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Phase-stepped television holographic technique for measuring phase and amplitude maps of small vibrations
Luleå tekniska universitet.
1996 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 35, no 20, p. 3791-3798Article in journal (Refereed) Published
Abstract [en]

Phase stepping between frames in TV holography is combined with sinusoidal phase modulation to determine phase and amplitude distributions of objects vibrating with small amplitudes 1,l@20, where l is the wavelength of the laser light used2. This technique has applications in, for example, optical modal analysis and the determination of harmonic sound fields in air and water. The noise reductionthat is obtained with the phase-stepping technique reduces the number of interferograms needed by one-half, which can shorten experimental time. The technique is robust, easy to use, and illustrated bymodes of vibration in a simple plate and in a more complicated structure 1a violin2.

Place, publisher, year, edition, pages
1996. Vol. 35, no 20, p. 3791-3798
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-2928DOI: 10.1364/AO.35.003791ISI: A1996UY81900002Scopus ID: 2-s2.0-0006114278Local ID: 0a9da1a0-02ae-11dc-ad0a-000ea68e967bOAI: oai:DiVA.org:ltu-2928DiVA, id: diva2:975782
Note
Godkänd; 1996; 20070515 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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