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Proceedings Paper

Laser guide star adaptive optics at the Keck Observatory
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Paper Abstract

This paper describes the upgrades to the Keck II Adaptive Optics (K2 AO) system needed for laser guide star observing. The upgrade, including integration with the laser, is scheduled for completion in the winter of 2003. This upgrade includes the addition of a Low Bandwidth Wavefront Sensor (LBWFS) measuring focus and higher order terms, and a Lawrence Livermore National Lab quad-lens avalanche photodiode detector which monitors tip/tilt. Both observe a dim natural guide star. LBWFS corrections are applied as corrections to the high bandwidth wavefront sensor, which is observing the laser beacon. These subsystems drive focus stages, a deformable mirror, a tip/tilt mirror for the incoming starlight, and a tip/tilt mirror for pointing the propagating laser beam. Taken together, and in concert with the rest of the components of the K2 AO system, they provide the tools and the means to observe the universe as never before.

Paper Details

Date Published: 7 February 2003
PDF: 11 pages
Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.459500
Show Author Affiliations
Adam R. Contos, W.M. Keck Observatory (United States)
Peter L. Wizinowich, W.M. Keck Observatory (United States)
Scott K. Hartman, W.M. Keck Observatory (United States)
David Le Mignant, W.M. Keck Observatory (United States)
Christopher R. Neyman, W.M. Keck Observatory (United States)
Paul J. Stomski Jr., W.M. Keck Observatory (United States)
Douglas Summers, W.M Keck Observatory (United States)

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

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