Lead-free and preferably arsenic-free dense optical crown glass

Details Lead-free and preferably arsenic-free dense optical crown glass Lead-free and preferably arsenic-free dense optical crown glass

2006-11-28

2006-11-28

Lorengo, J. A. (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S047000, C501S048000

Reexamination Certificate

active

07141524

ABSTRACT:
The lead-free, Li2O-free, CuO-free and preferably arsenic-free optical glass is suitable for applications in the fields of imaging, projection, telecommunications, optical communication technology and/or laser technology, and has a refractive index ndof 1.55≦nd≦1.60, an Abbe number Vdof 54≦Vd≦63 and a transformation temperature Tg≦500° C. This optical glass has good production and processing properties and crystallization stability, and, at the same time, advantageously does not contain PbO and As2O3. These glasses contain, in percent by weight based on oxide content: P205, 43-56; ZnQ, 21-36; Al2O3, 0-6; Na2O, 0-16; K2O, 0-8; ΣM2O ≦16; MgO, 0-5; CaO, 0-5; BaO, 3-14; B2O3, 0-8; La2O3, 0-7. In addition, it may also contain standard refining agents.

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