Security Screening Using Raman Analysis
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Accused Products
Abstract
Method and apparatus for screening objects using Raman scattering methods to detect the presence of predefined substances or classes of substances. The predefined substances may be hazardous, toxic, or explosive. Radiation is supplied to an incident region of an object. Scattered light is collected from a collection region on the surface of the object spaced from the incident region. The characteristics of the scattered light include Raman features related to the predefined substances. The Raman features allow the presence, or not, of the predefined substances to be determined.
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Citations
64 Claims
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1-32. -32. (canceled)
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33. A method of screening an object to identify the presence or otherwise of one or more predefined substances or classes of substances, the method comprising the steps of:
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supplying incident radiation to an incident region on a surface of said object; detecting Raman scattered light from a collection region on a surface of said object, the collection region being spaced from the incident region; comparing the Raman scattered light to information related to said predefined substances or classes of substances; and determining the presence or otherwise of said one or more predefined substances or classes of substances in said object. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. Screening apparatus for identifying the presence or otherwise of predefined substances or classes of substances in an object, the apparatus comprising:
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illumination optics arranged to direct incident radiation at an incident region on the surface of said object; collection means for collecting Raman scattered light from a collection region on the surface of said object, the collection region being spaced from the incident region; a comparator for comparing the Raman scattered light to information related to said predefined substances or classes of substances; and an analyser for determining the presence or otherwise of said one or more predefined substances or classes of substances in said object. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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63. A method of screening an object to identify the presence or otherwise of one or more predefined substances or classes of substances, the method substantially as herein described with reference to the accompanying drawings.
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64. Screening apparatus for identifying the presence or otherwise of predefined substances or classes of substances in an object, the apparatus substantially as herein described with reference to the accompanying drawings.
Specification