OPTICALLY ANISOTROPIC FILM AND PROCESS OF ITS PRODUCTION Russian patent published in 2004 - IPC

FIELD: film production. SUBSTANCE: anisotropic film can be utilized in manufacture of various devices including information displays on liquid crystals, lighting equipment, decorative articles, trade marks, etc. Optically anisotropic film is made of molecularly oriented organic matter in which capacity at least one pigment which structural formula includes at least one ionogenic and/or nonionogenic group ensuring its solubility to form lyotropic liquid phase is utilized. Direction of optical axis of film varies by thickness. Process of film production provides for formation of film by application of lyotropic liquid crystal with removal of solvent. In process or after formation of layer of liquid crystal external orientation influence is provided, its direction or direction of surface orientation of substrate or layer lies at angle from interval between 0-90 deg. EFFECT: combination of properties of polarizing and phase-shifting films with simplification of production process, provision for reproducibility of optical parameters over entire surface and volume of film, achievement of high degree of anisotropy. 18 cl, 2 dwg