FIELD: physics.
SUBSTANCE: invention relates to an optical film, particularly used on a display surface in a liquid crystal display, a method of making said film, an antiglare film, a polariser with an optical layer and a display device. The optical film has a base and an optical layer on the base. The optical layer has a surface with an irregular shape, and the irregular shape is obtained by applying a coating material containing fine particles and a resin onto the base, distributing the fine particles densely in some portions and sparsely in other portions by convection which occurs in the coating material, and curing the coating material. The resin contains 3 wt % or more but not more than 20 wt % of a polymer; the fine particles are organic fine particles having average diameter of 2 mcm or more but not more than 8 mcm; the ratio ((D/T)×100) of the average diameter D of fine particles to the average thickness T of the film of the optical layer is 20% or more but not more than 70%, and image definition in transmitted light, measured using an optical comb with width of 0.125 mm, is 45 or higher. Surface roughness is equal to zero. On the other side, a completely flat surface results in the problem a clearly visible reflected image.
EFFECT: invention prevents reflection and influx of black colour by creating a smooth wave-like profile which cannot be measured as surface roughness.
51 cl, 21 dwg
