Fiber optic projection interferometer for vibration analysis

Giuseppe Schirripa Spagnolo; Domenica Paoletti; Raffaele Grella; Dario Ambrosini

doi:10.1117/12.248676

23 August 1996 Fiber optic projection interferometer for vibration analysis

Giuseppe Schirripa Spagnolo, Domenica Paoletti, Raffaele Grella, Dario Ambrosini

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248676
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

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.

Citation Download Citation

Giuseppe Schirripa Spagnolo, Domenica Paoletti, Raffaele Grella, and Dario Ambrosini "Fiber optic projection interferometer for vibration analysis", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248676

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KEYWORDS

Interferometers

Visibility

Fiber optics

Fringe analysis

Vibrometry

Bessel functions

Modulation

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