Optical glass

Details Optical glass Optical glass

2008-09-26

2009-08-11

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S043000, C501S050000, C501S051000, C501S079000

Reexamination Certificate

active

07572747

ABSTRACT:
An optical glass consisting essentially of B2O3in an amount of 10-40 wt %, SiO2in an amount less than or equal to 5 wt %, ZnO in an amount less than or equal to 15 wt %, SrO in an amount less than or equal to 9 wt %, ZrO2in an amount less than or equal to 9 wt %, La2O3in an amount of 15 to 45 wt %, BaF2in an amount of 1 to 10 wt %, BaO in an amount less than or equal to 5 wt %, HfO2in an amount of 0.1 to 7.5 wt %, Gd2O3in an amount less than or equal to 16 wt %, CaO in an amount less than or equal to 7 wt %, ZrF4in an amount less than or equal to 5 wt %, Na2O in an amount less than or equal to 2 wt % and Y2O3in an amount less than or equal to 16 wt %. The optical glass has a glass transition temperature in a range of 500-670° C. and a refractive index (nd) in a range of 1.60 to 2.00.

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patent: 2003/0050177 (2003-03-01), Uehara
patent: 53004023 (1978-01-01), None

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