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Optical Engineering

Efficient computation of near-field diffraction patterns by means of subsampled convolution [also Erratum 33(4)1368(Apr1994)]
Author(s): Dan Owen Harris
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Paper Abstract

We introduce subsampled convolution and convolution with an aggregate kernel as computationally efficient techniques for discrete convolution of the free-space propagation kernel with generalized and rectangular aperture functions, respectively, in computing near-field diffraction patterns. We develop fast Fourier transform based algorithms for implementing subsampled and aggregate kernel convolution, then demonstrate the memory and execution time economy of these techniques through computational examples.

Paper Details

Date Published: 1 January 1994
PDF: 5 pages
Opt. Eng. 33(1) doi: 10.1117/12.149147
Published in: Optical Engineering Volume 33, Issue 1
Show Author Affiliations
Dan Owen Harris, Siecor Corp. (United States)

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