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Simultaneous three-dimensional dynamic deformation measurements with pulsed digital holography
Luleå tekniska universitet.
Institut für Technische Optik, Universität Stuttgart.
Institut für Technische Optik, Universität Stuttgart.
Centro de Investigaciones en Optica, Loma del Bosque.
1999 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 38, no 34, p. 7056-7062Article in journal (Refereed) Published
Abstract [en]

The three deformation components x , y , z of a vibrating object are measured simultaneously by use of digital holography with a double-pulse ruby laser source. The object is illuminated from three different directions, each optically path matched with three reference beams such that three independent digital holograms are formed and added incoherently in one single CCD image. The optical phase difference between the two recordings taken for each hologram is quantitatively evaluated by the Fourier-transform method so that a set of three phase maps is obtained, representing the deformation along three sensitivity vectors. The total object deformation is obtained as a vector resultant from the data of the three phase maps. To give the full three-dimensional (3-D) description, the shape of the object is measured by the two-wavelength contouring method. Experiments are performed with a cylinder as the test object, transiently and harmonically excited. The 3-D deformation and shape measurement results are presented graphically.

Place, publisher, year, edition, pages
1999. Vol. 38, no 34, p. 7056-7062
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-6218DOI: 10.1364/AO.38.007056Scopus ID: 2-s2.0-0011315690Local ID: 469b1b30-ff23-11db-b19d-000ea68e967bOAI: oai:DiVA.org:ltu-6218DiVA, id: diva2:979095
Note
Godkänd; 1999; 20070510 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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