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SWIR targeted agile raman system for detection of unknown materials using dual polarization

  • US 9,052,290 B2
  • Filed: 03/15/2013
  • Issued: 06/09/2015
  • Est. Priority Date: 10/15/2012
  • Status: Active Grant
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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