System and method for safer detection of unknown materials using dual polarized hyperspectral imaging and Raman spectroscopy

摘要

A first location comprising an unknown material may be scanned using SWIR hyperspectral imaging in a dual polarization configuration. Surveying may also be applied to thereby determine whether or not a human is present. This surveying may be achieved my assessing LWIR data, data acquired from motion sensors, and combinations thereof. If no human is present, a second location may be interrogated using Raman spectroscopic techniques to thereby obtain a Raman data set representative of the region of interest. This Raman data set may be assessed to associate an unknown material with a known material. This assessment may be achieved by comparing the Raman data set to one or more reference data sets in a reference database, where each reference data set is associated with a known material.

主权项

1. A system comprising:
a first subsystem comprising:
a first collection optics configured to collect a first plurality of interacted photons from a first location comprising at least one unknown material, wherein the first plurality of interacted photons comprise optical components in a plurality of polarization alignments,a first polarization assembly configured to:
receive the first plurality of interacted photons,separate the first plurality of interacted photons into a first optical component and a second optical component, andtransmit the first optical component with a first polarization alignment and the second optical component with a second polarization alignment,a first optical filter configured to receive the second optical component and transmit at least a portion of the second optical component having a first wavelength,a second optical filter configured to receive the second optical component and transmit at least a portion of the second optical component having a second wavelength, at least one short wave infrared detector configured to detect at least one of the first optical component and the second optical component and generate a SWIR data set representative of the first location; a second subsystem comprising:
an illumination source configured to illuminate a second location comprising at least one unknown material to 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, wherein the device further comprises a two-dimensional array of optical fibers drawn into a one-dimensional fiber stack so as to effectively convert a two-dimensional field of view into a curvilinear field of view, and wherein the two dimensional array of optical fibers is configured to receive a plurality of photons and transfer the photons out of the fiber array spectral translator device,a spectrometer comprising an entrance slit coupled to the one-dimensional end of the fiber stack, wherein the spectrometer is configured to generate a plurality of Raman spectra, anda Raman detector configured to detect the photons from the spectrometer and generate a Raman data set representative of the second location; a third subsystem comprising:
a third collection optics configured to collect a third plurality of interacted photons from a third location,a long wave infrared detector configured to detect the third plurality of interacted photons and generate a LWIR data set representative of the third location.