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Issue Eur. Phys. J. Appl. Phys.
Volume 47, Number 1, July 2009
4th Colloquium Interdisciplinary in Instrumentation (C2I)
Article Number 12706
Number of page(s) 8
Section 4th Colloquium Interdisciplinary in Instrumentation (C2I 2007)
DOI 10.1051/epjap/2008201
Published online 17 February 2009

Eur. Phys. J. Appl. Phys. 47, 12706 (2009)
DOI: 10.1051/epjap/2008201

Analysis of clarinet reed oscillations with digital Fresnel holography

P. Picart1, 2, J. Leval1, F. Piquet2, J.-P. Boileau2 and J.-P. Dalmont1

1  LAUM, CNRS, Université du Maine, Av. O. Messiaen, 72085 Le Mans Cedex 09, France
2  ENSIM-École Nationale Supérieure d'Ingénieurs du Mans, Rue Aristote, 72085 Le Mans Cedex 09, France

pascal.picart@univ-lemans.fr

Received: 31 May 2008 / Received in final form: 23 October 2008 / Accepted: 4 November 2008 / Published online: 17 February 2009

Abstract
This paper describes optical instrumentation devoted to vibration analysis. Two strategies based on digital Fresnel holography are presented. The first, called time-averaging consists in the numerical reconstruction of the hologram after recording with an exposure time much greater than the vibration period. Thus, the holograms are amplitude modulated by a Bessel function. The last strategy, using a pulsed regime, allows the reconstruction of the full movement of the vibration, even if it exhibits very high amplitude. Experimental results presented in this paper concern the study of the vibrations of a clarinet reed under free and forced oscillation regimes.

PACS
07.60.Ly - Interferometers.
42.40.-i - Holography.
42.40.Kw - Holographic interferometry; other holographic techniques.

© EDP Sciences 2009


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