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 = || ) or across (j =  ) optical axis,  n = n || – n  ,  n  = (n || + 2n  )/3,  m =(n || 2 + 2n  2 )/3, n m =  m1/2 ] with similar values of pristine liquid-crystalline com-ponents constituting the mixture, were obtained. To derive the additivity relations, for the mixture and its individ-ual 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.