SPIE Proceedings [SPIE Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications - Ancona, Italy (Wednesday 18 June 2008)] Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications - Full-field localization of plate-thickness inhomogeneities through the local changes in the wavenumber of Lamb waves measured with pulsed TV holography