Optical waveguide sensor and method of making same
AssigneeBiomedical Sensors, Ltd.
InventorsDavid R. Markle, Barry C. Crane, Michael P. Irvine
Life of this patent
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Abstract
An optical waveguide sensor for determining an analyte in a medium, which sensor comprises an optical waveguide having a portion to be brought into contact with said medium, said portion having a plurality of cells arranged in an array which substantially covers the cross-sectional area of the waveguide, each of said cells containing an indicator sensitive to said analyte, and a method for the preparation of said sensor.
Claims22
An optical waveguide sensor for determining an analyte in a medium, which sensor comprises an optical waveguide having a portion to be brought into contact with said medium, said portion having a plurality cells arranged in an aray which substantially covers the cross-sectional area containing an indicator sensitive to said analyte.
A method for the preparation of an optical waveguide sensor for determining an analyte in a medium, which comprises selecting a portion of said waveguide, subjecting said portion to means for forming one or more cells within the waveguide, immersing said portion in a medium containing an indicator sensitive to said analyte and evacuating said one or more cells until each of said cells is filled with said indicator.
A method for the preparation of an optical fiber pH sensor which comprises ablating a plurality of holes with an excimer laser to form cells in an array along a portion of an optical fiber, immersing said portion in a gel-forming solution of phenol red indicator and evacuating said cells so that the cells are filled with solution, removing the fiber from the solution and allowing an indicator-containing gel to form in each cell.
Dependencies are inferred from the claim text.