Simple shearing interferometer suitable for vibration measurements

Emilia Mitkova Mihaylova; Maurice Patrick Whelan; Vincent Toal

doi:10.1117/12.579541

22 June 2004 Simple shearing interferometer suitable for vibration measurements

Emilia Mitkova Mihaylova, Maurice Patrick Whelan, Vincent Toal

Proceedings Volume 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2004) https://doi.org/10.1117/12.579541
Event: Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2004, Ancona, Italy

Abstract

Recently there has been an increasing interest in the application of shearography for modal analysis of vibrating objects. New interferometric systems, which are simple and flexible are of interest for engineering and industrial applications. An electronic speckle pattern shearing interferometer (ESPSI) with a very simple shearing device is used for study of vibrations. The shearing device consists of two partially reflective glass plates. The reflection coefficients of the coatings are 0.3 and 0.7 respectively. The distance between the two glass plates controls the size of the shear. The versatility of this simple shearing interferometer is shown. It is demonstrated that the ESPSI system can be used for vibration measurements and phase-shifting implemented for fringe analysis. The results obtained are promising for future applications of the system for modal analysis.

Citation Download Citation

Emilia Mitkova Mihaylova, Maurice Patrick Whelan, and Vincent Toal "Simple shearing interferometer suitable for vibration measurements", Proc. SPIE 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 June 2004); https://doi.org/10.1117/12.579541

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