Aluminosilicate glass

Details Aluminosilicate glass Aluminosilicate glass

2007-01-30

2007-01-30

McNeil, Jennifer C. (Department: 1775)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

C428S373000, C428S426000, C501S037000, C501S069000

Reexamination Certificate

active

10785811

ABSTRACT:
A short optical glass is disclosed which does not comprise any silver, copper, thallium, lead or boron and is particularly suited for the application imaging, projection, telecommunication, optical information technology, and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably the glass has a refractive index of 1.55≦nd≦1.65 and an Abbe coefficient of 48≦vd≦57 and also has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to <50 wt.-% SiO2; 1 to 10 wt.-% Al2O3; 5 to 15 wt.-% Na2O+K2O+CS2O+Li2O; 20 to 30 wt.-% BaO; 0 to 15 wt.-% ZnO; 0 to 10 wt.-% La2O3; 0 to 10 wt.-% ZrO2; 0 to 6 wt.-% P2O5; 0 to 8 wt.-% MgO+CaO+SrO; 0 to 3 wt.-% of other oxides, and Cs2O<1, Li2O<1, and TiO2<1 wt.-%.

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