Spatial heterodyne integrated computational element (SH-ICE) spectrometer
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United States of America Patent
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Jan 5, 2016
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Sep 3, 2015
app pub date -
Sep 13, 2012
filing date -
Sep 13, 2012
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Abstract
A spatial heterodyne spectrometer may employ an integrated computational element (ICE) to obtain a measure of one or more fluid properties without requiring any moving parts, making it particularly suitable for use in a downhole environment. One illustrative method embodiment includes: directing light from a light source to illuminate a sample; transforming light from the sample into spatial fringe patterns using a dispersive two-beam interferometer; adjusting a spectral weighting of the spatial fringe patterns using an integrated computation element (ICE); focusing spectral-weight-adjusted spatial fringe patterns into combined fringe intensities; detecting the combined fringe intensities; and deriving at least one property of the sample.
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