OPTICAL PROPERTIES OF SOME ROCK SAMPLES
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Date
1972
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The real and imaginary indices of refraction over a wide range of wavelengths have been found for several common terrestrial rocks and glasses. For wavelengths from 0.3 to 8 microns, we have measured the reflectance of polished samples at normal incidence and the transmission of a set of thin sections; we have evaluated the indices by means of Fresnel’s equation and Beer’s Law. From 8 to 50 microns the indices were found from a simple dispersion analysis of the reflection spectra. The measurements were made with a Cary 14 Spectrophotometer and a Perkin-Elmer 621 Infrared Spectrophotometer. These methods of determing the indices of refraction are particularly successful for materials capable of being highly polished, and provide useful approximations for materials which cannot be polished well. These data should be of value to studies of radiative transfer in dust-filled atmospheres, and to optical studies of rock surfaces.
Description
This research was supported by the Atmospheric Sciences Section, National Science Foundation, under Grant GA 23945.""
Author Institution: Space Sciences Division, National Aeronautics and Space Administration, Ames Research Center; Laboratory for Planetary Studies, Cornell University
Author Institution: Space Sciences Division, National Aeronautics and Space Administration, Ames Research Center; Laboratory for Planetary Studies, Cornell University