Optical light weight glass with a refractive index of >1.70,

Details Optical light weight glass with a refractive index of >1.70, Optical light weight glass with a refractive index of >1.70,

1983-04-27

1985-07-02

Bell, Mark

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 58, 501 59, 501 61, 501 62, 501 63, 501 64, 501 65, 501 66, 501 67, 501 75, 501 76, 501 78, 501 79, 501901, 501903, C03C 308, C03C 310, C03C 330

Patent

active

045268746

ABSTRACT:
An optical glass with the familiar optical position of n.sub.d >1.70 and v.sub.d >22, which differs from the familiar optical glasses of the optical position due to its lower density and good chemical stability, and is composed of (in percent by weight): SiO.sub.2 25-42, TiO.sub.2 15-35, B.sub.2 O.sub.3 0.5-7, BaO 3-13, CaO 1-3, Nb.sub.2 O.sub.5 1-20, GeO.sub.2 0-2, Al.sub.2 O.sub.3 0-4, Na.sub.2 O 7.5-15, Li.sub.2 O 0-9, K.sub.2 O 2-10, SrO 0-6, ZnO 0-5, ZrO.sub.2 0-3, and WO.sub.3 0-3.

REFERENCES:
patent: 3898093 (1975-08-01), Faulstich et al.
patent: 4149895 (1979-04-01), Boudot et al.
patent: 4390638 (1983-06-01), Mennemann et al.

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