Security screening using raman analysis

  • US 7,911,604 B2
  • Filed: 11/27/2006
  • Issued: 03/22/2011
  • Est. Priority Date: 04/05/2006
  • Status: Active Grant
First Claim
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1. A method of screening an object to identify the presence or absence of one or more predefined substances or classes of substances, the method comprising the steps of:

  • 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 absence of said one or more predefined substances or classes of substances in said object.

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