Loading patent…
AssigneeSchott Glaswerke
InventorsKarl Mennemann, Georg Gliemeroth, Ludwig Ross, Burkhard Speit, Volkmar Geiler, Hans-Georg Krolla, Lothar Meckel
Estimating the term…
An optical and ophthalmic glass with high refractive index, high Abbe number and low density, which is distinguished by good chemical stability, good crystallization behavior and capability for chemical hardening, comprises (in % by weight): SiO.sub.2 --47 to 75 B.sub.2 O.sub.3 --1 to 20 Al.sub.2 O.sub.3 --0 to 10 P.sub.2 O.sub.5 --0 to 5 Li.sub.2 O--0 to 15 Na.sub.2 O--0 to 10 K.sub.2 O--0 to 10 CaO--0 to 20 MgO--0 to 15 SrO--0 to 4 BaO--0 to 4 ZnO--0 to 5 TiO.sub.2 --1 to 15 ZrO.sub.2 --0 to 8 Nb.sub.2 O.sub.5 --0 to 5 and F----0 to 5.
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
An optical and ophthalmic glass with a refractive index greater than or equal to 1.56, an Abbe number greater than or equal to 40 and a density less than or equal to 2.70 g/cm.sup.3, consisting essentially of (in % by weight):
Dependencies are inferred from the claim text.