ADDITIVE OPTICAL PROPERTIES OF UNIAXIAL LIQUID-CRYSTALLINE MIXTURE
The additivity relations, which connect the optical parameters of an uniaxial liquid-crystalline mixture in the transparency region [refractive indices n(j) for the light polarized along (j = parallel to) or across (j = perpendicular to) optical axis, Delta n = n(parallel to) - n(perpendicular to), < n > = (n(parallel to) + 2n(perpendicular to))/3, epsilon(m) =(n(parallel to)(2) + 2n(perpendicular to)(2))/3, n(m) = epsilon(1/2)(m)] with similar values of pristine liquid-crystalline components constituting the mixture, were obtained. To derive the additivity relations, for the mixture and its individual components, a microscopic approach was used, taking into account the anisotropy of the local field of light wave. All additivity relations for the nematic mixture of para-azoxyanisole with para-azoxyphenetole obtained in a broad range of mesophase temperatures and light-wave wavelengths were confirmed with high accuracy.