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Near-infrared light-absorbing glass, near-infrared light-absorbing element, near-infrared light-absorbing filter, and method of manufacturing near-infrared light-absorbing formed glass article, and copper-containing glass

  • US 7,192,897 B2
  • Filed: 07/03/2003
  • Issued: 03/20/2007
  • Est. Priority Date: 07/05/2002
  • Status: Expired due to Fees
First Claim
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1. Near-infrared light-absorbing glass comprising, denoted as cationic percentages, 23 to 41 percent of P5+, 4 to 16 percent of Al3+, 11 to 40 percent of Li+, 3 to 13 percent of Na+, 12 to 53 percent of R2+ (where R2+ denotes the total of Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+), 0 to 6 percent of Zn2+ and 2.6 to 4.7 percent of Cu2+, and F

  • and O2−

    as anionic components;

    wherein the glass is fluorophosphates glass essentially comprising no arsenic and no lead.

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