Abstract
By means of an approximate method formerly published by this author, diffraction by an aperture in a screen, which is not plane, is discussed. For the special case of a circular aperture in a funnel-shaped screen, the diffraction field on the axis behind the screen is computed for an incident scalar plane wave (different boundary conditions) and for an incident electromagnetic plane wave propagating in the direction of the axis.
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Braunbek, W. Zur Beugung an öffnungen in nichtebenen Schirmen. Z. Physik 156, 66–77 (1959). https://doi.org/10.1007/BF01332516
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DOI: https://doi.org/10.1007/BF01332516