US 7,598,192 B2
Optical glass
Silke Wolff, Hueckeswagen (Germany); Goran Sabljic, Mainz (Germany); and Ute Woelfel, Mainz-Laubenheim (Germany)
Assigned to Schott AG, Mainz (Germany)
Filed on Dec. 08, 2006, as Appl. No. 11/608,620.
Claims priority of application No. 10 2005 062 640 (DE), filed on Dec. 23, 2005; application No. 10 2006 045 025 (DE), filed on Sep. 23, 2006; and application No. 10 2006 052 787 (DE), filed on Nov. 09, 2006.
Prior Publication US 2007/0149381 A1, Jun. 28, 2007
Int. Cl. C03C 3/064 (2006.01); C03C 3/062 (2006.01); C03C 3/066 (2006.01); C03C 3/097 (2006.01); C03B 7/00 (2006.01); C03B 9/16 (2006.01); C03B 9/20 (2006.01)
U.S. Cl. 501—77  [501/73; 501/79; 501/63; 55/226] 39 Claims
 
1. An optical glass having a composition, in percent by weight based on oxide content, of:
   
  SiO2 19-45
  B2O3   3-7.5
  Nb2O5 25-31
  K2O 2-8
  TiO2 0.1-2  
  ZrO2  6-10
  Ta2O5 0.5-8.