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Proceedings Paper

Laboratory characterization of the ARGOS laser wavefront sensor
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Paper Abstract

In this paper we present the integration status of the ARGOS wavefront sensor and the results of the closed loop tests performed in laboratory. ARGOS is the laser guide star adaptive optics system of the Large Binocular Telescope. It is designed to implement a Ground Layer Adaptive Optics correction for LUCI, an infrared imaging camera and multi-object spectrograph, using 3 pulsed Rayleigh beacons focused at 12km altitude. The WFS is configured as a Shack-Hartman sensor having a 15 x 15 subaspertures over the telescope pupil. In the WFS each LGS is independently stabilized for on-sky jitter and range-gated to reduce spot elongation. The 3 LGS are arranged on a single lenslet array and detector by the use of off-axis optics in the final part of the WFS. The units of WFS are in the integration and testing phase at Arcetri Observatory premises. We describe here the test aimed to demonstrate the functionality of the WFS in an adaptive optics closed loop performed using the internal light sources of the WFS and a MEMS deformable mirror.

Paper Details

Date Published: 13 September 2012
PDF: 11 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84476B (13 September 2012); doi: 10.1117/12.925742
Show Author Affiliations
Marco Bonaglia, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Lorenzo Busoni, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Luca Carbonaro, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Fernando Quiròs Pacheco, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Marco Xompero, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Simone Esposito, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Gilles Orban de Xivry, Max-Planck-Institut für extraterrestrische Physik (Germany)
Sebastian 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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