The paper presents a theoretical and numerical study of the diffraction problem approached in the Fresnel approximation. The problem was formulated by a non-dimensional approach, which implies the definition of two non-dimensional quantities: F and In particular the parameter F is the well-known Fresnel number, whose value was usually used to classify diffraction regime. In analyzing the numerical approach some limitations imposed by the discretization arise; in particular these limitations constrain the level of sampling to be used for the diffracting field by requiring more and more elements when the diffraction conditions become more severe - i.e. increasing the dimension of the diffracting aperture and/or decreasing the distance of the plane where the diffracted field is observed.
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|Titolo:||A non-dimensional approach to diffraction phenomena in the Fresnel approximation|
BRUNO, LUIGI (Corresponding)
|Data di pubblicazione:||2011|
|Appare nelle tipologie:||1.1 Articolo in rivista|