SWIR targeted agile raman system for detection of unknown materials using dual polarization
First Claim
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1. A system comprising:
- a first subsystem comprising;
a first collection optics configured to collect a first plurality of interacted photons having optical components in a plurality of polarization alignments from a first location comprising an unknown material;
a polarization assembly configured to receive the first plurality of interacted photons and separate the first plurality of interacted photons into a first optical component with a first polarization alignment and a second optical component with a second polarization alignment;
a first optical filter configured to receive at least a portion of the first optical component and generate a first filtered component having a first wavelength;
a second optical filter configured to receive at least a portion of the second optical component and generate a second filtered component having a second wavelength; and
at least one SWIR detector configured to detect one or more of the first filtered component and the second filtered component and generate at least one SWIR data set; and
a second subsystem comprising;
an illumination source configured to illuminate a second location comprising the unknown material and generate a second plurality of interacted photons,a second collection optics configured to collect the second plurality of interacted photons;
a fiber array spectral translator device having a two-dimensional array of optical fibers drawn into a one-dimensional fiber stack, wherein the fiber array spectral translator device is configured to convert a two-dimensional field of view into a curvilinear field of view;
a spectrometer comprising an entrance slit coupled to the one-dimensional end of the fiber stack to generate a plurality of spatially resolved Raman spectra; and
a Raman detector coupled to the spectrometer to detect the spatially resolved Raman spectra and generate at least one Raman data set.
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Abstract
The present disclosure provides for a system and method for analyzing a sample comprising at least one unknown material. A first location may be scanned to generate a SWIR hyperspectral image. The SWIR hyperspectral image may be generated using dual polarization techniques. The SWIR hyperspectral image may be analyzed to target a second location comprising the unknown material. This second location may be further analyzed using Raman spectroscopic techniques and a Raman data set may be generated. The Raman data set may be further analyzed to associate the unknown material with a know material.
138 Citations
22 Claims
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1. A system comprising:
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a first subsystem comprising; a first collection optics configured to collect a first plurality of interacted photons having optical components in a plurality of polarization alignments from a first location comprising an unknown material; a polarization assembly configured to receive the first plurality of interacted photons and separate the first plurality of interacted photons into a first optical component with a first polarization alignment and a second optical component with a second polarization alignment; a first optical filter configured to receive at least a portion of the first optical component and generate a first filtered component having a first wavelength; a second optical filter configured to receive at least a portion of the second optical component and generate a second filtered component having a second wavelength; and at least one SWIR detector configured to detect one or more of the first filtered component and the second filtered component and generate at least one SWIR data set; and a second subsystem comprising; an illumination source configured to illuminate a second location comprising the unknown material and generate a second plurality of interacted photons, a second collection optics configured to collect the second plurality of interacted photons; a fiber array spectral translator device having a two-dimensional array of optical fibers drawn into a one-dimensional fiber stack, wherein the fiber array spectral translator device is configured to convert a two-dimensional field of view into a curvilinear field of view; a spectrometer comprising an entrance slit coupled to the one-dimensional end of the fiber stack to generate a plurality of spatially resolved Raman spectra; and a Raman detector coupled to the spectrometer to detect the spatially resolved Raman spectra and generate at least one Raman data set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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collecting a first plurality of interacted photons having optical components in a plurality of polarization alignments from a first location comprising an unknown material; separating the first plurality of interacted photons into a first optical component having a first polarization alignment and a second optical component having a second polarization alignment; passing at least a portion of the first optical component through a first optical filter configured to generate a first filtered component having a first wavelength; passing at least a portion of the second optical component through a second optical filter configured to generate a second filtered component having a second wavelength; detecting the first filtered component and the second filtered component to generate at least one SWIR data set; analyzing the at least one SWIR data set to target a second location comprising the unknown material; illuminating the second location to generate a second plurality of interacted photons; passing the second plurality of interacted photons through a fiber array spectral translator device to generate a plurality of spatially resolved Raman spectra; generating at least one Raman data set of the spatially resolved Raman spectra; and analyzing the Raman data set to associate the unknown material with a known material. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification