Journal ArticleDOI
Fresnel diffraction at an opaque strip expressed by means of asymptotic representations of Fresnel integrals.
Petr Šmíd,Pavel Horvath +1 more
TLDR
The paper presents an asymptotic expression of relative intensity distribution in a Fresnel diffraction pattern at an opaque straight strip illuminated with a spherical wave and shows sinusoidal behavior, which can be used in easy location of maxima or minima of the relative intensity.Abstract:
The paper presents an asymptotic expression of relative intensity distribution in a Fresnel diffraction pattern at an opaque straight strip illuminated with a spherical wave. The asymptotic expression is used in an analysis showing an area of validity where the asymptotic expression reduces to an asymptotic expression of relative intensity distribution in a Fresnel diffraction at a half plane. The area of validity is defined through width of the geometrical shadow in a Fresnel diffraction pattern at an opaque straight strip and distance of a point under study to the center of the Fresnel diffraction pattern. Within this area, relative intensity in the Fresnel diffraction pattern at an opaque straight strip shows sinusoidal behavior, which can be used in easy location of maxima or minima of the relative intensity. The result of the analysis is supported by experiments realized in the area of validity and outside it.read more
Citations
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Diffraction by Dielectric-Loaded Multiple Slits in a Conducting Plane: TM Case
TL;DR: In this article, a new exact series solution for the scattering and coupling problems by dielectric-loaded multiple slits in a perfectly conducting screen is presented, where the scattered and transmitted flelds are represented in terms of an inflnite series of radial modes.
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Non-invasive monitoring of hydraulic surge propagation in a wounded tobacco plant.
TL;DR: This optical method represents a novel tool to investigate the mechanism of systemic response of plants to local damage and points out the complexity of the relationship between hydraulic surge propagation and stem deformation.
References
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Journal ArticleDOI
Computation of Fresnel Integrals.
TL;DR: This paper describes a method for spreadsheet computations of Fresnel integrals to six significant figures, based on successive improvements of known rational approximations which are accurate to only three figures.
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Computer simulation of Fresnel diffraction from rectangular apertures and obstacles using the Fresnel integrals approach
TL;DR: In this paper, the authors describe a new computer simulation technique of generating Fresnel diffraction images from rectangular apertures of arbitrary dimensions by using Fresnel integrals instead of the more common fast Fourier transform methods.
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Exact solutions for electromagnetic wave diffraction by a slot and strip
TL;DR: In this paper, the exact solution for two-dimensional electromagnetic wave diffraction by a slot in the plane perfectly conducting screen with infinitesimal thickness and by a complementary strip is described.
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Diffraction of a gaussian beam around a strip mask.
TL;DR: A theoretical treatment is given for the diffraction of a Gaussianbeam around an opaque strip mask and predictions show good agreement with measurements on thediffraction patterns from wires.