Patent ID: 9115864
Filing Date: 2015-08-25
Classification: F21V,G02B,H01K

Abstract:
1. An optical interference filter comprising alternating layers of a high refractive index material and a low refractive index material, the high refractive index material consisting of niobia, titania, and incidental impurities, the high refractive index material containing either about 25 to less than 50 mol % titania and the balance niobia and incidental impurities, or containing about 60 to about 80 mol % titania and the balance niobia and incidental impurities, the high refractive index material comprising at least one of a 1:1 titania-niobia complex of TiO 2 .Nb 2 O 5 and a 1:3 titania-niobia complex of TiO 2 .3Nb 2 O 5 .