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Proceedings Paper

Vibration control for the ARGOS laser launch path
Author(s): Diethard Peter; Wolfgang Gässler; Jose Borelli; Lothar Barl; S. Rabien
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Paper Abstract

Present and future adaptive optics systems aim for the correction of the atmospheric turbulence over a large field of view combined with large sky coverage. To achieve this goal the telescope is equipped with multiple laser beacons. Still, to measure tip-tilt aberrations a natural guide star is used. For some fields such a tilt-star is not available and a correction on the laser beacons alone is applied. For this method to work well the laser beacons must not be affected by telescope vibrations on their up-link path. For the ARGOS system the jitter of the beacons is specified to be below 0.05. To achieve this goal a vibration compensation system is necessary to mitigate the mechanical disturbances. The ARGOS vibration compensation system is an accelerometer based feed forward system. The accelerometer measurements are fed into a real time controller. To achieve high performance the controller of the system is model based. The output is applied to a fast steering mirror. This paper presents the concept of the ARGOS vibration compensation, the hardware, and laboratory results.

Paper Details

Date Published: 13 September 2012
PDF: 8 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84474J (13 September 2012); doi: 10.1117/12.926042
Show Author Affiliations
Diethard Peter, Max-Planck-Institut für Astronomie (Germany)
Wolfgang Gässler, Max-Planck-Institut für Astronomie (Germany)
Jose Borelli, Max-Planck-Institut für Astronomie (Germany)
Lothar Barl, Max-Planck-Institut für extraterrestrische Physik (Germany)
S. Rabien, Max-Planck-Institut für extraterrestrische Physik (Germany)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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