A. Bayon et Pnj. Rasolofosaon, 3-COMPONENT RECORDING OF ULTRASONIC TRANSIENT VIBRATION BY OPTICAL HETERODYNE INTERFEROMETRY, The Journal of the Acoustical Society of America, 99(2), 1996, pp. 954-961
The generation and detection of elastic waves by photoelastic methods,
called ''laser ultrasonics,'' is now a rather commonly used method in
research. The aim of this paper is to adapt an existing method, based
on laser speckle interferometry, in order to record the three compone
nts of transient vibration induced by an ultrasonic wave at a point on
the surface of a solid model. A detailed description of the method is
given. The reliability of the method is experimentally demonstrated.
As an illustration, maps of the local three-dimensional transient vibr
ation and of the particle trajectories of different points at the surf
ace of a solid are reported. (C) 1996 Acoustical Society of America.