An exact decomposition of the diffracted field into a direct wave and a boundary diffraction wave is obtained for an incident inhomogeneous wave, namely, the complex-source-point spherical wave. Our result, in the paraxial approximation, is consistent with already published results on the diffraction of a Gaussian beam.
© 1983 Optical Society of America
Pierre-A. Belanger and Marc Couture, "Boundary diffraction of an inhomogeneous wave," J. Opt. Soc. Am. 73, 446-450 (1983)