Angular anisoplanatism in laser guide star adaptive optics | Zendy

Marcos A. van Dam | Zendy; Richard J. Sasiela | Zendy; Antonin H. Bouchez | Zendy; D. Le Mignant | Zendy; Randy Campbell | Zendy; Jason Chin | Zendy; Scott Hartman | Zendy; Erik M. Johansson | Zendy; Robert Lafon | Zendy; Paul J. Stomski | Zendy; Douglas M. Summers | Zendy; Peter Wizinowich | Zendy

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Angular anisoplanatism in laser guide star adaptive optics

Author(s) -

Marcos A. van Dam,

Richard J. Sasiela,

Antonin H. Bouchez,

D. Le Mignant,

Randy Campbell,

Jason Chin,

Scott Hartman,

Erik M. Johansson,

Robert Lafon,

Paul J. Stomski,

Douglas M. Summers,

Peter Wizinowich

Publication year - 2006

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.669737

Subject(s) - wavefront , adaptive optics , guide star , optics , physics , laser guide star , deformable mirror , wavefront sensor , laser , angular diameter , star (game theory) , computer science , astronomy , astrophysics , stars

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 dier. In this paper we derive an analytic expression for the variance of the dierence 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.

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