Advances in real-time holographic interferometry for the measurement of vibrations and deformations

Jaime Frejlich; Paulo Magno Garcia; Agnaldo A. Freschi

doi:10.1117/12.307694

1 June 1998 Advances in real-time holographic interferometry for the measurement of vibrations and deformations

Jaime Frejlich, Paulo Magno Garcia, Agnaldo A. Freschi

Proceedings Volume 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1998) https://doi.org/10.1117/12.307694
Event: Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1998, Ancona, Italy

Abstract

We describe the latest improvements in holographic interferometry that enable the real-time measurement of vibrational modes and static deformations in surfaces using low power laser illumination and a photorefractive Bi₁₂TiO₂₀ crystal as the recording medium. An efficient setup has been developed where the most critical elements have been optimized: target illumination and backscattered light collection, distribution of light between the object and reference beams, and stabilized system operation. Experimental results for vibration and deformation measurements are reported.

Citation Download Citation

Jaime Frejlich, Paulo Magno Garcia, and Agnaldo A. Freschi "Advances in real-time holographic interferometry for the measurement of vibrations and deformations", Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); https://doi.org/10.1117/12.307694

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