Optical glass containing bismuth oxide

Optical glass containing bismuth oxide

Optical glass fiber having cover glass of sodium zinc alumino bo

Optical glass fibres and method of forming such fibres

Optical glass for a press lens

Optical glass for mold pressing having softening capability at l

Optical glass for molding

Optical glass for optical paths

Optical glass for polarizing optical system, production...

Optical glass for precision molding

Optical glass for precision molding

Optical glass for precision molding

Optical glass for precision press molding and optical element

Optical glass having a low specific gravity

Optical glass having a negative anomalous dispersion

Optical glass having an anomalous dispersion

Optical glass having n.sub.D =1.63.+-.(1.5.times.10.sup.-2), v.s

Optical glass of negative anomalous partial dispersion in the bl

Optical glass suffering little change in refractive index by...

Optical glass suffering little change in refractive index by...