Antireflective glass ceramic articles and methods of making the same

Abstract

An anti-reflective glass-ceramic article is described herein comprising a glass-ceramic body comprising a first major surface, a second major surface opposite the first major surface, and a refractive index-modified layer positioned adjacent the first major surface and extending into a thickness of the glass-ceramic body. Within the refractive index-modified layer at a depth of 25 nm into the glass-ceramic body from the first major surface is present a first glass-ceramic composition having a first refractive index and a first crystallinity. At a midpoint depth between the first major surface and the second major surface a second glass-ceramic composition is present having a second refractive index and a second crystallinity. The first refractive index may be at least 0.01 less than the second refractive index. The first crystallinity may be about 50% to about 90% of the second crystallinity.

Dependencies are inferred from the claim text.