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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Steven A. Burns
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2980–2993

Shack–Hartmann wavefront estimation with extended sources: anisoplanatism influence

Nicolas Védrenne, Vincent Michau, Clélia Robert, and Jean-Marc Conan  »View Author Affiliations


JOSA A, Vol. 24, Issue 9, pp. 2980-2993 (2007)
http://dx.doi.org/10.1364/JOSAA.24.002980


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Abstract

Anisoplanatism limits the correction field of adaptive optics (AO). In the case of Shack–Hartmann measurement performed on extended sources it may also strongly affect wavefront estimation accuracy. An analytical formalism has been previously proposed to quantify anisoplanatism slope measurement error. It is exploited here to derive the most relevant quantity in AO, the wavefront error. Analytical and end-to-end simulation results are compared in three cases: solar observation, weakly perturbed near-to-ground observation, and strongly perturbed near-to-ground observation. In every case, anisoplanatism wavefront error takes significant values. The accuracy of the analytical model is investigated in detail. Three contributions to the slope error previously identified are considered: phase anisoplanatism, scintillation anisoplanatism, and coupling between scintillation and phase anisoplanatism. The influence of both scintillation and coupling contributions to the wavefront error is confirmed here.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7350) Atmospheric and oceanic optics : Wave-front sensing

ToC Category:
Atmospheric and oceanic optics

History
Original Manuscript: November 29, 2006
Revised Manuscript: April 19, 2007
Manuscript Accepted: May 10, 2007
Published: August 30, 2007

Citation
Nicolas Védrenne, Vincent Michau, Clélia Robert, and Jean-Marc Conan, "Shack-Hartmann wavefront estimation with extended sources: anisoplanatism influence," J. Opt. Soc. Am. A 24, 2980-2993 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-9-2980


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