@inproceedings{d8eb3ba03e8a4a8ea5734a27e28d93ab,
title = "Whole field out-of-plane vibration analysis with a HOE-based ESPI system",
abstract = "Electronic speckle pattern interferometry (ESPI) is a full-field measurement technique, capable of displaying vibrational mode shapes. A simple optical set-up for an ESPI system using a holographic optical element (HOE) is presented. The HOE is designed to create a speckled reference beam in the interferometer. A partially reflective glass plate provides illumination of the object along the normal to its surface, ensuring that the system is sensitive only to out-of-plane displacement of the object. It is demonstrated that the HOE-based system can be used for vibration measurements. Phase shifting can be implemented for fringe analysis. A big advantage of the system is its simplicity. It requires a small number of components: a coherent light source, a holographic optical element, a glass plate and a CCD camera. Introducing holographic optical elements in ESPI gives the advantage of large aperture optical elements at relatively low cost.",
keywords = "ESPI, HOE, Holographic optical elements, Interferometry, Mode analysis, Vibrations",
author = "Emilia Mihaylova and Viswanath Bavigadda and Raghavendra Jallapuram and Vincent Toal",
year = "2008",
doi = "10.1117/12.803004",
language = "English",
isbn = "9780819473264",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Eighth International Conference on Vibration Measurements by Laser Techniques",
note = "8th International Conference on Vibration Measurements by Laser Techniques: Advances and Applications ; Conference date: 18-06-2008 Through 20-06-2008",
}