OPTICAL FILM AND PRODUCTION METHOD THEREOF

摘要

An optical film capable of bringing about remarkably high visual effect, decorative effect and the like that cannot be produced, or is difficult to produce, by conventional lens films or prism films, as well as excellent light control effect. The optical film comprises a plurality of fine prismatic protruding ribs comprising a two-component reaction-curable non-yellowing transparent polyurethane resin and arranged in a predetermined pattern on one surface of the optical film. The prismatic protruding ribs are derived from a plurality of fine grooved ribs arranged on the surface of a pattern transfer backing film abutted against a starting material on the way of shaping the optical film, which are corresponding to the protruding ribs and have a cross-section in the inverted prism shape.