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Determination of surface contour by temporal analysis of shadow moiré fringes

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Determination of surface contour by temporal analysis of shadow moiré fringes

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dc.contributor.author Quan, Chenggen
dc.contributor.author Fu, Yu
dc.contributor.author Tay, Cho Jui
dc.date.accessioned 2011-01-26T04:15:02Z
dc.date.available 2011-01-26T04:15:02Z
dc.date.copyright 2004
dc.date.issued 2011-01-26T04:15:02Z
dc.identifier.citation Quan, C., Fu, Y., & Tay, C. J. (2004). Determination of surface contour by temporal analysis of shadow moiré fringes. Optics Communications, 230(1-3), 23-33.
dc.identifier.issn 0030-4018
dc.identifier.uri http://hdl.handle.net/10220/6706
dc.description.abstract A simple temporal analysis algorithm (phase scanning method) is proposed for 3-D surface profile measurement of a vibrating object based on shadow moiré technique. A grating is positioned close to a low-frequency vibrating object and its shadow is observed through the grating. The moiré fringe patterns, generated by the interference of grating lines and shadow lines, are captured by a high-speed CCD camera with a telecentric gauging lens. Phase values are evaluated point by point using phase scanning method. From the phase values of each point on the object, the high-quality surface profile of the specimen at different instants of vibration can be retrieved. In this application, two specimens are tested to demonstrate the validity of the method, one is a spherical cap with height of 4 mm, the other is a small coin with unevenness of less than 0.2 mm. The experimental results are compared with test results using mechanical stylus method.
dc.format.extent 27 p.
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.2003.11.035].
dc.subject DRNTU::Science::Physics::Optics and light.
dc.title Determination of surface contour by temporal analysis of shadow moiré fringes
dc.type Journal Article
dc.contributor.research Temasek Laboratories
dc.identifier.doi http://dx.doi.org/10.1016/j.optcom.2003.11.035
dc.description.version Accepted version

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