Optical glass for a press lens

Details Optical glass for a press lens Optical glass for a press lens

1991-04-01

1993-04-20

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 75, 501903, C03C 3064, C03C 3108

Patent

active

052042928

ABSTRACT:
An optical glass for a press lens composed of 25 to 41 mol % of SiO.sub.2, 10 to 30 mol % of B.sub.2 O.sub.3, 18 to 40 mol % of PbO, 1 to 10 mol % of Na.sub.2 O, 1 to 15 mol % of K.sub.2 O, 2 to 20 mol % of Li.sub.2 O, and 0.3 to 3 mol % of Al.sub.2 O.sub.3.

REFERENCES:
patent: 4460696 (1984-07-01), Harada et al.
patent: 4562162 (1985-12-01), Sagara

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