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Record 16 of 9176
Spectral reflectance and emittance of particulate materials. I - Theory. II - Application and results
Author and Affiliation:
Emslie, A. G.
Aronson, J. R.(Arthur D. Little, Inc., Cambridge, Mass., United States)
Abstract: The sizes, shapes, and complex refractive indices of particles are calculated in a study of the IR spectral reflectance of a semiinfinite medium composed of irregular particles of different materials. Geometric optics techniques with corrections for additional absorption due to particle edges and asperities is used in scattering and absorption calculations for particles larger than the wavelength. A Lorentz-Lorenz model is used to derive the averaged complex index of the medium, assuming that its individual particles are ellipsoids. Experimental results obtained on a Michelson interferometer for the spectral emittance of particulate mineral materials are compared with theoretical results. Good agreement between the experimental and theoretical results suggests the applicability, in remote IR spectroscopy, of the theoretical concepts applied in this study.
Publication Date: Nov 01, 1973
Document ID:
19740028160
(Acquired Dec 04, 1995)
Accession Number: 74A10910
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Journal Article
Publication Information: Applied Optics; 12; Nov. 197
Publisher Information: United States
Contract/Grant/Task Num: NAS9-10875; NAS9-8396; F19628-C-0353
Financial Sponsor: NASA; United States
Description: 22p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EMITTANCE; INFRARED SPECTRA; MINERALS; OPTICAL REFLECTION; PARTICLE THEORY; SPECTRAL REFLECTANCE; COMPLEX VARIABLES; ELECTROMAGNETIC ABSORPTION; LIGHT SCATTERING; MICHELSON INTERFEROMETERS; MICROSTRUCTURE; PARTICLE SIZE DISTRIBUTION; RAY TRACING
Imprint And Other Notes: Applied Optics, vol. 12, Nov. 1973, p. 2563-2584.
Miscellaneous Notes: p. 2563-2584
Availability Source: Other Sources
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