Patent ID: 7803449
Filing Date: 2010-09-28
Classification: G02B,G02F,Y10T

Abstract:
1. An optical film comprising: a transparent support; and a layer having internal scattering properties, wherein the optical film has an image sharpness, as measured in an optical comb width of 0.5 mm in conformity to JIS K7105, of from 30.0% to 99.9%, a haze value as caused by surface scattering of not more than 1.0%, and a haze value as caused by internal scattering of from 20 to 32%, wherein the layer having internal scattering properties contains a translucent resin and at least one of a translucent particle and has a thickness of from 3 μm to 12 μm; the translucent particle has a particle size of from 3 to 4 μm and is contained in an amount of from 5 to 30% by weight of a whole of solids contained in the layer having internal scattering properties; the translucent resin has a refractive index falling within the range of 1.52±0.02; and 30% or more of the translucent particle has a difference in refractive index from the translucent resin of 0.008 or more and not more than 0.05.