Abstract

The formula describing the dependence of the refractive index of glasses on λ by means of the function defined in an earlier paper is transformed to a system based on the values n2n1 and nm, meaning the main dispersion and the refractive index for a medium wavelength, respectively. The δ function becomes zero throughout for normal glasses. It is shown under what conditions the established δ function can be simplified to a linear function of the wavelength or even to a single suitable value δ0. The accuracy of the diverse formulas is discussed by examples.

© 1973 Optical Society of America

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