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Proceedings Paper

Angular anisoplanatism in laser guide star adaptive optics
Author(s): Marcos A. van Dam; Richard J. Sasiela; Antonin H. Bouchez; David Le Mignant; Randy D. Campbell; Jason C. Y. Chin; Scott K. Hartman; Erik M. Johansson; Robert E. Lafon; Paul J. Stomski Jr.; Douglas M. Summers; Peter L. Wizinowich
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Paper Abstract

The image quality obtained using laser guide star adaptive optics (LGS AO) is degraded by the fact that the wavefront aberrations experienced by light from the LGS and from the science object differ. In this paper we derive an analytic expression for the variance of the difference between the two wavefronts as a function of angular distance between the LGS and the science object. This error is a combination of focal anisoplanatism and angular anisoplanatism. We show that the wavefront error introduced by observing a science object displaced from the guide star is smaller for LGS AO systems than for natural guide star AO systems.

Paper Details

Date Published: 28 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627231 (28 June 2006); doi: 10.1117/12.669737
Show Author Affiliations
Marcos A. van Dam, W.M. Keck Observatory (United States)
Richard J. Sasiela, W.M. Keck Observatory (United States)
Antonin H. Bouchez, W.M. Keck Observatory (United States)
David Le Mignant, W.M. Keck Observatory (United States)
Randy D. Campbell, W.M. Keck Observatory (United States)
Jason C. Y. Chin, W.M. Keck Observatory (United States)
Scott K. Hartman, W.M. Keck Observatory (United States)
Erik M. Johansson, W.M. Keck Observatory (United States)
Robert E. Lafon, W.M. Keck Observatory (United States)
Paul J. Stomski Jr., W.M. Keck Observatory (United States)
Douglas M. Summers, W.M. Keck Observatory (United States)
Peter L. Wizinowich, W.M. Keck Observatory (United States)


Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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