Patent ID: 9541680
Date: 2017-01-10
CPC Classifications: G02B,Y10T

Claim:
1. A composite optical film, comprising: a structured substrate including a structured light incidence surface and a light emitting surface opposite to the structured light incidence surface, wherein the structured light incidence surface includes longitudinal prism structures or longitudinal lens structures arranged in rows; and a support base plate adjacent to the light emitting surface of the structured substrate, the support base plate having a light incidence surface on one side and a light emitting surface on another side opposite to the light incidence surface, wherein at least one of the light incidence surface and the light emitting surface of the support base has a plurality of buried particles; wherein at least one portion of the buried particles are protruded on the light emitting surface of the support base plate; wherein the longitudinal prism structures or the longitudinal lens structures in the rows are transversely arranged, wherein crests of the prism structures or the lens structures in adjacent rows are substantially parallel to each other and distances between the adjacent crests are constant; wherein heights of the crests of the longitudinal prism structures or the longitudinal lens structures in the rows vary along a longitudinal direction.