Abstract

Three empirical relationships have been derived between reciprocals of pairs of partial dispersions of the ordinary optical glasses. The relationships are of the form X=a+b Y+cY² where X and Y are variable and a, b, and c the empirical constants. a, b, and c were determined by least squares making use of the data on sixteen optical glasses manufactured by The Bausch and Lomb Optical Company. The fit obtained appears to hold within the 5th place experimental error of the index determinations. Determination of N_D and N_h and the use of the three empirical relationships quoted above allows calculation of N_F, N_C, N_G′, and V in a simple manner. These relationships, however, do not apply to the barium glasses.

© 1948 Optical Society of America

Light Scattering in Optical Glass*

D. H. Rank and A. E. Douglas
J. Opt. Soc. Am. 38(11) 966-970 (1948)

Multi-Prism Spectrographs with Glass Optics by Carl Zeiss, Jena

G. Hansen
J. Opt. Soc. Am. 38(9) 759-766 (1948)

The Design of Triplet Anastigmat Lenses of the Taylor Type

Robert E. Stephens
J. Opt. Soc. Am. 38(12) 1032-1039 (1948)

Color Variations in Glasses Containing Iron

John W. Forrest, Norbert J. Kreidl, and Tyler G. Pett
J. Opt. Soc. Am. 38(6) 554-560 (1948)

The Effect of High Index Glasses on the Field Characteristics of Photographic Objectives

G. H. Aklin
J. Opt. Soc. Am. 38(10) 841-844 (1948)