15 July 2010 Diffraction limited operation with ARGOS: a hybrid AO system
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Abstract
ARGOS, the Laser Guide Star (LGS) facility of the Large Binocular Telescope (LBT), implements a Ground Layer Adaptive Optics (GLAO) system, using 3 low-altitude beacons, to improve the resolution over the 4'×4' FoV of the imager and Multi Object Spectrograph (MOS) LUCIFER. In this paper we discuss the performance and the reconstruction scheme of an hybrid AO system using the ARGOS Rayleigh beacons complemented with a single faint high-altitude star (NGS or sodium beacon) to sense the turbulence of the upper atmosphere allowing an high degree of on-axis correction. With the ARGOS system, the NGS-upgrade can be immediately implemented at LBT using the already existing Pyramid WFS offering performance similar to the NGS AO system with the advantage of a larger sky coverage.
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M. Bonaglia, M. Bonaglia, L. Busoni, L. Busoni, F. Quirós-Pacheco, F. Quirós-Pacheco, S. Esposito, S. Esposito, } "Diffraction limited operation with ARGOS: a hybrid AO system", Proc. SPIE 7736, Adaptive Optics Systems II, 77362W (15 July 2010); doi: 10.1117/12.858209; https://doi.org/10.1117/12.858209
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