Standoff spectroscopy using a conditioned target
First Claim
Patent Images
1. A system for standoff spectroscopy to analyze a residue comprising:
- a target surface for spectral analysis;
an infrared (“
IR”
) source that irradiates the target surface with IR radiation;
a detector that measures a spectrum from the target surface based on the IR radiation;
an ultraviolet (“
UV”
) source that irradiates the target surface with UV radiation, wherein the detector measures a first and second spectrum of the target surface away from the target surface based on radiation from the infrared source, wherein the second spectrum is measured by the detector after the ultraviolet source irradiates the target surface; and
a processor coupled with the detector and configured to perform the spectral analysis by comparing the first and second spectrum, wherein the spectral analysis determines whether the residue is present on the target surface based on the comparison of the first and second spectrum.
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Abstract
A system and method are disclosed for standoff spectroscopy of molecules (e.g. from a residue) on a surface from a distance. A source emits radiation that modifies or conditions the residue, such as through photodecomposition. A spectral generating source measures a spectrum of the residue before and after the residue is exposed to the radiation from that source. The two spectra are compared to produce a distinct identification of the residues on the surface or identify certain properties of the residue.
60 Citations
20 Claims
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1. A system for standoff spectroscopy to analyze a residue comprising:
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a target surface for spectral analysis; an infrared (“
IR”
) source that irradiates the target surface with IR radiation;a detector that measures a spectrum from the target surface based on the IR radiation; an ultraviolet (“
UV”
) source that irradiates the target surface with UV radiation, wherein the detector measures a first and second spectrum of the target surface away from the target surface based on radiation from the infrared source, wherein the second spectrum is measured by the detector after the ultraviolet source irradiates the target surface; anda processor coupled with the detector and configured to perform the spectral analysis by comparing the first and second spectrum, wherein the spectral analysis determines whether the residue is present on the target surface based on the comparison of the first and second spectrum. - View Dependent Claims (2, 3)
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4. A method for identifying a residue on a surface with standoff spectroscopy comprising:
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detecting a first spectral measurement at the surface; irradiating the surface with conditioning radiation at a predetermined frequency for causing a reaction with the residue on the surface; detecting a second spectral measurement at the surface after the surface has received the conditioning radiation; and comparing the second spectral measurement with the first spectral measurement to determine a presence of the residue by identifying wavelengths at which the conditioning radiation reacts with the residue. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for standoff spectroscopy of a residue comprising:
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a spectral generating source configured to emit a first type of radiation; a target comprising the residue on a surface of the target; a conditioning source configured to emit a second type of radiation to react with the residue on the surface, wherein the reaction modifies a spectrum of the residue on the surface; a detector configured to measure a first spectrum from the spectral generating source and to measure a second spectrum from the spectral generating source, wherein the second spectrum is measured after the conditioning source after the reaction with the emitted second type of radiation; and a processor configured to identify the residue by comparing the second spectrum with the first spectrum. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification