Technique for measuring the refractive index and its change with temperature in the infrared*
- 1 November 1975
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 65 (11) , 1264-1266
- https://doi.org/10.1364/josa.65.001264
Abstract
A simple method for measuring refractive index in the infrared is described. It uses autocollimation from the front surface of a prism and requires only that the receiver be moved to measure a new deviated ray when either the wavelength of the source or the temperature of the sample is changed. An error analysis that includes consideration of the evacuated sample space and wedge in the chamber windows shows that errors as low as one part in the fourth decimal place can be obtained.Keywords
This publication has 5 references indexed in Scilit:
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- Refractive Properties of Barium Fluoride*Journal of the Optical Society of America, 1964
- Tables of the Refractive Index for Standard Air and the Rayleigh Scattering Coefficient for the Spectral Region between 02 and 200 μ and Their Application to Atmospheric OpticsJournal of the Optical Society of America, 1957
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