Patent ID: 8485673
Filing Date: 2013-07-16
Classification: B29D,G02B,Y10T

Abstract:
1. An optical layered body having a light-transmitting substrate and an antiglare layer provided on the light-transmitting substrate, wherein the antiglare layer has a surface roughness at its outermost surface, and is formed by using a composition for an antiglare layer, containing a resin and fine particles, and a difference (n) in refractive indexes between the resin and the fine particle is 0.2 or less, the surface roughness is a gradual surface roughness which is defined by Sm, θa and Rz and the gradual surface roughness means a shape in which peaks are like hills with gentle slope and on the other hand, valleys are nearly flat rather than a valley configuration because the valleys are extremely gradual valleys compared with peaks, and when denoting a mean spacing of profile irregularities of the optical layered body by Sm, a mean inclination angle of profile irregularities by θa, and a mean roughness of the surface roughness by Rz, Sm is 50 μm or more and less than 100 μm, θa is 0.1° or more and 1.0° or less, and Rz is more than 0.2 μm and 1.0 μm or less, and wherein the antiglare layer comprises an under coat rough surface layer and a surface adjustment layer provided on the under coat rough surface layer, wherein the surface adjustment layer is 1.5 μm or more and 15 μm or less.