Measuring Amplitude and Phase of Vibration With Double-Exposure Stroboscopic TV Holography

Abstract

We present a technique for the measurement of both amplitude and phase of sinusoidal vibrations with double-exposure stroboscopic TV holography combining optical and mechanical phase shifting. Using double-exposure stroboscopic illumination, there is no need of recording a reference state of the object and, consequently, the measurements can be made “in flight”, with a sensitivity to environmental noise much lower and with a more efficient use of the available laser power than with the former single-exposure techniques developed for the same purpose.KeywordsFringe PatternElectronic Speckle Pattern InterferometryMechanical PhaseSinusoidal VibrationIllumination PulseThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.