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Wavelet analysis of digital shearing speckle patterns with a temporal carrier

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Wavelet analysis of digital shearing speckle patterns with a temporal carrier

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dc.contributor.author Quan, Chenggen
dc.contributor.author Fu, Yu
dc.contributor.author Miao, Hong
dc.date.accessioned 2011-01-25T08:43:03Z
dc.date.available 2011-01-25T08:43:03Z
dc.date.copyright 2006
dc.date.issued 2011-01-25T08:43:03Z
dc.identifier.citation Quan, C., Yu, F., & Miao, H. (2006). Wavelet analysis of digital shearing speckle patterns with a temporal carrier. Optics Communications, 260(1), 97-104.
dc.identifier.issn 0030-4018
dc.identifier.uri http://hdl.handle.net/10220/6702
dc.description.abstract Shearography is an optical technique allows direct measurement of deflection derivatives. This paper presents a novel temporal phase analysis technique based on wavelet transform when shearography is applied to measure a continuously deforming object. A series of shearing speckle patterns is captured by a high-speed camera during the deformation. To avoid the phase ambiguity problem, a temporal carrier is generated by a piezoelectrical transducer (PZT) stage in one beam of the modified Michelson interferometer. The intensity variation of each pixel on recorded images is then analyzed along time axis by a robust mathematical tool - complex Morlet wavelet transform. After the temporal carrier is removed, the absolute phase change representing the first-order derivative of the continuous deformation is obtained without the need of temporal or spatial phase unwrapping process. The results obtained by wavelet transform are compared with those from temporal Fourier transform.
dc.language.iso en
dc.relation.ispartofseries Optics communications
dc.rights This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Communications, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:http://dx.doi.org/10.1016/j.optcom.2005.10.023].
dc.subject DRNTU::Science::Physics::Optics and light.
dc.title Wavelet analysis of digital shearing speckle patterns with a temporal carrier
dc.type Journal Article
dc.contributor.research Temasek Laboratories
dc.identifier.doi http://dx.doi.org/10.1016/j.optcom.2005.10.023
dc.description.version Accepted version

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