Structure effect and orientation distribution of azo dyes on optical anisotropy of dyed PVA-films - L. N. Filippovich; N. G. Ariko; H. A. Almodarresiyeh; S. N. Shahab; P. M. Malashko; V. E. Agabekov (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2013)