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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. 12, Iss. 6 — Jun. 1, 1995
  • pp: 1254–1260

Relation between the Rayleigh equation in diffraction theory and the equation based on Green’s formula

V. I. Tatarskii  »View Author Affiliations


JOSA A, Vol. 12, Issue 6, pp. 1254-1260 (1995)
http://dx.doi.org/10.1364/JOSAA.12.001254


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Abstract

The steps necessary to produce the Rayleigh equation that is based on the Rayleigh hypothesis from the equation that is based on the Green’s formula are shown. First a definition is given for the scattering amplitude that is true not only in the far zone of diffraction but also near the scattering surface. With this definition the Rayleigh equation coincides with the rigorous equation for the surface secondary sources that is based on Green’s formula. The Rayleigh hypothesis is equivalent to substituting the far-zone expression of the scattering amplitude into this rigorous equation. In this case it turns out to be the equation not for the sources but directly for the scattering amplitude, which is the main advantage of this method. For comparing the Rayleigh equation with the initial rigorous equation, the Rayleigh equation is represented in terms of secondary sources. The kernel of this equation contains an integral that converges for positive and diverges for negative values of some parameter. It is shown that if we regularize this integral, defining it for the negative values of this parameter as an analytical continuation from the domain of positive values, this kernel becomes equal to the kernel of the initial rigorous equation. It follows that the formal perturbation series for the scattering amplitude obtained from the Rayleigh equation and from Green’s equation always coincide. This means that convergence of the perturbation series is a sufficient condition for the scattering amplitude obtained from the Rayleigh hypothesis to be true.

© 1995 Optical Society of America

History
Original Manuscript: February 25, 1994
Revised Manuscript: November 14, 1994
Manuscript Accepted: January 5, 1995
Published: June 1, 1995

Citation
V. I. Tatarskii, "Relation between the Rayleigh equation in diffraction theory and the equation based on Green’s formula," J. Opt. Soc. Am. A 12, 1254-1260 (1995)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-12-6-1254

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