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Proceedings Paper

Fast, wide-dynamic range, low-voltage tip/tilt mirror
Author(s): Kim Strohbehn; Bernard Kluga; David M. Rust
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Paper Abstract

Tip/tilt mirrors are widely used to stabilize astronomical images during integration because tip/tilt image stabilization systems provide a large gain in image quality with a relatively simple control system[KM93,Mc93,0193]. In solar vector magnetographs the polarization analysis section generally precedes the fip/tilt mirror to avoid systematic polarization errors[Ru88,R091]. This causes a magnification of the apparent pointing errors so that the dynamic range requirements for a tip/tilt mirror are multiplied by the magnification. We have used tip/tilt mirrors based on high voltage piezo electric stacks. These units have relatively limited throw of +/- 65 arcsec, and require stack voltages of 0 to 1000 volts. In addition these units displayed a high Q resonance around 200 Hz which limited the stable closed loop image stabilization bandwidth to around 20 to 30 Hz. The tip/tilt system in our ground based instrument at Sacramento Peak Observatory has always been limited by the limited dynamic range of the tip/tilt mirror[St90,St92].

Paper Details

Date Published: 5 July 1994
PDF: 4 pages
Proc. SPIE 2221, Acquisition, Tracking, and Pointing VIII, (5 July 1994);
Show Author Affiliations
Kim Strohbehn, Johns Hopkins Univ. (United States)
Bernard Kluga, Johns Hopkins Univ. (United States)
David M. Rust, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 2221:
Acquisition, Tracking, and Pointing VIII
Michael K. Masten; Larry A. Stockum; Morris M. Birnbaum; George E. Sevaston, Editor(s)

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