| abstract |
The invention refers to an optical storage medium from which information can be read out and/or into which information can be recorded with a light beam ( 6 ), said optical storage medium comprising one or more base members ( 1 ) bearing on the side of the base members ( 1 ) on which the light beam ( 6 ) is incident, one or more information storage layers ( 3 ), at least one light-transmissive cover film ( 5 ) and one or more light-transmissive adhesive layers ( 4 ) bonding said cover films ( 5 ) to each other, to the surface ( 2 ) of the base members ( 1 ) on which the light beam ( 6 ) is incident and/or to one or more information storage layers ( 3 ), at least one of said adhesive layers being obtained by applying a curable liquid precursor of said adhesive with subsequent curing, said cover films ( 5 ) exhibiting a vertical birefringence of less than 0.001 at 20° C. at least at the wavelength or wavelength spectrum, respectively, of said light beam ( 6 ). |