Abstract

An instrument which can be used from 200 mμ to 1000 mμ with transparent liquids for the determination of the refractive index, relative to air with an error of ±.0002 is described. A cell consisting of two quartz plates and an air space is rotated in the liquid through which is passing a parallel monochromatic beam of light, and the critical angle at the quartz air interface is determined. The instrument in its present form is particularly adapted for use with a Beckman Model DU quartz spectrophotometer. Results for water and n-hexane are given as examples.

© 1947 Optical Society of America

Transmission Measurements with the Beckman Quartz Spectrophotometer

Kasson S. Gibson and Margaret M. Balcom
J. Opt. Soc. Am. 37(8) 593-608 (1947)

The Photoelectric Measurement of Fluorescence Spectra

R. A. Burdett and L. C. Jones
J. Opt. Soc. Am. 37(7) 554-557 (1947)

A Rapid Non-Destructive Method of Determining the Refractive Index of Lens Components, Using a Spectrometer

S. Jacobsohn, E. Beloian, and H. Hess
J. Opt. Soc. Am. 37(12) 941-943 (1947)

The Refractive Indices of Alcohol, Water, and Their Mixtures at High Pressures

Joseph S. Rosen
J. Opt. Soc. Am. 37(11) 932-938 (1947)

Infra-Red Spectrometry from 15 to 25μ

Earle K. Plyler
J. Opt. Soc. Am. 37(10) 746-753 (1947)