Imaging velocities of a vibrating object by stroboscopic sideband holography

We propose here to combine sideband holography with stroboscopic illumination synchronized with the vibration of an object. By sweeping the optical frequency of the reference beam such a way the holographic detection is tuned on the successive sideband harmonic ranks, we are able to image the instan...

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Bibliographic Details
Published in:arXiv.org 2012-10
Main Authors: Verpillat, Frédéric, Joud, Fadwa, Atlan, Michael, Gross, Michel
Format: Article
Language:English
Subjects:
Holography
Illumination
Optical frequency
Online Access:Get full text
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Summary:We propose here to combine sideband holography with stroboscopic illumination synchronized with the vibration of an object. By sweeping the optical frequency of the reference beam such a way the holographic detection is tuned on the successive sideband harmonic ranks, we are able to image the instantaneous velocities of the object. Since the stroboscopic illumination is made with an electronic device, the method is compatible with fast (up to several MHz) vibration motions. The method is demonstrated with a vibrating clarinet reed excited sinusoidally at 2 kHz, and a stroboscopic illumination with cyclic ratio 0.15. Harmonic rank up to n = \(\pm\)100 are detected, and a movie of the instantaneous velocities is reported.
ISSN:2331-8422
DOI:10.48550/arxiv.1210.3182