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Optical Constants of Minerals and Other Materials from the Millimeter to the Ultraviolet.

ADA197803

Publication Date	1988
Personal Author	Bell, R. J.; Alexander, R. W.; Newquist, L. A.; Van Diver, R.; Ordal, M. A.
Page Count	140
Abstract	The optical constants of a wide variety of materials were measured for this contract period. This report covers the work done at the Univ. of Missouri-Rolla. The spectral range of the measurements covered from the millimeter to the ultraviolet. The millimeter and submillimeter (far infrared) measurements were made on the Rolla Campus and the infrared, visible and ultraviolet measurements were made on the Kansas City Campus. This wide spectral range means that Kramers-Kronig analyses can be made with better precision than when reflectance data is available only over a limited spectral range. The construction of a homodyning interferometer that is capable of measuring small (diameter approximately 1 cm) samples at millimeter wavelengths and samples that are highly absorbing. To our knowledge no other instruments with this capability exist. The measurement of refractive indices of gypsum, both as a single crystal and as a powder in the far and near infrared for use as a standard. The measurement of several types of graphite. We have found that Dixon 200-10 shows a large positive real part of the dielectric constant at low frequencies. This contradicts the usual free electron picture for graphite at low frequencies. Keywords: Minerals, Metals, Ultraviolet radiation, Infrared radiation, Liquids, Optical properties, Single crystals, Powders. (edc)
Keywords	Minerals Optical properties Dielectric properties Far infrared radiation Free electrons Graphite Gypsum Infrared radiation Interferometers Metals Millimeter waves Near infrared radiation Reflectance Refractive index Single crystals Ultraviolet radiation
Source Agency	Army Non Paid ADAS
NTIS Subject Category	48F - Geology & Geophysics 63C - Infrared & Ultraviolet Detection
Corporate Authors	Missouri Univ.-Rolla.; Chemical Research, Development and Engineering Center, Aberdeen Proging
Document Type	Technical Report
Title Note	Contractor rept. Jun 85-May 87,
NTIS Issue Number	198824
Contract Number	DAAA15-85-K-0004

Optical Constants of Minerals and Other Materials from the Millimeter to the Ultraviolet.

Optical Constants of Minerals and Other Materials from the Millimeter to the Ultraviolet.
ADA197803

Publication Date	1988
Personal Author	Bell, R. J.; Alexander, R. W.; Newquist, L. A.; Van Diver, R.; Ordal, M. A.
Page Count	140
Abstract	The optical constants of a wide variety of materials were measured for this contract period. This report covers the work done at the Univ. of Missouri-Rolla. The spectral range of the measurements covered from the millimeter to the ultraviolet. The millimeter and submillimeter (far infrared) measurements were made on the Rolla Campus and the infrared, visible and ultraviolet measurements were made on the Kansas City Campus. This wide spectral range means that Kramers-Kronig analyses can be made with better precision than when reflectance data is available only over a limited spectral range. The construction of a homodyning interferometer that is capable of measuring small (diameter approximately 1 cm) samples at millimeter wavelengths and samples that are highly absorbing. To our knowledge no other instruments with this capability exist. The measurement of refractive indices of gypsum, both as a single crystal and as a powder in the far and near infrared for use as a standard. The measurement of several types of graphite. We have found that Dixon 200-10 shows a large positive real part of the dielectric constant at low frequencies. This contradicts the usual free electron picture for graphite at low frequencies. Keywords: Minerals, Metals, Ultraviolet radiation, Infrared radiation, Liquids, Optical properties, Single crystals, Powders. (edc)
Keywords	Minerals Optical properties Dielectric properties Far infrared radiation Free electrons Graphite Gypsum Infrared radiation Interferometers Metals Millimeter waves Near infrared radiation Reflectance Refractive index Single crystals Ultraviolet radiation
Source Agency	Army Non Paid ADAS
NTIS Subject Category	48F - Geology & Geophysics 63C - Infrared & Ultraviolet Detection
Corporate Authors	Missouri Univ.-Rolla.; Chemical Research, Development and Engineering Center, Aberdeen Proging
Document Type	Technical Report
Title Note	Contractor rept. Jun 85-May 87,
NTIS Issue Number	198824
Contract Number	DAAA15-85-K-0004