operation of the control system with a bandwidth of approximately 80Hz in open loop at 0dB. Preliminary results of one night observation of α Lyr showed that this system suppress the relative wavefront tilt of incoming lights to 0.46 arcsec while it is 1.9 arcsec without control. With an aperture size of 90 mm and the wavelength of 750 nm, this means the tilt control system improves the visibility loss to 9% while it is 89% without control.

Paper Details

Date Published: 21 February 2003
PDF: 12 pages
Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003); doi: 10.1117/12.458086
Show Author Affiliations
Naoko Ohishi, National Astronomical Observatory of Japan (United States)
Ko Matsuda, National Astronomical Observatory of Japan (Japan)
Yasuo Torii, National Astronomical Observatory of Japan (Japan)
Jun Nishikawa, National Astronomical Observatory of Japan (Japan)
Masanori Yoshizawa, National Astronomical Observatory of Japan (Japan)
Koichi Sato, National Astronomical Observatory of Japan (Japan)
Koichi Kubo, National Astronomical Observatory of Japan (Japan)
Hikaru Iwashita, National Astronomical Observatory of Japan (Japan)
Takayuki Kotani, National Astronomical Observatory of Japan (Japan)
Toshio Fukushima, National Astronomical Observatory of Japan (Japan)


Published in SPIE Proceedings Vol. 4838:
Interferometry for Optical Astronomy II
Wesley A. Traub, Editor(s)

© SPIE. Terms of Use
Back to Top