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Proceedings Paper

Fiber optic projection interferometer for vibration analysis
Author(s): Giuseppe Schirripa Spagnolo; Domenica Paoletti; Raffaele Grella; Dario Ambrosini
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Paper Abstract

A new non contacting, full field, variable sensitivity optical method is proposed for an experimental analysis of the local amplitude vibration of a diffuse surface. It is based on sinusoidal fringe projection interferometer just developed for contour map. Linear sinusoidal fringes, which are formed by the interference of two wave fronts emitted from the output of a fiber coupler, are projected on the object surface. The visibility of these fringes is modulated by a function of local amplitude of vibration; thus loci of constant vibrational amplitude can be directly observed as regions of high or low fringe visibility in the image of the surface. A brief analysis of the technique and some preliminary experimental tests are presented.

Paper Details

Date Published: 23 August 1996
PDF: 6 pages
Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); doi: 10.1117/12.248676
Show Author Affiliations
Giuseppe Schirripa Spagnolo, Univ. degli Studi di L'Aquila (Italy)
Domenica Paoletti, Univ. degli Studi di L'Aquila (Italy)
Raffaele Grella, Univ. degli Studi di L'Aquila (Italy)
Dario Ambrosini, Univ. degli Studi di L'Aquila (Italy)


Published in SPIE Proceedings Vol. 2868:
Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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