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 noninvasive system for measuring glucose, the system comprising:
a light source emitting light in one of a red wavelength, near infrared wavelength, and an infrared wavelength, the light being capable of penetrating body tissue; a first polarizer proximal to the light source for receiving all or at least a portion of the light emitted directly from the light source; a second polarizer spaced apart from the first polarizer and positioned in a manner to receive polarized light provided by the first polarizer after the all or at least a portion of the light passes through the first polarizer, such that the second polarizer provides a second polarized light; a first detector positioned in a manner to detect at least some or all of the polarized light, in which the polarized light is polarized only from the first polarizer; and a second detector positioned in a manner to detect at least some or all of the second polarized light, in which the second polarized light is provided by a first polarization with the first polarizer followed by a subsequent polarization with the second polarizer; the first detector being position proximal to the second detector, and one or more of the first detector and the second detector being so adjusted that the polarized light to the first detector is of a similar intensity as that of the second polarized light to the second detector.