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Fringe free holographic measurements of large amplitude vibrations

Abstract : In the measurement of the amplitude of vibration of objects, holographic imaging techniques usually involve fringe counting; due to the limited resolution of images, measurements of large amplitudes are not accessible. We demonstrate a technique that suppresses the necessity of fringe counting: frequency sideband imaging, where the order of the sideband is considered as a marker of the amplitude. The measurement is completely local: no comparison with another reference point on the object is necessary. It involves a sharp variation of a signal, which makes it robust against perturbations. The method is demonstrated in an experiment made with a vibrating clarinet reed; phase modulations as large as $1000$ radians have been measured.
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https://hal.archives-ouvertes.fr/hal-00468198
Contributor : Michel Gross <>
Submitted on : Tuesday, March 30, 2010 - 12:14:00 PM
Last modification on : Saturday, April 24, 2021 - 6:52:03 PM
Long-term archiving on: : Wednesday, September 8, 2010 - 8:42:18 PM

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  • HAL Id : hal-00468198, version 1
  • ARXIV : 1003.5999

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Fadwa Joud, Frédéric Verpillat, Franck Laloë, Atlan Michael, Jean Hare, et al.. Fringe free holographic measurements of large amplitude vibrations. Optics Letters, Optical Society of America - OSA Publishing, 2009, 34 (23), pp.3698. ⟨hal-00468198⟩

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