New computational hybrid three-wavelength-based approach of phase shifting for analyzing the stress field in photoelasticity studies

Alejandro Restrepo-Martínez; Hermes A. Fandiño Toro; Juan Carlos Briñez de León

doi:10.1117/12.2594296

1 August 2021 New computational hybrid three-wavelength-based approach of phase shifting for analyzing the stress field in photoelasticity studies

Alejandro Restrepo-Martínez, Hermes A. Fandiño Toro, Juan Carlos Briñez de León

Author Affiliations +

Proceedings Volume 11841, Optics and Photonics for Information Processing XV; 118410N (2021) https://doi.org/10.1117/12.2594296
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Digital photoelasticity is used for evaluating the stress in loaded bodies. However, when dynamic analyses are needed, the motions of optical elements are an experimental challenge. This new computational hybrid approach calculates the stress field by extract the phase steps from RGB color channels of a photoelastic color image. Our approach integrated the load stepping strategy with a computational hybrid phase algorithm, hence only bright field images are required. Although, our method has a lower performance than phase shifting methods evaluated, the principal advantage of this hybrid strategy is that only a color- image is required to analyze stress field, avoided capture multiple images for analyzing phase maps.

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Alejandro Restrepo-Martínez, Hermes A. Fandiño Toro, and Juan Carlos Briñez de León "New computational hybrid three-wavelength-based approach of phase shifting for analyzing the stress field in photoelasticity studies", Proc. SPIE 11841, Optics and Photonics for Information Processing XV, 118410N (1 August 2021); https://doi.org/10.1117/12.2594296

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