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Wavelet analysis of speckle patterns with a temporal carrier

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Wavelet analysis of speckle patterns with a temporal carrier

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dc.contributor.author Fu, Yu
dc.contributor.author Tay, Cho Jui
dc.contributor.author Quan, Chenggen
dc.contributor.author Miao, Hong
dc.date.accessioned 2010-11-23T07:59:25Z
dc.date.available 2010-11-23T07:59:25Z
dc.date.copyright 2005
dc.date.issued 2010-11-23T07:59:25Z
dc.identifier.citation Fu, Y., Tay, C. J., Quan, C., & Miao, H. (2005). Wavelet analysis of speckle patterns with a temporal carrier, Applied Optics, 44(6), 959-965.
dc.identifier.issn 0003-6935
dc.identifier.uri http://hdl.handle.net/10220/6468
dc.description.abstract A novel temporal phase-analysis technique that is based on wavelet analysis and a temporal carrier is presented. To measure displacement on a vibrating object by using electronic speckle pattern interferometry, one captures a series of speckle patterns, using a high-speed CCD camera. To avoid ambiguity in phase estimation, a temporal carrier is generated by a piezoelectric transducer stage in the reference beam of the interferometer. The intensity variation of each pixel on recorded images is then analyzed along the time axis by a robust mathematical tool, i.e., a complex Morlet wavelet transform. After the temporal carrier is removed, the absolute displacement of a vibrating object is obtained without the need for temporal or spatial phase unwrapping. The results obtained by a wavelet transform are compared with those from a temporal Fourier transform.
dc.format.extent 7 p.
dc.language.iso en
dc.relation.ispartofseries Applied Optics
dc.rights This paper was published in [Applied Optics] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website:[http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-44-6-959]. Systematic or multiple reproduction or distribution to multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
dc.subject DRNTU::Science::Physics::Optics and light.
dc.title Wavelet analysis of speckle patterns with a temporal carrier
dc.type Journal Article
dc.contributor.research Temasek Laboratories
dc.identifier.doi http://dx.doi.org/10.1364/AO.44.000959
dc.description.version Published version

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