Optical waveguide sensor, device, system and method for glucose measurement
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Abstract
An optical waveguide sensor for glucose measurement comprises a substrate, a first optical waveguide layer formed on a surface of the substrate, an entrance grating and an exit grating which are formed contacting with the first optical waveguide layer and being spaced from each other, a second optical waveguide layer located between the entrance grating and the exit grating while being in contact with the first optical waveguide layer, the second optical waveguide layer having a higher refractive index than that of the first optical waveguide layer, and a functioning layer containing an enzyme and a coloring reagent which is formed on the second optical waveguide layer.
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Citations
28 Claims
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1-20. -20. (canceled)
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21. A method for glucose measurement, comprising:
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extracting a body fluid from an analyte to a functioning layer by generating an electric field between the analyte and the functioning layer;
causing a coloring reaction on the functioning layer by a glucose of the body fluid;
directing an irradiating light toward an optical waveguide layer contacting to the functioning layer by the coloring reaction; and
measuring the quantity of an emitted light from the optical waveguide layer. - View Dependent Claims (22, 23, 24)
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25. A method for glucose measurement, comprising:
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extracting a body fluid from an analyte to a functioning layer by generating an electric field between the analyte and the functioning layer;
causing a coloring reaction on the functioning layer by a glucose of the body fluid;
transmitting a light from beneath one side of the substrate maintaining a predetermined incident angle through a first optical waveguide layer;
transmitting the light through a second optical waveguide layer wherein an intensity of the light transmitted in the second optical waveguide layer changes, due to a change in a color caused by the coloring reaction; and
measuring the change in the intensity of light transmitted in the second optical waveguide layer. - View Dependent Claims (26, 27, 28)
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Specification