Abstract
The scalar problem of the propagation of a plane-wave pulse behind a diaphragm is solved. The calculation is performed on the basis of the nonstationary Kirchhoff-Sommerfeld integral and decomposition of the pulse in terms of wavelets. Two types of diaphragms, circular and square, are studied. The propagation of a pulse under focusing conditions is calculated. The Green’s function of the diffraction problem for a circular opening with and without aberration-free focusing is constructed.
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