Optical glass and optical element

Details Optical glass and optical element Optical glass and optical element

2011-08-30

2011-08-30

Group, Karl E (Department: 1731)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S045000, C501S046000, C501S048000

Reexamination Certificate

active

08008219

ABSTRACT:
An optical glass includes, based on the total weight of the optical glass: not less than 35 weight percent and less than 45 weight percent of P2O5; not less than 0.5 weight percent and less than 10 weight percent of B2O3; 0 to 16 weight percent of Al2O3; 0 to 2.5 weight percent of SiO2; 0 to 26 weight percent of BaO; 0 to 20 weight percent of SrO; 23 to 49 weight percent of ZnO; more than 6 weight percent and not more than 20 weight percent of CaO; 0 to 16 weight percent of MgO; not less than 0 weight percent and less than 1 weight percent of Li2O; 3 to 19 weight percent of Na2O; and 0 to 20 weight percent of K2O, where the total weight of BaO, SrO, ZnO, CaO, and MgO and the total weight of Li2O, Na2O and K2O are predetermined amounts.

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patent: 2005/0188724 (2005-09-01), Ikenishi et al.
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patent: 2004-217513 (2004-08-01), None
patent: 2005-053749 (2005-03-01), None
patent: 2007-145613 (2007-06-01), None

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