Corning Incorporated
High hardness articles including an optical layer and methods for making the same

Abstract:

An article, comprising an optical layer disposed on a transparent layer, can have a maximum hardness of about 10 GigaPascals (GPa) to about 50 GPa. The optical layer can comprise a first portion and a second portion that are contiguous with one another at one major surface the optical layer. The portions may exhibit specific differences in average reflectance value, observed color, and/or angular color shift relative to each other. In some embodiments, a photopic average reflectance of the first portion may differ from an average reflectance of the second portion by about 5% or more. In other embodiments, a color of the first portion can have a color difference from a color of the second portion of about 4 or more in CIE color coordinate space.