Eur. Phys. J. Appl. Phys.
Volume 47, Number 1, July 2009
4th Colloquium Interdisciplinary in Instrumentation (C2I 2007)
|Number of page(s)||8|
|Published online||17 February 2009|
Analysis of clarinet reed oscillations with digital Fresnel holography
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
Corresponding author: email@example.com
Revised: 23 October 2008
Accepted: 4 November 2008
Published online: 17 February 2009
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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