Characterization of the photoelastic dispersion coefficient using polarized digital holography

Autor:	Sidney Leal da Silva, Felipe Maia Prado, Daniel José Toffoli, Niklaus Ursus Wetter
Rok vydání:	2023
Předmět:	Computer Vision and Pattern Recognition Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials
Zdroj:	Journal of the Optical Society of America A. 40:C108
ISSN:	1520-8532 1084-7529
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4be5bce54f246bb5537f88fa0647ba8a https://doi.org/10.1364/josaa.482543 Zobrazit plný text záznamu