The lead-free optical glass can be used in the fields of imaging, sensor
technology, microscopy, medical technology, digital projection,
photolithography, laser technology, wafer/chip technology, as well as of
telecommunications, optical communication engineering and optics/lighting
in the automotive sector. It has a refractive index n.sub.d of
1.82.ltoreq.n.sub.d.ltoreq.2.00 and/or an Abbe number v.sub.d of
18.ltoreq.v.sub.d.ltoreq.28 with good chemical stability, excellent
crystallization stability and the following composition, in wt. based on
oxide content, of:
TABLE-US-00001
P.sub.2O.sub.5 12-35
Nb.sub.2O.sub.5 30-50
Bi.sub.2O.sub.3 2-13
GeO.sub.2 0.1-7
Li.sub.2O .ltoreq.6
Na.sub.2O .ltoreq.6
K.sub.2O .ltoreq.6
Cs.sub.2O .ltoreq.6
MgO .ltoreq.6
CaO .ltoreq.6
SrO .ltoreq.6
BaO 7-<17
ZnO .ltoreq.6
TiO.sub.2 .ltoreq.7
ZrO.sub.2 .ltoreq.7
WO.sub.3 2-14
F .ltoreq.6.
