Patent ID: 7374806

Claim:
An optical information medium comprising a supporting substrate, an information recording surface on the supporting substrate, and a light transmission layer on the information recording surface which is used by being irradiated with recording light and/or reading light through the light transmission layer, wherein the light transmission layer is a cured substance of an active energy ray-curable composition containing a urethane di(meth)acrylate compound (A) of the following general formula (I) and a urethane di(meth)acrylate compound (B) synthesized from an isocyanate compound, poly-hydric alcohol and hydroxyl group-containing (meth)acrylate, other than the compound (A), and the cured substance has a tensile elastic modulus of 600 MPa or more and 1300 MPa or less at 25° C. and a light transmittance of 80% or more at wavelength of 400 nm: wherein, R 1 represents an alicyclic diisocyanate residue, R 2 represents an alkylene group or an organic group containing a cycloalkyl group or ester bond, and R 3 represents a hydrogen atom or methyl group.