JP2011112925A5 - - Google Patents

Claims (6)

A substrate;
A function-imparting layer formed on the substrate and having a non-uniform uneven structure on the surface ;
An optical film comprising:
An optical film in which an average wavelength (Sλa, μm) of the concavo-convex structure is 5 μm or more and 50 μm or less, and a center plane average roughness (SRa, μm) satisfies the following formula (1).
0.0015 × Sλa <SRa <0.010 × Sλa Formula (1)   The optical film according to claim 1, wherein the haze is 0.5% or more and 7.0% or less.   The optical image having a light-shielding portion and a light-transmitting portion is used, and the transmitted image definition at a 0.25 mm comb is 0.65 times or more of the transmitted image definition at a 2 mm comb. Optical film.   The optical film according to claim 1, wherein the concavo-convex structure is formed by interference exposure.   The function-imparting layer comprises a hard coat layer having a concavo-convex structure on the surface, a layer provided with a low refractive index layer on a hard coat layer having a concavo-convex structure on the surface, and a hard coat having a concavo-convex structure on the surface The optical film according to any one of claims 1 to 4, wherein the optical film is one in which a high refractive index layer and a low refractive index layer are sequentially provided on the layer. Paste comprising a display device on the surface using an adhesive optical film according to any one of claims 1 to 5.