Computational reduction of the image sets required in conventional phase shifting methods applied to digital photoelasticity

Juan C. Briñez de León; Alejandro Restrepo M.; John W. Branch

doi:10.1117/12.2273431

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24 August 2017 Computational reduction of the image sets required in conventional phase shifting methods applied to digital photoelasticity

Juan C. Briñez de León, Alejandro Restrepo M., John W. Branch

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Proceedings Volume 10395, Optics and Photonics for Information Processing XI; 103950K (2017) https://doi.org/10.1117/12.2273431
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Phase shifting techniques are often limited in digital photoelasticity by the quantity of acquisitions they require, and the process to perform them. This work simplifies such process by developing only a part of the acquisitions, and the rest are generated computationally. Our proposal was validated for a six-acquisition method by generating synthetic images from the analytical model of a disk under diametric compression. The results show that although our method uses less acquisitions, it is capable to recover the stress field with similar performance than conventional methods. This proposal could be useful for evaluating dynamic cases because the reduction of the exposure time expended during the acquisition stage.

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Juan C. Briñez de León, Alejandro Restrepo M., and John W. Branch "Computational reduction of the image sets required in conventional phase shifting methods applied to digital photoelasticity", Proc. SPIE 10395, Optics and Photonics for Information Processing XI, 103950K (24 August 2017); https://doi.org/10.1117/12.2273431

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