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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 28, Iss. 1 — Jan. 1, 2011
  • pp: 1–7

Method of obtaining wavefront slope data from through-focus point spread function measurements

Samuel T. Thurman  »View Author Affiliations

JOSA A, Vol. 28, Issue 1, pp. 1-7 (2011)

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A method is described for analyzing point source imagery collected with various amounts of defocus to obtain wavefront slope data at the exit pupil of an imaging system. Integration of this slope data yields the system wavefront aberration function. The method is based on a geometric optics interpretation of intensity point spread function measurements in the caustic region near focus. Algorithm performance is examined through Monte Carlo simulations. Application of the method to segmented-aperture systems is also explored. The proposed method is used to generate initial wavefront estimates for an iterative phase retrieval algorithm, significantly improving the capture range over a blind phase retrieval approach when segment tilt errors are large.

© 2011 Optical Society of America

OCIS Codes
(010.7350) Atmospheric and oceanic optics : Wave-front sensing
(080.1010) Geometric optics : Aberrations (global)
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4820) Instrumentation, measurement, and metrology : Optical systems

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: June 7, 2010
Revised Manuscript: October 26, 2010
Manuscript Accepted: November 12, 2010
Published: December 14, 2010

Samuel T. Thurman, "Method of obtaining wavefront slope data from through-focus point spread function measurements," J. Opt. Soc. Am. A 28, 1-7 (2011)

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