Scalar beam diffraction by a wide circular aperture
- 1 October 1988
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 5 (10) , 1629-1634
- https://doi.org/10.1364/josaa.5.001629
Abstract
The complex-source-point technique and the geometrical theory of diffraction constitute a powerful combination for the rigorous solution of high-frequency diffraction problems. Here scalar diffraction by a beam normally incident upon a circular aperture is analyzed, a situation involving shadow boundaries, multiple diffraction, and an axial caustic. The result is a simple and accurate uniform solution that satisfies the boundary conditions in the aperture plane. Numerical results are shown for a circular aperture of radius 1.5λ and incident beams of varying directivity.Keywords
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