A full-field-view laser stroboscopic system that visualizes surface mode shapes in piezoelectric resonators has been developed. The system presented is based on stroboscopic laser irradiation, laser speckle, and two-dimensional correlation image processing. We employed a high-speed laser diode synchronized to the resonator motion to develop an in-plane vibrational distribution visualizer that is capable of operation above 10 MHz. The detection sensitivity of the proposed system is ten times better than that of previous laser speckle systems.
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