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DOUBLY-DIFFERENTIAL INTERFEROMETER AND METHOD FOR EVANESCENT WAVE SURFACE DETECTION

  • US 20020003627A1
  • Filed: 02/09/2001
  • Published: 01/10/2002
  • Est. Priority Date: 03/13/2000
  • Status: Active Grant
First Claim
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1. An optical sensing platform for detecting and/or measuring the amount of a substance in a sample using an interferometric surface detection technique, the platform comprising:

  • at least one pair of optical channels, comprising;

    a first optical channel having an upper measurement surface for contact with the sample, and a second optical channel having an upper surface for contact with a reference sample;

    a light source for introducing optical beams into the at least one pair of optical channels;

    a light modulator; and

    a phase detector for detecting optical phase differences between the respective optical beams from the at least one pair of first and second optical channels.

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