Glasses with very high index of refraction and low density

Details Glasses with very high index of refraction and low density Glasses with very high index of refraction and low density

1993-02-12

1994-02-22

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501901, 501 79, C03C 3068, C03C 3066

Patent

active

052886697

ABSTRACT:
This invention relates to glasses exhibiting refractive indices higher than 1.880, Abbe numbers of at least 29, densities lower than 4.1, good chemical durability and stability against devitrification, and an integrated transmission over the range of 380-800 nm at a thickness of 10 mm greater than 79%, the glasses consisting essentially, expressed in terms of weight percent on the oxide basis, of

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Derwent Publications Ltd., London, FB; AN 87-167506 & JP-A-62 100 449 (Ohara KK) May 9, 1987.
Derwent Publications Ltd., London, GB; AN 85-194363 & JP-A-60 122 745 (Hoya Corp.) Jul. 1, 1985.

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