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Proceedings Paper

Closed-loop control for tip-tilt compensation on systems under vibration
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Paper Abstract

Mechanical vibrations affect the performance in modern adaptive optics systems. These structural vibrations induce aberration mainly in tip-tilt modes that reduce the accuracy of the astronomical instrument. Therefore, control actions need to be taken. With this purpose we present a laboratory demonstration of vibration rejection of tip-tilt modes using closed-loop control, inducing vibration on the test bench via an eccentric motor with controllable frequency, in order to simulate the structural vibrations mentioned above. We measure the laser vibration and its tip-tilt aberration using a camera and a Shack Hartmann Wave Front Sensor. The control action is carried out by a Fast Steering Mirror (FSM).

Paper Details

Date Published: 27 July 2016
PDF: 6 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99093K (27 July 2016); doi: 10.1117/12.2232215
Show Author Affiliations
Mario Castro, Univ. Técnica Federico Santa María (Chile)
Pedro Escárate, Univ. Técnica Federico Santa María (Chile)
Javier Garcés, Univ. Técnica Federico Santa María (Chile)
Sebastián Zúñiga, Univ. Técnica Federico Santa María (Chile)
Diego Rojas, Univ. Técnica Federico Santa María (Chile)
José Marchioni, Univ. Técnica Federico Santa María (Chile)
Andrés Guesalaga, Pontificia Univ. Católica de Chile (Chile)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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