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Compound optical probe employing single optical waveguide

  • US 5,119,463 A
  • Filed: 04/09/1991
  • Issued: 06/02/1992
  • Est. Priority Date: 04/09/1991
  • Status: Expired due to Term
First Claim
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1. A compound probe sensor for monitoring a plurality of chemical parameters, the probe comprising:

  • an optical waveguide having a longitudinal axis along which light signals propagate bidirectionally;

    a first optical sensor attached to a distal end of the optical waveguide, said first sensor comprising a first analyte indicator, light signals of a first wavelength being absorbed by the first analyte indicator to an extent dependent upon the amount of a first analyte present;

    a second optical sensor comprising a polymer matrix material in which a second analyte indicator is provided, said polymer matrix material being disposed around the distal end of the optical waveguide and the first optical sensor, light signals of a second wavelength transmitted to the distal end of the optical waveguide exciting the second analyte indicator to emit light, a decay time of the light emission varying in response to a concentration of a second analyte present; and

    a third optical sensor positioned adjacent to the distal end of the optical waveguide, said third optical sensor comprising a third analyte indicator, light signals at a third wavelength being absorbed by the third analyte indicator to an extent dependent upon the amount of a third analyte present.

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