Ubiquitous transmissive raman spectroscopy for stand-off detection
First Claim
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1. A substance analysis system disposable a variable stand-off distance from a substance in situ, the system comprising:
- an emitter disposed to emit radiation onto a first region of the substance in a container in situ; and
a detector disposed the variable stand-off distance from the substance in situ, the detector comprising a receiver defining a substantially collimated collection path over the variable stand-off distance, where the collection path is unfocused on any distinct substance region within the container so that the detector receives radiation from a second region of the substance, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees,wherein the received radiation is representative of the entire substance, andwherein;
the emitter emits radiation into the first region of the substance in the container along an emission direction,the detector receives radiation from the second region of the substance along a radiation collection direction, andthe angular distance between the first region and the second region is defined as an angle between the emission direction and the radiation collection direction.
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Abstract
A substance analysis system and method are provided, the system disposable a variable stand-off distance from a substance in situ, including an emitter disposed to emit radiation onto the substance in situ, and a detector disposed the variable stand-off distance from the substance in situ, the detector comprising a receiver defining a substantially collimated collection path over the variable stand-off distance.
35 Citations
31 Claims
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1. A substance analysis system disposable a variable stand-off distance from a substance in situ, the system comprising:
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an emitter disposed to emit radiation onto a first region of the substance in a container in situ; and a detector disposed the variable stand-off distance from the substance in situ, the detector comprising a receiver defining a substantially collimated collection path over the variable stand-off distance, where the collection path is unfocused on any distinct substance region within the container so that the detector receives radiation from a second region of the substance, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees, wherein the received radiation is representative of the entire substance, and wherein; the emitter emits radiation into the first region of the substance in the container along an emission direction, the detector receives radiation from the second region of the substance along a radiation collection direction, and the angular distance between the first region and the second region is defined as an angle between the emission direction and the radiation collection direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of transmission Raman analysis comprising:
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emitting radiation towards a first wall portion of a container in situ onto a first region of a sample in the container, wherein emitted radiation becomes a diffusive light source within the sample in the container without formation of a distinct substance region; and receiving a transmission Raman signal through a second wall portion of the container, the received signal including Raman radiation reflected from multiple portions of the sample within the container, the received signal including Raman radiation collected from a second region of the sample in the container, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees, wherein the receiver is disposable a stand-off distance from the container in situ, and wherein the Raman signal is received through a collection path that is substantially collimated and unfocused on any distinct substance region within the container, the Raman signal being representative of the sample, and wherein; emitting radiation onto the first region of the sample in the container comprises emitting radiation onto the first region along an emitter initial transmission axis, receiving the Raman radiation collected from the second region of the sample in the container comprises collecting the Raman radiation along the detector collection axis, and the angular distance between the first region and the second region being defined as an angle between the emitter initial transmission axis and the detector collection axis. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of analyzing a substance in a container in situ a variable stand-off distance from a substance analysis system, the container having an interior surface and an exterior surface, the method comprising:
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directing a beam of radiation at the container onto a first region of a sample in the container such that at least a portion of the radiation passes through the container and is scattered in the substance and at least a portion of the scattered radiation reflects off of the interior surface of the container, the radiation in the substance resulting in emission of a Raman signal representative of the entire substance; detecting the Raman signal representative of the entire substance, wherein the emitted Raman signal is collected from a second region of the sample in the container, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees, and the Raman signal is detected through a collection path that is substantially collimated and unfocused on any distinct substance region within the container; and comparing the Raman signal to the radiation of the radiation source, and wherein; directing the beam of radiation onto the first region of a sample in the container comprises emitting the beam of radiation along an emission path having a first direction, collecting the emitted Raman signal from the second region of the sample in the container comprises collecting the emitted Raman signal along the collection path having a second direction and the angular distance between the first region and the second region is defined as an angle between the emission path having the first direction and the collection path having the second direction. - View Dependent Claims (17, 18, 19, 20)
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21. A method of analyzing liquid substances in both generally opaque to visible light containers and generally transparent containers, respectively, using a substance analysis system disposable a variable stand-off distance from the liquid substances in situ, comprising:
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directing a beam of radiation at a first location on a container containing a liquid substance, wherein the beam of radiation is directed into a first region of the liquid substance in the container; directing a detector at a second location on the container, the second location being different from the first location; wherein the beam of radiation and the detector are configured so that radiation from the beam passes through the container and into the substance to produce a transmission Raman signal including Raman radiation from a plurality of locations in the substance so the detector can detect the transmission Raman signal, wherein the transmission Raman signal is collected from a second region of the liquid substance in the container, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees, and wherein the transmission Raman signal is received through a collection path that is substantially collimated and unfocused on any distinct substance region within the container, the transmission Raman signal being indicative of the entire composition of the substance; comparing the transmission Raman signal with the radiation emitted by the emitter; determining based on a library of characteristics of components of interest whether the transmission Raman signal indicates that the substance contains a component of interest; and outputting whether or not the substance contains a component of interest, and wherein; directing the beam of radiation into the first region of the liquid substance in the container comprises directing the beam of radiation along an emission path direction, collecting the transmission Raman signal from the second region of the liquid substance in the container comprises collecting the transmission Raman signal along the collection path direction, and the angular distance between the first region and the second region is defined as an angle between the emission path direction and the collection path direction. - View Dependent Claims (22, 23, 24)
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25. A substance analysis system disposable a variable stand-off distance from a container in situ, the system comprising:
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an emitter configured to emit radiation directed at a first location on the container, at least a portion of the radiation passing through the container and into a substance in the container onto a first region of the substance in the container, with at least a portion of the radiation in the substance being reflected within the container; and a detector with a receiving portion directed at a second location on the container, the detector being configured to receive a transmission Raman signal including Raman radiation from multiple portions of the substance, wherein the transmission Raman signal is collected from a second region of the sample in the container, wherein the second region is larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees, the Raman signal being representative of the entire substance, wherein the Raman signal is received through a collection path that is substantially collimated and unfocused on any distinct substance region within the container, wherein the radiation directed at a first location on the container and the Raman radiation are substantially co-axial, and wherein; an emission path is defined as extending between the emitter and the first region of the substance in the container and along an emitter initial transmission axis, the collection path is defined as extending between the second region and the detector and along a detector collection axis, and the angular distance between the first region and the second region is defined as an angle between the emitter initial transmission axis and the detector collection axis. - View Dependent Claims (26, 27, 28)
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29. A substance analysis system disposable a variable stand-off distance from a container in situ, the system comprising:
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a detector with a receiving portion directed at the container, the detector being configured to receive a reflected radiation signal from multiple portions of a substance in the container, wherein the reflected radiation signal is based on a beam of radiation signal directed onto a first region of a sample within the container, the detector a stand-off distance from the container, where the receiving portion of the detector includes a collection aperture configured to receive a substantially collimated beam of radiation reflected from the substance in the container, wherein the beam of radiation is unfocused on any distinct substance region within the container, and wherein the reflected radiation signal is representative of the entire substance, and wherein the reflected radiation signal is collected from a second region of the sample in the container, the second region being larger than the first region and the angular distance between the first region and the second region is equal to or greater than 90 degrees and less than 180 degrees and wherein; the beam of radiation directed onto the first region of a sample within the container comprises emitting the beam of radiation along an emission path having a first direction, collecting the reflected radiation signal from the second region of the sample in the container comprises collecting the reflected radiation signal along a collection path having a second direction and the angular distance between the first region and the second region is defined as an angle between the emission path having the first direction and the collection path having the second direction. - View Dependent Claims (30, 31)
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Specification