Laser ultrasonics
Snapshots of laser-excited elastic surface wave displacements (velocity respectively 6000 m/s and 3000 m/s for lateral bulk longitudinal and Rayleigh surface waves above a hidden defect on nano-second time scale (total duration of movie: 4 microseconds).
Snapshots of piezo-electrically excited elastic Lamb waves in a quartz crystal on microsecond timescale.
Snapshots of normal displacements of a piezo-electric quartz disc, partically covered with electrodes and excited by a voltage pulse. Total movie duration is 8 microseconed with 80 ns between subsequent images. The piezo-electric disc as a thickness of 0.3 mm and 15 mm diameter.
