Abstract

A previously proposed refraction and dispersion equation, containing two empirical constants per component oxide, is improved by the addition, for each component, of a term containing a single new constant (the same for all components) and, for each of the components PbO, CaO, and BaO, of another term containing two additional constants characteristic of the component. Tests of the new equation with experimental data, both for simple (crystalline and vitreous) oxides and for 2-, 3-, and multicomponent glasses, show agreement, practically within the probable error of the experimental data, over the visible range of wave-lengths.

© 1942 Optical Society of America

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