Patent ID: 9261641
Filing Date: 2016-02-16
CPC Classification: G02B

Claim Text:
1. An optical film having opposed first and second structured surfaces, the optical film comprising: a plurality of extended prisms formed in the first structured surface; a plurality of extended lenslets formed in the second structured surface; and wherein the prisms and lenslets are arranged in a one-to-one correspondence of lenslets to prisms; and wherein at least some of the prisms are compound prisms, each compound prism having two inclined surfaces that are compound and a sharp vertex, each such compound inclined surface of each compound prism having a tip portion, a base portion, and an intermediate portion disposed between the tip portion and the base portion, the intermediate portion forming a first profile shape with the tip portion and a second profile shape with the base portion, and wherein the first profile shape is concave and the second profile shape is convex, or the first profile shape is convex and the second profile shape is concave.