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Proceedings Paper

NAOS: from an AO system to an astronomical instrument
Author(s): Francois Lacombe; Gerard Zins; Julien Charton; G. Chauvin; Guillaume Dumont; Philippe Feautrier; Thierry Fusco; Eric Gendron; Norbert N. Hubin; Pierre Y. Kern; Anne-Marie Lagrange; David Mouillet; Pascal Puget; Didier Rabaud; Patrick Rabou; Gerard Rousset; Jean-Luc Beuzit
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Paper Abstract

Observing at high angular resolution from the ground is not made possible with Adaptive Optics alone, and besides the turbulence residuals, atmospheric refraction, thermal background or instrument's mechanical flexures may also severely limit the gain of optical quality that AO techniques are supposed to provide. We describe here how NAOS, the newly installed AO system on the VLT, has been designed to accommodate for these unavoidable effects. In particular, beam chopping, flexures compensation and AO tracking on reference objects with a significant relative motion will be addressed. It will thus be shown how long term astronomical observations at the diffraction limit can be carried out with an AO system under regular ground level conditions, thanks to the implementation of original technical solutions.

Paper Details

Date Published: 7 February 2003
PDF: 5 pages
Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.459739
Show Author Affiliations
Francois Lacombe, Observatoire de Paris-Meudon/LESIA (France)
Gerard Zins, European Southern Observatory (Germany)
Julien Charton, Observatoire de Grenoble/UJF (France)
G. Chauvin, Observatoire de Grenoble/UJF (France)
Guillaume Dumont, ONERA (France)
Philippe Feautrier, Observatoire de Grenoble/UJF (France)
Thierry Fusco, ONERA (France)
Eric Gendron, Observatoire de Paris-Meudon/LESIA (France)
Norbert N. Hubin, European Southern Observatory (Germany)
Pierre Y. Kern, Observatoire de Grenoble/UJF (France)
Anne-Marie Lagrange, Observatoire de Grenoble/UJF (France)
David Mouillet, Observatoire de Grenoble/UJF (France)
Pascal Puget, Observatoire de Grenoble/UJF (France)
Didier Rabaud, SHAKTIWARE/ONERA (France)
Patrick Rabou, Observatoire de Grenoble/UJF (France)
Gerard Rousset, ONERA (France)
Jean-Luc Beuzit, Observatoire de Grenoble/UJF (France)

Published in SPIE Proceedings Vol. 4839:
Adaptive Optical System Technologies II
Peter L. Wizinowich; Domenico Bonaccini, Editor(s)

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