CHANGES IN THE INDICES OF REFRACTION AND LIQUIDUS OF A BARIUM CROWN GLASS PRODUCED BY THE PARTIAL SUBSTITUTION OF SOME OXIDES*
- 1 May 1948
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 31 (5) , 132-144
- https://doi.org/10.1111/j.1151-2916.1948.tb14281.x
Abstract
Optical glasses with high indices of refraction and Abbe values are very desirable for wide angle lenses. In order to determine the range of compositions in which glasses of this type could be produced, oxides of lithium, beryllium, calcium, boron, lanthanum, or thorium were substituted for barium oxide or silica in a three‐or‐four component base glass. Substitutions were made on a mole‐for‐mole basis. The indices of refraction for the C, D, F, and G lines and the liquidus were determined for each glass. Experimental glasses with indices of refraction (nD) and Abbe values from 1.600 to 1.714 and 62.2 to 52.7, respectively, were made in small platinum crucibles.Keywords
This publication has 3 references indexed in Scilit:
- Hygroscopicity of optical glasses as an indicator of serviceabilityJournal of Research of the National Bureau of Standards, 1946
- Studies of the chemical durability of glass by an interferometer methodJournal of Research of the National Bureau of Standards, 1941
- EFFECT OF ALUMINA ON DEVITRIFICATION OF SODA‐LIME‐SILICA GLASSES*Journal of the American Ceramic Society, 1939