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Asian Journal of Physics Vol 31, No 7 (2022) 677-686

Measurement of the displacement field of non-planar surfaces using ESPI

Juan Antonio Rayas1, Amalia Martínez-García1, Ana Karen Reyes1, and Miguel León-Rodríguez2
1Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, C.P. 37150, León, Guanajuato, México
2Universidad Politécnica de Guanajuato, Av. Universidad Sur 1001, Cortazar-Guanajuato, 38496, México

Dedicated to Prof Maria J Yzuel

Measurements of the displacement field by optical interferometry depend on the induced phase difference and on the interferometer’s sensitivity vector. In the case of out-of-plane interferometer, the latter depends in turn on the positions of the illuminating source and the observation, as well as the topography of the analyzed sample. The aim of this study is the quantification of the out-of-plane displacement field of a car fender subjected to mechanical loading. Special attention was paid to evaluating contributions to the displacement when the fender shape is considered. The displacement field is evaluated by using an electronic speckle pattern interferometer and the topography is obtained by a fringe projection technique. © Anita Publications. All rights reserved.
Keywords: Sensitivity vector, ESPI, Fringe projection, Phase stepping.

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