Simple sugar concentration sensor and method

摘要

A glucose sensor comprising an optical energy source having an emitter with an emission pattern; a first polarizer intersecting the emission pattern; a second polarizer spaced a distance from the first polarizer and intersecting the emission pattern, the second polarizer rotated relative to the first polarizer by a first rotational amount Θ; a first optical detector intersecting the emission pattern; a second optical detector positioned proximal to the second polarizer, the first polarizer and the second polarizer being positioned between the optical energy source and the second optical detector, the second optical detector intersecting the emission pattern; a compensating circuit coupled to the second optical detector; and a subtractor circuit coupled to the compensating circuit and the first optical detector.

主权项

1. A system for measuring a change in polarization of energy across a fluid, the system comprising:
a single source for emitting energy; a first polarizer for polarizing the energy emitted from the source to provide a first polarized energy; a second polarizer for polarizing at least a portion of the first polarized energy and to provide a second polarized energy, wherein the second polarizer is rotated by a rotational amount with respect to the first polarizer; a first detector for detecting the first polarized energy received a distance away from the first polarizer; a second detector for detecting the second polarized energy; and a module coupled with the first detector and the second detector, the module comprising a first unit for receiving output from the first detector and a second unit for receiving output from the second detector, the module comparing the first and second outputs.