title: Algorithms for Fresnel Diffraction at Rectangular and Circular Apertures.
abstract: This paper summarizes the theory of Fresnel diffraction by plane rectangular and circular apertures with a view toward numerical computations. Approximations found in the earlier literature, and now obsolete, have been eliminated and replaced by algorithms suitable for use on a personal computer.
authors.affiliation: Oakland, MD 21550.
authors.forename: Klaus D
authors.initials: KD
authors.lastname: Mielenz
keywords: Fresnel approximation; algorithms; circular apertures; diffraction; personal computers; radiometry; rectangular apertures; slits