GLASS SUBSTRATE WITH REFRACTION INDEX GRADIENT AND METHOD FOR MAKING SAME

摘要

The invention relates to a glass substrate that comprises at least one ionic pattern obtained by a process that comprises exchanging the alkaline ions of the glass for silver ions from an outer source, wherein said substrate is made of a glass having a specific composition and said ionic pattern has a refractive index variation higher than or equal to 0.03, a depth higher than or equal to 100 micrometers, and a light transmission coefficient at 410 nm (TL) higher than or equal to 60%.