Patent ID: 8039065

Claim:
An antireflection film comprising: a transparent support; and a low-refractive index layer having a lower refractive index than the transparent support, wherein the low-refractive index layer is an outermost layer of the antireflection film, and the low-refractive index layer comprises: a hollow silica particle; and a compound lowering a surface free energy of the antireflection film, wherein a silicone is segregated at an outer surface of the low-refractive index layer such that a spectral intensity ratio Si/C in a photoelectron spectrum at the outer surface is larger by at least 5 times than that at a depth from the outer surface, the depth being equal to 80% of a thickness of the low-refractive index layer, wherein the compound is a silicone compound having a plurality of (meth)acryloyl groups at a terminal or a side chain of a compound chain that contains a plurality of dimethylsilyloxy units as repetitive units, and having a molecular weight of from 3,000 to 30,000, wherein the low-refractive index layer comprises a binder, and the compound comprises a reactive group with the binder, wherein the binder consists of a (co)polymer of at least one monomer having two or more ethylenic unsaturated groups, wherein the monomer having two or more ethylenic unsaturated groups consists of ethylene glycol di(meth)acrylate, 1,4-cyclohexane diacrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,2,3-cyclohexane tetramethacrylate, polyurethane polyacrylate, polyester polyacrylate, or a combination thereof, wherein the hollow silica particle has a porosity x of from 10 to 60%, the porosity being represented by the following formula (V): x =(4 πa 3 /3)/(4 πb 3 /3)×100 (V) wherein a represents a radius of a hollow of the particle and b represents a radius of an outer shell of the particle.