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Proceedings Paper

Separation of vibration fringe data from rotating object fringes in pulsed ESPI
Author(s): Carlos Perez-Lopez; Fernando Mendoza Santoyo; Ramon Rodriguez-Vera
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Paper Abstract

An unbalanced object that rotates may present a characteristic vibration amplitude at an specific frequency. Pulsed electronic speckle pattern interferometry is a non- destructive electro-optical technique well suited to study this rotating-vibrating object. Fringe data is initially qualitatively analyzed while being observed in real time on a TV monitor, and later quantitative data can be extracted using one of several methods reported in the literature. However, if an object derotator is not available the resulting fringes are composed of a mixture of rotation and vibration fringes, making of a qualitative and quantitative analysis an almost impossible task. The present paper proposes a method to separate the fringes due to rotation from those produced solely by vibration. The method is based on a high precision scheme that synchronizes and fixes an object point during rotation, and assumes a resonant mode of object vibration.

Paper Details

Date Published: 22 May 2000
PDF: 5 pages
Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); doi: 10.1117/12.386755
Show Author Affiliations
Carlos Perez-Lopez, Ctr. de Investigaciones en Optica, AC (Mexico)
Fernando Mendoza Santoyo, Ctr. de Investigaciones en Optica, AC (Mexico)
Ramon Rodriguez-Vera, Ctr. de Investigaciones en Optica, AC (Mexico)


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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