Detection of hidden stationary deformations of vibrating surfaces by use of time-averaged digital holographic interferometry.
A method of detecting displacements of a surface from its steady-state position to its equilibrium position while it is vibrating has been developed by use of time-average digital holographic interferometry. This method permits extraction of such a hidden deformation by creating two separated systems of interferogram fringes: one corresponding to a time-varying resonantly oscillating optical phase, the other to the stationary phase modification. A mathematical description of the method and illustrative results of experimental verification are presented.
Demoli
Nazif
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Institute of Physics, Bijenicka c. 46, P.O. Box 304, Zagreb, Croatia. demoli@ifs.hr
Vukicevic
Dalibor
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