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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. 17, Iss. 5 — May. 1, 2000
  • pp: 874–880

Second-order iterative approach to inverse scattering: numerical results

Rocco Pierri, Giovanni Leone, and Raffaele Persico  »View Author Affiliations


JOSA A, Vol. 17, Issue 5, pp. 874-880 (2000)
http://dx.doi.org/10.1364/JOSAA.17.000874


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Abstract

We introduce an iterative algorithm for the reconstruction of dielectric profile functions from scattered field data, in which each step corresponds to the solution of a quadratic inversion problem. This means that, at each iteration, we perform a second-order approximation of the scattering operator connecting the unknown profile to the data about a reference profile function. This procedure is then compared with a linear iterative inversion algorithm, and it is pointed out that, within a prescribed class of profile functions, the linear iterative inversion does not converge to the actual solution, whereas the proposed approach does. This feature can be explained by reference not only to the improved approximation provided by the addition of a further term for profile functions of a larger norm but also to the different classes of functions that can be reconstructed by either the linear or the quadratic model. Numerical examples of profile reconstruction in the scalar two-dimensional geometry, with far-zone scattered field data at a fixed frequency, confirm the theoretical analysis.

© 2000 Optical Society of America

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

Citation
Rocco Pierri, Giovanni Leone, and Raffaele Persico, "Second-order iterative approach to inverse scattering: numerical results," J. Opt. Soc. Am. A 17, 874-880 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-5-874


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