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Dual-wavelength image-plane digital holography for dynamic measurement

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Dual-wavelength image-plane digital holography for dynamic measurement

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dc.contributor.author Fu, Yu
dc.contributor.author Pedrini, Giancarlo
dc.contributor.author Hennelly, Bryan M.
dc.contributor.author Groves, Roger M.
dc.contributor.author Osten, Wolfgang
dc.date.accessioned 2010-12-07T03:11:07Z
dc.date.available 2010-12-07T03:11:07Z
dc.date.copyright 2009
dc.date.issued 2010-12-07T03:11:07Z
dc.identifier.citation Fu, Y., Pedrini, G., Hennelly, B. M., Groves, R. M., & Osten, W. (2009). Dual-wavelength image-plane digital holography for dynamic measurement. Optics and Lasers in Engineering, 47(5), 552-575.
dc.identifier.uri http://hdl.handle.net/10220/6484
dc.description.abstract A dual-wavelength image-plane digital holography, combined with a windowed Fourier analysis, is presented for dynamic measurement of a vibrating object. In order to expand the range of the velocity measurement, the object is simultaneously illuminated by two lasers with different wavelengths. A sequence of digital holograms of a vibrating object is captured by a CCD camera and two wrapped phase maps are retrieved from each digital hologram. At each instant, a new phase distribution with a synthetic wavelength is obtained by subtracting these two wrapped phase maps. A windowed Fourier analysis is then applied spatially and temporally to retrieve the high-precision displacement and velocity of the tested object. Experimental results show the requirement on the camera capture frequency is reduced by the proposed method.
dc.format.extent 24 p.
dc.language.iso en
dc.relation.ispartofseries Optics and Lasers in Engineering
dc.rights This is the author created version of a work that has been peer reviewed and accepted for publication by Optics and Lasers in Engineering, 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.optlaseng.2008.10.002]
dc.subject DRNTU::Science::Physics::Optics and light.
dc.title Dual-wavelength image-plane digital holography for dynamic measurement
dc.type Journal Article
dc.contributor.research Temasek Laboratories
dc.identifier.doi http://dx.doi.org/10.1016/j.optlaseng.2008.10.002
dc.description.version Accepted version

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