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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

  • Vol. 13, Iss. 5 — May. 1, 1996
  • pp: 1057–1067

Angular correlation function based on the second-order Kirchhoff approximation and comparison with experiments

Charlie T. C. Le, Yasuo Kuga, and Akira Ishimaru  »View Author Affiliations


JOSA A, Vol. 13, Issue 5, pp. 1057-1067 (1996)
http://dx.doi.org/10.1364/JOSAA.13.001057


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Abstract

The angular correlation function (ACF) of scattering amplitudes is presented using the second-order Kirchhoff approximation (KA) with angular and propagation shadowing functions. The theory is applicable to surfaces with large radii of curvature and high slopes of the order of unity. The correlation consists of contributions from single and second-order scattering. The single scattering provides the necessary condition for substantial correlation to occur. The second-order scattering yields high peaks in the correlation function. The ladder term gives a peak when two waves that have the same incident and scattering angles are traveling in the same direction. The cyclic term gives another peak in the time-reversed direction. These two peaks are related by the reciprocity condition. Although the second-order KA contains several approximations and the solution is simplified to yield a numerically tractable form, its agreement with experimental results is excellent. The theory correctly shows the peaks in the ACF observed in both co-polarization and cross-polarization responses. The width of the memory line is also very close to the value predicted by the theory.

© 1996 Optical Society of America

History
Original Manuscript: August 3, 1995
Revised Manuscript: October 26, 1995
Manuscript Accepted: October 31, 1995
Published: May 1, 1996

Citation
Charlie T. C. Le, Yasuo Kuga, and Akira Ishimaru, "Angular correlation function based on the second-order Kirchhoff approximation and comparison with experiments," J. Opt. Soc. Am. A 13, 1057-1067 (1996)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-13-5-1057

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