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Fluorescent optical sensor

  • US 5,517,313 A
  • Filed: 02/21/1995
  • Issued: 05/14/1996
  • Est. Priority Date: 02/21/1995
  • Status: Expired due to Term
First Claim
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1. A fluorescence sensor for sensing an analyte comprising:

  • photodetector means for generating an electric signal as a result of being exposed to incident light;

    indicator means for providing a fluorescent emission as a result of excitation light, said indicator means comprising a material permitting said analyte to diffuse therein and having light emitting indicator molecules specific to said analyte to cause said indicator molecules to interact with said analyte to alter the amount of light incident upon said photodetector means from light emitted from said indicator molecules;

    light emitting means for emitting excitation light having at least a portion thereof located within said indicator means;

    said photodetector means having a primary axis of light detection and said light emitting means having a primary axis of light emission, said photodetector means and said light emitting means being located to cause the primary axis of light emission from said light emitting means to be substantially perpendicular to the primary axis of light detection of said photodetector means;

    said photodetector means, said indicator means and said light emitting means being located in one unitary structure.

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