High dispersion optical glass

Details High dispersion optical glass High dispersion optical glass

1993-05-26

1994-07-26

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 63, 501903, C03C 3112, C03C 3097, C03C 400

Patent

active

053327004

ABSTRACT:
An optical glass which is a SiO.sub.2 -Nb.sub.2 O.sub.5 -R'.sub.2 O (where R' is an alkali metal element)-F system of a specific composition range exhibits optical constants of a refractive index (Nd) of about 1.52-1.67 and an Abbe number (.upsilon. d) of about 32-50, is free of PbO and has an improved light transmissivity.

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