2005
DOI: 10.1364/opex.13.008469
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Equivalent functions for the Fresnel integral

Abstract: Fresnel integral is modeled with three equivalent functions. The first function is derived by considering the sum of the first term of the Fresnel integral's asymptotic expansion {F(x)} and an exponential function which approaches to infinity at the zero of the Fresnel function's argument and has the properties of a unit step function. The second one is the sum of a unit step function and the transition function defined for the simplified uniform theory of diffraction. The third function considers directly eli… Show more

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Cited by 67 publications
(27 citation statements)
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“…where the first term is the exact GO and the second one is the exact diffracted waves [3]. I hope this example will be enough to enlighten Hacivelioglu and co-authors on the terminology that I used in [2].…”
Section: Our Rebuttals On Wave Terminologymentioning
confidence: 94%
See 1 more Smart Citation
“…where the first term is the exact GO and the second one is the exact diffracted waves [3]. I hope this example will be enough to enlighten Hacivelioglu and co-authors on the terminology that I used in [2].…”
Section: Our Rebuttals On Wave Terminologymentioning
confidence: 94%
“…b) Hacivelioglu and co-workers try to support their claims with false references. For example References [3] and [6] of [1]. In those references, Umul does not deal with PTD or fringe fields, but authors cite these papers in order to support their wrong claims about Eq.…”
Section: Rebuttal Of Examplesmentioning
confidence: 99%
“…On the other hand, to evaluate Fresnel integrals for high values of | |, the solution is resort to the expansion in terms of Bessel functions [14,15]. Besides, in [16], one of the performed approximations was made by the sum of the first term of the Fresnel integrals asymptotic expansion and an exponential function which approaches infinity at the zero of Fresnel function argument.…”
Section: Mathematical Problems In Engineeringmentioning
confidence: 99%
“…The incident field will become in the positive x 1 and negative y 1 directions. It has the expression of u i (P) = e −jk cos( 1 +˛0) (19) in terms of the second face's coordinate system. Note that a minus sign does not added in the amplitude of the incident wave, because it is not image.…”
Section: Wedge With Double Faces Illuminatedmentioning
confidence: 99%
“…with this aim for x 1 [18,19]. sign(x) is the signum function, which is equal to 1 for x > 0 and −1 otherwise.…”
Section: Asymptotic Evaluation Of the Scattering Integralsmentioning
confidence: 99%