Publicação:
Progressive power lens measurement by low coherence speckle interferometry

dc.contributor.authorBarbosa, E. A. [UNESP]
dc.contributor.authorSilva, D. M. [UNESP]
dc.contributor.authorNascimento, C. E. [UNESP]
dc.contributor.authorGalvão, F. L. [UNESP]
dc.contributor.authorMittani, J. C R [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:49Z
dc.date.available2014-05-27T11:29:49Z
dc.date.issued2013-07-01
dc.description.abstractThis work proposes a method for dioptric power mapping of progressive lenses through dual wavelength, low-coherence digital speckle pattern interferometry. Lens characterization finds several applications and is extremely useful in the fields of ophthalmology and astronomy, among others. The optical setup employs two red diode lasers which are conveniently aligned and tuned in order to generate a synthetic wavelength. The resulting speckle image formed onto a diffusive glass plate positioned behind the test lens appears covered of contour interference fringes describing the deformation on the light wavefront due to the analyzed lens. By employing phase stepping and phase unwrapping methods the wavefront phase was retrieved and then expressed in terms of a Zernike series. From this series, expressions for the dioptric power and astigmatic power were derived as a function of the x- and y-coordinates of the lens aperture. One spherical and two progressive lenses were measured. The experimental results presented a good agreement with those obtained through a commercial lensometer, showing the potentialities of the method. © 2013 Elsevier Ltd.en
dc.description.affiliationLaboratório de Óptica Aplicada Faculdade de Tecnologia de São Paulo CEETEPS-UNESP, Pça Cel Fernando Prestes, 30, CEP 01124 060, São Paulo
dc.description.affiliationUnespLaboratório de Óptica Aplicada Faculdade de Tecnologia de São Paulo CEETEPS-UNESP, Pça Cel Fernando Prestes, 30, CEP 01124 060, São Paulo
dc.format.extent898-906
dc.identifierhttp://dx.doi.org/10.1016/j.optlaseng.2013.02.007
dc.identifier.citationOptics and Lasers in Engineering, v. 51, n. 7, p. 898-906, 2013.
dc.identifier.doi10.1016/j.optlaseng.2013.02.007
dc.identifier.issn0143-8166
dc.identifier.scopus2-s2.0-84875721100
dc.identifier.scopus2-s2.0-84874815219
dc.identifier.urihttp://hdl.handle.net/11449/75773
dc.identifier.wosWOS:000317888200015
dc.language.isoeng
dc.relation.ispartofOptics and Lasers in Engineering
dc.relation.ispartofjcr3.388
dc.relation.ispartofsjr1,018
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectLens measurement
dc.subjectProgressive lenses
dc.subjectSpeckle interferometry
dc.subjectDigital speckle pattern interferometry
dc.subjectInterference fringe
dc.subjectLow coherence speckle interferometries
dc.subjectPhase unwrapping methods
dc.subjectRed diode lasers
dc.subjectSynthetic wavelength
dc.subjectWave-front phase
dc.subjectWavefronts
dc.subjectSpeckle
dc.titleProgressive power lens measurement by low coherence speckle interferometryen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dspace.entity.typePublication

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