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Proceedings Paper

Amplitude modulation fiber optic vibrometer with large bandwidth and nanometric accuracy
Author(s): R. Dib; Yasser Alayli; P. Wagstaff; J. C. Henrio
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Paper Abstract

The use of non contact vibration measurements with laser based optical devices is a relatively recent and fairly expensive technique and the more extensive use of this type of measurement is often limited by the high cost of these instruments. Laser vibrometer measurements are therefore generally restricted to single or two point simultaneous measurements or a series of reference single point measurements as the beam is displaced from one point to another. Many optical methods based on interferometry are also difficult to use in industrial environments. To help to resolve some of these problems a simple optical device based on the use of fiber-optics and luminous intensity modulation is presented. The accuracy of the optical vibrometer is not influenced by the industrial environment. The behavior of the fiber optic vibrometer is compared with the response of an accelerometer. This comparison shows that the fiber optic probe has a linear response over a large bandwidth.

Paper Details

Date Published: 22 May 2000
PDF: 6 pages
Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); doi: 10.1117/12.386732
Show Author Affiliations
R. Dib, Univ. de Technologie de Compiegne (France)
Yasser Alayli, Univ. de Technologie de Compiegne and Univ. de Versailles Saint-Quentin (France)
P. Wagstaff, Univ. de Technologie de Compiegne (France)
J. C. Henrio, Univ. de Technologie de Compiegne (France)


Published in SPIE Proceedings Vol. 4072:
Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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