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Autori: F. Garoi, D. Apostol, A. Sima, V. Damian, P. C. Logofatu, V. Nascov, Iuliana Iordache and Mihaela Bojan
Editorial: Proc. SPIE of Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II, Vol. 6635, p.U209-U215, 2007.
We discuss an experiment for detecting small deformations by speckle interferometry. Vibration modes of an aluminium plate are observed by digital speckle pattern interferometry (DSPI). A Mach-Zender interferometer arrangement is used and the speckle interferograms are recorded with a CCD camera and processed on a computer. These fringes depend on the path differences due to the vibration of the aluminium plate from its original state. Vibration amplitudes between 0.3 – 0.6 m were measured for seven vibration modes.
Cuvinte cheie: interferenta in lumina granulara, vibratii, testare nedistructiva // speckle, interference, speckle interferometry, vibrations, non-destructive testing