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Portable product authentication device

  • US 6,707,539 B2
  • Filed: 10/18/2002
  • Issued: 03/16/2004
  • Est. Priority Date: 01/18/1999
  • Status: Expired due to Term
First Claim
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1. A method for determining relatedness of a sample to a standard, comprising:

  • providing a chip, the chip comprising;

    a substrate; and

    a plurality of different light-emissive compounds attached to a surface of the substrate in a manner whereby the light-emissive compounds will interact with the sample, such interaction altering light emission from the light-emissive compounds versus light emission from the light-emissive compounds absent said interaction;

    wherein each of the different light-emissive compounds is attached at a location discrete from attachment of all other of the different light-emissive compounds;

    applying a sample to the surface of the chip;

    irradiating the sample with at least one irradiating wavelengths of light;

    detecting at least one emitted wavelength of light, to establish a sample emission profile;

    providing a standard fingerprint characteristic of a standard; and

    comparing the sample emission profile with the standard fingerprint to determine the relatedness of the sample and the standard.

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