Preferably Pb-free and As-free optical glasses with...

Details Preferably Pb-free and As-free optical glasses with... Preferably Pb-free and As-free optical glasses with...

2005-11-01

2005-11-01

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S066000, C501S068000, C501S902000, C501S903000

Reexamination Certificate

active

06960545

ABSTRACT:
The present invention relates to preferably lead-free and arsenic-free optical glasses, having a refractive index of 1.48≦nd≦1.56, an Abbe number of 64≦νd≦72, a low transformation temperature (Tg≦500° C.) and good ion exchange properties, as well as good chemical resistance and crystallization stability, and comprising the following composition (in % by weight):SiO253-58B2O311-15Al2O316-20Na2O 0-13K2O 0-13ΣM2O 9-13F0.5-4  The glass may additionally contain standard refining agents. The invention also relates to the use of the optical glasses according to the invention in the application areas of imaging, projection, telecommunications, optical communication technology and/or laser technology.

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