Abstract
Numerical propagation of scalar fields within thin annuli over short distances demands very high sampling density when employing techniques which evaluate the Fresnel-Kirchhoff integral. Previous work on using asymptotic expansion methods has been limited to field distributions which display a high degree of azimuthal symmetry. This paper describes an extension of the approach to more asymmetric field distributions. The resolution requirements for this technique are discussed and some numerical results are presented. The problem of propagating thin annular scalar field distributions over short distances lends itself to very high fresnel number configurations and consequently requires high resolution sample density. The fresnel number is defined as© (1982) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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