Characterization of the photoelastic dispersion coefficient using polarized digital holography

Author:

Leal da Silva Sidney1,Prado Felipe Maia2ORCID,Toffoli Daniel José1,Wetter Niklaus Ursus2ORCID

Affiliation:

1. Fatec Itaquera

2. IPEN-CNEN/SP

Abstract

The photoelastic dispersion coefficient represents the relationship between stress and the differences in refractive indices in a birefringent material. However, determining the coefficient using photoelasticity is challenging, as it is difficult to determine the refractive indices within photoelastic samples that are under tension. Here we present, for the first time, to our knowledge, the use of polarized digital holography to investigate the wavelength dependence of the dispersion coefficient in a photoelastic material. A digital method is proposed to analyze and correlate the differences in mean external stress with differences in mean phase. The results confirm the wavelength dependence of the dispersion coefficient, with an accuracy improvement of 25% compared to other photoelasticity methods.

Funder

Fundação de Amparo à Pesquisa do Estado de São Paulo

Publisher

Optica Publishing Group

Subject

Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Photoelastic Dispersion Coefficient by Holographic Reconstruction with Neural Networks and the Fresnel Method;2023 International Conference on Optical MEMS and Nanophotonics (OMN) and SBFoton International Optics and Photonics Conference (SBFoton IOPC);2023-07-30

2. Photoelastic Dispersion Coefficient Analysis of Epoxy Regin Samples With and Without Dental Implants;Frontiers in Optics + Laser Science 2023 (FiO, LS);2023

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