Reference : Pre-shipment test of the ARGOS laser guide star wavefront sensor
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Pre-shipment test of the ARGOS laser guide star wavefront sensor
Bonaglia, M. [INAF - Osservatorio Astrofisico di Arcetri (Italy) > > > >]
Busoni, L. [> >]
Mazzoni, T. [> >]
Puglisi, A. [> >]
Antichi, J. [> >]
Esposito, S. [> >]
Orban De Xivry, Gilles mailto [Max-Planck-Institut für extraterrestrische Physik > > > >]
Rabien, S. [> >]
Adaptive Optics Systems IV
Proceedings of SPIE, volume 9148
SPIE Astronomical Telescopes and Instrumentation 2014
Sunday - Friday 22 - 27 June 2014
[en] We present the results of the laboratory characterization of the ARGOS LGS wavefront sensor (LGSW) and dichroic units. ARGOS is the laser guide star adaptive optics system of the Large Binocular Telescope (LBT). It implements a Ground Layer Adaptive Optics (GLAO) correction for LUCI, an infrared imager and multi-object spectrograph (MOS), using 3 pulsed Rayleigh beacons focused at 12km altitude. The LGSW is a Shack-Hartman sensor having 15 × 15 subaspertures over the telescope pupil. Each LGS is independently stabilized for on-sky jitter and gated to reduce spot elongation. The 3 LGS pupils are stabilized to compensate mechanical flexure and are arranged on a single detector. Two units of LGSW have been produced and tested at Arcetri Observatory. We report on the results obtained in the pre-shipment laboratory test: internal active flexure compensation loop performance, optomechanical stability under different gravity conditions, thermal cycling, Pockels cells performance. We also update on the upcoming installation and commissioning campaign at LBT.
Copyright 2014 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

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