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Wavelength selectivity enabling subject monitoring outside the subject's field of view

  • US 7,091,867 B2
  • Filed: 02/20/2004
  • Issued: 08/15/2006
  • Est. Priority Date: 02/20/2004
  • Status: Active Grant
First Claim
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1. A system for enabling automatic determinations of information regarding a person engaging in a business transaction comprising:

  • an optical member positioned between an intended location of a viewer and an environment of interest to said viewer, said viewer being said person engaging in said business transaction and said environment of interest including an anticipated location of a second person engaging in said business transaction, said optical member being a divider that is fixed in position relative to said environment of interest, wherein a visible light path from said viewer to objects in said environment has a substantially unitary magnification, at least a portion of said optical member being wavelength-selective with respect to reflectivity characteristics, such that said optical member is generally transmissive with respect to visible light and is substantially reflective with respect to a particular detection wavelength;

    a detector for receiving light of said detection wavelength reflected by said optical member from said viewer within said intended location, said detector having a detector output that is responsive to said received light; and

    a processor connected to said detector for processing said detector output, wherein optical properties along said visible light path from said viewer to said objects remain independent of said processing, said processor being configured to identify information regarding said viewer.

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