Vortex metrology using Fourier analysis techniques: vortex networks correlation fringes.

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dc.citation.journalTitleApplied Opticseng
dc.contributor.authorAngel-Toro, Luciano
dc.contributor.authorSierra-Sosa, Daniel
dc.contributor.authorTebaldi, Myrian
dc.contributor.authorBolognini, Nestor
dc.contributor.departmentUniversidad EAFIT. Departamento de Ciencias Básicasspa
dc.contributor.researchgroupÓptica Aplicadaspa
dc.date.accessioned2021-04-12T14:17:29Z
dc.date.available2021-04-12T14:17:29Z
dc.date.issued2012-10-20
dc.description.abstractIn this work, we introduce an alternative method of analysis in vortex metrology based on the application of the Fourier optics techniques. The first part of the procedure is conducted as is usual in vortex metrology for uniform in-plane displacement determination. On the basis of two recorded intensity speckled distributions, corresponding to two states of a diffuser coherently illuminated, we numerically generate an analytical signal from each recorded intensity pattern by using a version of the Riesz integral transform. Then, from each analytical signal, a two-dimensional pseudophase map is generated in which the vortices are located and characterized in terms of their topological charges and their core's structural properties. The second part of the procedure allows obtaining Young's interference fringes when Fourier transforming the light passing through a diffracting mask with multiple apertures at the locations of the homologous vortices. In fact, we use the Fourier transform as a mathematical operation to compute the far-field diffraction intensity pattern corresponding to the multiaperture set. Each aperture from the set is associated with a rectangular hole that coincides both in shape and size with a pixel from recorded images. We show that the fringe analysis can be conducted as in speckle photography in an extended range of displacement measurements. Effects related with speckled decorrelation are also considered. Our experimental results agree with those of speckle photography in the range in which both techniques are applicable.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1342
dc.identifier.doi10.1364/AO.51.007411
dc.identifier.issn1559128X
dc.identifier.issn21553165
dc.identifier.otherWOS;000310430900037
dc.identifier.otherPUBMED;23089799
dc.identifier.urihttp://hdl.handle.net/10784/27917
dc.languageeng
dc.language.isoengeng
dc.publisherOPTICAL SOC AMER
dc.relation.urihttps://www.osapublishing.org/ao/abstract.cfm?uri=ao-51-30-7411
dc.rightshttps://v2.sherpa.ac.uk/id/publication/issn/1559-128X
dc.sourceApplied Optics
dc.subject.keywordLaser Speckle Interferometryeng
dc.subject.keywordPhase Singularitieseng
dc.subject.keywordDisplacement Measurementeng
dc.subject.keywordStrain Analysiseng
dc.subject.keywordAperture Methodeng
dc.subject.keywordPhotographyeng
dc.subject.keywordPatterneng
dc.titleVortex metrology using Fourier analysis techniques: vortex networks correlation fringes.eng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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