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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 21, Iss. 6 — Jun. 1, 2004
  • pp: 968–974

Imaging of voids by means of a physical-optics-based shape-reconstruction algorithm

Angelo Liseno and Rocco Pierri  »View Author Affiliations

JOSA A, Vol. 21, Issue 6, pp. 968-974 (2004)

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We analyze the performance of a shape-reconstruction algorithm for the retrieval of voids starting from the electromagnetic scattered field. Such an algorithm exploits the physical optics (PO) approximation to obtain a linear unknown-data relationship and performs inversions by means of the singular-value-decomposition approach. In the case of voids, in addition to a geometrical optics reflection, the presence of the lateral wave phenomenon must be considered. We analyze the effect of the presence of lateral waves on the reconstructions. For the sake of shape reconstruction, we can regard the PO algorithm as one of assuming the electric and magnetic field on the illuminated side as constant in amplitude and linear in phase, as far as the dependence on the frequency is concerned. Therefore we analyze how much the lateral wave phenomenon impairs such an assumption, and we show inversions for both one single and two circular voids, for different values of the background permittivity.

© 2004 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(100.3190) Image processing : Inverse problems
(290.3200) Scattering : Inverse scattering

Original Manuscript: June 30, 2003
Revised Manuscript: November 17, 2003
Manuscript Accepted: November 17, 2003
Published: June 1, 2004

Angelo Liseno and Rocco Pierri, "Imaging of voids by means of a physical-optics-based shape-reconstruction algorithm," J. Opt. Soc. Am. A 21, 968-974 (2004)

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