Patent ID: 9557448
Date: 2017-01-31
CPC Classifications: G02B,G02F,G06F

Claim:
1. A coherence prevention film comprising a film substrate and a plurality of projections formed on a surface of the film substrate, wherein the projections are arranged in that their sectional areas of sections that are parallel to a surface of the film substrate become gradually smaller in approaching from a base end portion side towards a tip end portion side, wherein a lateral surface projection occupying area rate, which is a ratio of a projection area in which all of the lateral surfaces of a single projection are projected on a surface of the film substrate from a direction that is perpendicular to the surface of the film substrate to a divided area on the surface of the film substrate with respect to the single projection, is not more than 0.25%; and wherein a column density, which is a ratio of a base area of a single projection to a divided area on the surface of the film substrate with respect to the single projection, is not more than 2.5%.