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Emission polarization study on quartz and calcite.Calculation of the spectral emission polarization of quartz and calcite polished plates for observation angles of 20 and 70 deg by the substitution of complex index of refraction values for each mineral into Fresnel's equations. The emission polarization is shown to be quite wavelength-dependent, demonstrating that selected narrow or medium-width spectral bands exhibit a significantly higher percentage of polarization than a broad spectral band for these two minerals. Field measurements with a broadband infrared radiometer yield polarizations on the order of 2% for a coarse-grained granite rock and beach sand (both quartz-rich). This implies that a more sensitive detector with a selected medium-width filter may be capable of measuring emission polarization accurately enough to make this parameter useful as a remote sensing tool for discrimination among rocks on the basis of texture.
Document ID
19720056937
Document Type
Reprint (Version printed in journal)
Authors
Vincent, R. K. (Michigan, University Ann Arbor, Mich., United States)
Date Acquired
August 6, 2013
Publication Date
September 1, 1972
Publication Information
Publication: Applied Optics
Volume: 11
Subject Category
PHYSICS, SOLID-STATE
Funding Number(s)
CONTRACT_GRANT: NAS9-9784
Distribution Limits
Public
Copyright
Other