Measurement of transient out-of-plane displacement gradients in plates using double-pulsed subtraction TV shearography | Zendy

Alejandro Doval | Zendy

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Measurement of transient out-of-plane displacement gradients in plates using double-pulsed subtraction TV shearography

Author(s) -

Alejandro Doval

Publication year - 2000

Publication title -

optical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.357

H-Index - 105

eISSN - 1560-2303

pISSN - 0091-3286

DOI - 10.1117/1.1305260

Subject(s) - shearography , optics , transient (computer programming) , image subtraction , displacement (psychology) , subtraction , plane (geometry) , materials science , computer science , image processing , interferometry , physics , computer vision , image (mathematics) , geometry , psychology , mathematics , psychotherapist , operating system , binary image , arithmetic

We report a technique for the measurement of transient out- of-plane displacement gradients in plane objects by double-pulsed sub- traction TV shearography. The fringe patterns are automatically and quantitatively analyzed by the Fourier transform method. A novel optical setup based on the separation and further recombination of illumination beams is demonstrated for the generation of carrier fringes. The principle of the proposed technique is theoretically described, and its immunity to environmental disturbances is discussed. Experimental results obtained with a metallic plate excited by the impact of a piezoelectric transducer are presented. © 2000 Society of Photo-Optical Instrumentation Engineers. (S0091-3286(00)02908-1)

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