Patent ID: 7112359

Claim:
A multilayer optical article comprising: a first substrate; a second substrate; a third substrate; a reflective layer disposed between the first substrate and the third substrate; a first layer of partially cured adherent, wherein the first layer of partially cured adherent is disposed between a first surface of the first substrate and the second substrate; and a second layer of partially cured adherent, wherein the second layer of partially cured adherent is disposed between a second surface of the first substrate and the third substrate, wherein the first and second adherent comprise a photopolymer such that the article is capable of storing data in a holographic data storage system, and wherein the multilayer optical article has a surface flatness of about 0.05 waves/cm to about 1 wave/cm at wavelengths of about 300 nanometers to 1600 nanometers, wherein a first layer bounded by a first surface of the first substrate and a first surface of the second substrate and a second layer bounded by a first surface of the first substrate and a first layer of the third substrate each have a transmission flatness of about 0.05 waves/cm to about 1 wave/cm at wavelengths of about 300 nanometers to 1600 nanometers.