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Optical sensors for the measurement of oxygen

  • US 5,681,532 A
  • Filed: 05/24/1995
  • Issued: 10/28/1997
  • Est. Priority Date: 09/13/1993
  • Status: Expired due to Fees
First Claim
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1. An optical sensor for measuring oxygen in a fluid sample, comprising an optical waveguide having a distal end portion for contacting the fluid, and a proximal end portion for communication with means for receiving a signal from the distal end portion, and wherein the distal end portion has an oxygen sensor means comprisinga cross-linked oxygen-permeable membrane of a cured perfluorinated urethane polymer and, incorporated therein, an indicator composition comprising an oxygen indicator and a reference dye, wherein the oxygen indicator provides for an oxygen-sensitive fluorescence emission signal, and wherein the reference dye provides for an oxygen-insensitive fluorescence emission signal.

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