Spectro-polarimetric remote surface-orientation measurement
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United States of America Patent
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Jan 13, 2004
Grant Date -
N/A
app pub date -
Mar 13, 2002
filing date -
Mar 20, 2001
priority date (Note) -
Expired
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Abstract
To perform a monocular remote determination of a surface's three-dimensional orientation, an orientation-determination apparatus employs a radiation model in which the assumption is made that light incident upon the surface may be polarized but not elliptically. It makes polarimetric measurements of radiation received from the surface in each of a plurality of wavelength bands in the neighborhood of a known or inferable resonance in the surface's refractive-index spectrum. By employing the model, the apparatus matches the spectrum thus measured with the known behavior, in the neighborhood of a refractive-index resonance, of Fresnel-reflectance spectra as functions of incidence angle. Application-specific information is used to dispel minor ambiguities in the result.
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