Patent ID: 7192897
Filing Date: 2007-03-20
Classification: C03C,G02B

Abstract:
1. Near-infrared light-absorbing glass comprising, denoted as cationic percentages, 23 to 41 percent of P 5+ , 4 to 16 percent of Al 3+ , 11 to 40 percent of Li + , 3 to 13 percent of Na + , 12 to 53 percent of R 2+ (where R 2+ denotes the total of Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , and Zn 2+ ), 0 to 6 percent of Zn 2+ and 2.6 to 4.7 percent of Cu 2+ , and F − and O 2− as anionic components: wherein the glass is fluorophosphates glass essentially comprising no arsenic and no lead.