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Polarization in a mineral absorption bandA theoretical and experimental study was undertaken to examine the polarimetric properties of light reflected from a particulate surface in the spectral region (0.7 to 1.1 micrometer) of a mineral electronic-transition absorption band. The purpose of the investigation was to show that spectral polarimetry is an alternative diagnostic tool to absolute reflectivity measurements for some applications, notably the determination of absorption-band positions for the lunar surface. The major results are: (1) polarization increases significantly in an absorption band at large phase angles; (2) the wavelength of the maximum of the polarization variation corresponds directly with the center of the absorption band; (3) the amount of increase of polarization for minerals with an absorption band is dependent on particle size; and (4) the fractional change of polarization with wavelength is greater for mixtures with transparent minerals than with absorbing minerals. The magnitude of change, however, is greater for mixtures with absorbing minerals.
Document ID
19740049414
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Pieters, C. E.
(MIT Cambridge, Mass., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Colloquium on the Planets, stars and nebulae studied with photopolarimetry
Location: Tucson, AZ
Start Date: November 15, 1972
End Date: November 17, 1972
Accession Number
74A32164
Funding Number(s)
CONTRACT_GRANT: NGR-22-009-583
CONTRACT_GRANT: NGL-22-009-350
Distribution Limits
Public
Copyright
Other

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