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Proceedings Paper

Wide-field AO correction: the large wavefront sensor detector of ARGOS
Author(s): Gilles Orban de Xivry; Sebastian Rabien; Lothar Barl; Simone Esposito; Wolfgang Gaessler; Michael Hart; Matthias Deysenroth; Hans Gemperlein; Lothar Strüder; Julian Ziegleder
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Paper Abstract

Wide field correction allowing large field to benefit from adaptive optics (AO) is challenging in more than one aspect. We address here the wavefront sensor (WFS) detector side where, in addition to high sensitivity and low noise, the simultaneous detection of multiple laser beacons and the large number of sub-apertures in a Shack-Hartmann WFS require a detector to have a large imaging area while preserving a very high readout frame rate. The detector considered has a frame area of 264×264 pixels with a pixel size of 48 microns. By splitting the image into two framestore areas during readout, repetition rates of more than 1000 frames per second can be achieved. The electronic noise contribution is approximately 3 electrons at the operating temperature. We therefore analyze its performances, showing it fulfills the requirements, in a wavefront sensing application: the measurement of centroids in the case of a Shack-Hartmann WFS for the Argos AO project.

Paper Details

Date Published: 28 July 2010
PDF: 10 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 77365C (28 July 2010); doi: 10.1117/12.857230
Show Author Affiliations
Gilles Orban de Xivry, Max-Planck-Institut für extraterrestrische Physik (Germany)
Sebastian Rabien, Max-Planck-Institut für extraterrestrische Physik (Germany)
Lothar Barl, Max-Planck-Institut für extraterrestrische Physik (Germany)
Simone Esposito, Osservatorio Astrofisico di Arcetri (Italy)
Wolfgang Gaessler, Max-Planck-Institut für Astronomie (Germany)
Michael Hart, Steward Observatory, The Univ. of Arizona (United States)
Matthias Deysenroth, Max-Planck-Institut für extraterrestrische Physik (Germany)
Hans Gemperlein, Max-Planck-Institut für extraterrestrische Physik (Germany)
Lothar Strüder, Max-Planck-Institut Halbleiterlabor (Germany)
Julian Ziegleder, Max-Planck-Institut für extraterrestrische Physik (Germany)

Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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