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Optimal re-referencing rate for in-plane dynamic speckle interferometry
Loughborough University.
Centro de Investigaciones en Optica, Loma del Bosque.
2003 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 42, no 2, p. 251-258Article in journal (Refereed) Published
Abstract [en]

We investigate experimentally the optimal rate at which the reference speckle pattern should be updated when dynamic speckle interferometry is used to measure transient in-plane displacement fields. Images are captured with a high-speed camera and phase shifting and phase unwrapping are done temporally. For a wide range of in-plane velocities, up to a maximum of 40% of the Nyquist limit, the random errors in the calculated displacement field are minimized by updating the reference speckle pattern after a speckle displacement of 1 /10 of the pixel spacing. The technique is applied to measurements of microscale deformation fields within an adhesive joint in a carbon-fiber epoxy composite.

Place, publisher, year, edition, pages
2003. Vol. 42, no 2, p. 251-258
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-10472DOI: 10.1364/AO.42.000251ISI: 000180232000009Scopus ID: 2-s2.0-0037428363Local ID: 94a3fa00-6f76-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-10472DiVA, id: diva2:983417
Note
Validerad; 2003; 20060926 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Svanbro, Angelica

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