SCREEN Russian patent published in 1998 - IPC

FIELD: image shaping devices, devices for shaping directivity pattern of light beams after their passing or reflection from screen. SUBSTANCE: screen has medium 1 confined between first surface 3 where to light is directed, and second surface; placed in medium are light- refracting members made in the form of fibers 2 distinguished from medium 1 by refraction index; they are at least partially immersed in medium 1. The latter and fibers 2 are at least partially transparent; fibers 2 are arranged so that any light beam passes through at least one fiber. Screen has two or more layers; fibers 2 at least in one layer are arranged perpendicular to each other. Fibers 2 are placed to form spiral or concentric circles. Layers are built up of alternating fibers 2 of different diameters. EFFECT: enlarged functional capabilities. 14 cl, 10 dwg