Aluminophosphate glass containing copper (II) oxide and uses thereof for light filtering

摘要

Aluminophosphate glasses containing copper(II) oxide having a low transmission in the near infrared range with a steep absorption edge, as well as a very uniform high transparency in the visible range and excellent chemical durability under conditions of exposure to elevated temperature and high relative humidity, are particularly suitable as filter glasses for use in CCD and CMOS camera and detector applications and as filter glass, e.g., for goggles and color displays. The glass comprising, in % by weight on an oxide basis: 65-80 of P₂O₅; 4-20 of Al₂O₃; 0-<5.5 OF B₂O₃, 0-2.1 of La₂O₃; 0-2.1 of Y₂O₃, 0-3 of SiO₂; >2-12.5 of Li₂O; 0-6 of Na₂O; 0-4 of K₂O; 0-2.5 of Rb₂O; 0-2.5 of Cs₂O; 0-7.9 of MgO; 0-5 of CaO; 0-5 of SrO; 0-10 of BaO; 0-8 of ZnO; 0-5 ZrO₂, 5-15 of CuO; and 0-0.5 of V₂O₅, wherein the sum of alkaline-earth metal oxides+ZnO (SigmaR'O) is <18; and the sum of CuO+V₂O₅ is 5-15.