An optical moire technique for real-time metrological measurements is proposed. Temporal behavior of periodic as well as nonperiodic vibrations can be accurately determined. We demonstrate the method by measuring the mechanical vibration of a driven speaker membrane.
© 1985 Optical Society of America
O. Kafri, Y. B. Band, T. Chin, D. F. Heller, and J. C. Walling, "Real-time moire vibration analysis of diffusive objects," Appl. Opt. 24, 240-242 (1985)