Patent ID: 6207263
Filing Date: 2001-03-27
Classification: G02B,Y10T

Abstract:
An anti-reflection film having an intermediate refractive index layer, a high refractive index layer and a low refractive index layer formed in this order on a transparent base film through a hard coat layer, said anti-reflection film comprising:the low refractive index layer comprising an SiO.sub.x layer where x is 1.5 to 4.0;the intermediate refractive index layer comprising a coating of a composition comprising a binder and ultrafine particles having a refractive index of 1.5 or more; andthe high refractive index layer; andsaid anti-reflection film having:the relationship 2.20>refractive index of the high refractive index layer>refractive index of the intermediate refractive index layer>refractive index of the low refractive index layer>1.40;the thickness of each refractive index layer being 80 to 110 nm for the low refractive index layer, 30 to 110 nm for the high refractive index layer, and 50 to 100 nm for the intermediate refractive index layer; andan optical film thickness D not larger than the wavelength of visible light (D=n.multidot.d wherein n is the refractive index of the intermediate refractive index layer and d is the thickness of the intermediate refractive index layer).