Abstract
Using a new version of the Talbot-Rayleigh method we recorded the I (λ) channeled spectra of uniaxial nematic liquid crystal at different temperatures. We derive the theoretical expression of I (λ) that involves a three-band model for the refractive indices, which is then fitted with the experimental data by a nonlinear optimization procedure. As a result, we compute the dispersion curves no, ne, Δn, their temperature dependencies, and the band contributions.
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