Patent ID: 6995101
Filing Date: 2006-02-07
Classification: C03C

Abstract:
1. An optical glass comprising as molar percentages, 15–30 percent of P 2 O 5 ; 0.5–15 percent of B 2 O 3 ; 5–25 percent of Nb 2 O 5 ; 6–40 percent of WO 3 ; 4–45 percent of at least one R′ 2 O selected from the group consisting of Li 2 O, Na 2 O, and K 2 O; 1–5 percent of K 2 O; 0–30 percent (excluding 30 percent) of at least one RO selected from the group consisting of BaO, ZnO, and SrO; and 2–9 percent of TiO 2; with the total content of the above-stated components being equal to or more than 95 percent, and wherein the optical glass comprises 2–30 molar percent of Li 2 O and does not comprise an amount of GeO 2 .