TV SCREEN Russian patent published in 1995 - IPC

FIELD: optical-mechanical industry. SUBSTANCE: screen has Fresnel plate 4 turned to objective 2 by its convex cylindrical lenses 6 with pitch P at vertical direction; output surface of the plate is made in form of annular Fresnel lens which has pitch being equal to P and raster plate joining Fresnel plate 4 and turned with its other convex cylindrical lenses to Fresnel plate 4. Lenses has P pitch at horizontal direction. Output surface of raster plate is formed by a row of non-transparent strips with pitch P at horizontal direction and biconcave cylindrical lenses disposed among the strips. Central areas of biconcave cylindrical lenses are made in form of convex aspherical surface and two edge areas made in form of spherical surface. EFFECT: improved efficiency; improved quality. 5 dwg