Patent ID: 11667561

Abstract:
A composition for a glass material comprising, on an oxide basis: one or more network formers chosen from the group of silicon dioxide (SiO2) and phosphorous pentoxide (P2O5); one or more alkali metal oxides chose from the group consisting of lithium oxide (Li2O) and sodium oxide (Na2O); 8 to 15 percent by weight zirconium oxide (ZrO2); and one transition metal oxide consisting of 9 to 45 percent by weight niobium pentoxide (Nb2O5). In an embodiment, the composition consists of: 35 to 60 percent by weight silicon dioxide (SiO2); 9.25 to 15.0 percent by weight lithium oxide (Li2O); 0.5 to 2 percent by weight sodium oxide (Na2O); 8 to 15 percent by weight zirconium oxide (ZrO2); 0 to 3.5 percent by weight phosphorous pentoxide (P2O5); and 9 to 45 percent by weight niobium pentoxide (Nb2O5). In an embodiment, the glass material is a light guide for an augmented reality device.