Characterization of the photoelastic dispersion coefficient using polarized digital holography
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.
Citação
@online{da_silva,_sidney2023,
author = {Da Silva, Sidney, Leal and Felipe Maia , Prado and Daniel
José , Toffoli and Niklaus Ursus , Wetter},
title = {Characterization of the photoelastic dispersion coefficient
using polarized digital holography},
volume = {40},
number = {4},
date = {2023-04-01},
doi = {10.1364/JOSAA.482543},
langid = {pt-BR},
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.}
}