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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 1 — Jan. 1, 2009
  • pp: A35–A46

Effect of anisoplanatism on the measurement accuracy of an extended-source Hartmann–Shack wavefront sensor

Friedrich Wöger and Thomas Rimmele  »View Author Affiliations

Applied Optics, Vol. 48, Issue 1, pp. A35-A46 (2009)

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We analyze the effect of anisoplanatic atmospheric turbulence on the measurement accuracy of an extended-source Hartmann–Shack wavefront sensor (HSWFS). We have numerically simulated an extended-source HSWFS, using a scenery of the solar surface that is imaged through anisoplanatic atmospheric turbulence and imaging optics. Solar extended-source HSWFSs often use cross-correlation algorithms in combination with subpixel shift finding algorithms to estimate the wavefront gradient, two of which were tested for their effect on the measurement accuracy. We find that the measurement error of an extended-source HSWFS is governed mainly by the optical geometry of the HSWFS, employed subpixel finding algorithm, and phase anisoplanatism. Our results show that effects of scintillation anisoplanatism are negligible when cross-correlation algorithms are used.

© 2008 Optical Society of America

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

Original Manuscript: July 11, 2008
Revised Manuscript: September 30, 2008
Manuscript Accepted: September 30, 2008
Published: October 31, 2008

Friedrich Wöger and Thomas Rimmele, "Effect of anisoplanatism on the measurement accuracy of an extended-source Hartmann-Shack wavefront sensor," Appl. Opt. 48, A35-A46 (2009)

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