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Hybrid random bead/chip based microarray

  • US 20040263923A1
  • Filed: 01/22/2004
  • Published: 12/30/2004
  • Est. Priority Date: 01/22/2003
  • Status: Active Grant
First Claim
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1. An optical identification element attached to a chemical, comprising:

  • an optical substrate;

    at least a portion of said substrate having at least one diffraction grating disposed therein, said grating having at least one refractive index pitch superimposed at a common location;

    the grating providing an output optical signal when illuminated by an incident light signal;

    said optical output signal being indicative of a code in said substrate; and

    the chemical being attached to said substrate.

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