Use of digital wave front reconstruction for vibration analysis

Pascal Picart; Julien Leval; Jean-Pierre Boileau; Jean-Claude Pascal; Jean-Pierre Dalmont

doi:10.1117/12.695350

15 September 2006 Use of digital wave front reconstruction for vibration analysis

Pascal Picart, Julien Leval, Jean-Pierre Boileau, Jean-Claude Pascal, Jean-Pierre Dalmont

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 634113 (2006) https://doi.org/10.1117/12.695350
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

This paper aims to present the different opportunities using digital wave front reconstruction in vibration analysis. The paper deals with off axis digital holography for which the wave front reconstruction is performed by fast Fourier transform methods. According to this way for the object plane reconstruction, we discuss about image formation by considering the exposure time of the detector. For the case of a long exposure time compared to the vibration period, that is the time-averaging regime, applications are presented, examples of which include vibrations of a clarinet reed and detection of defaults in a dome mode. For the case of a short exposure time compared to the vibration period, algorithm for the full field bidimensional amplitude and phase retrieving is presented. Applications of the method are presented, example of which include modal characterization of loudspeakers and bidimensional vibrometry of elastomer components.

Citation Download Citation

Pascal Picart, Julien Leval, Jean-Pierre Boileau, Jean-Claude Pascal, and Jean-Pierre Dalmont "Use of digital wave front reconstruction for vibration analysis", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 634113 (15 September 2006); https://doi.org/10.1117/12.695350

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