Simple sugar concentration sensor and method
First Claim
1. A noninvasive system for measuring glucose, the system comprising:
- a light source;
a first polarizer illuminated by the light source and providing a first polarized light;
a second polarizer illuminated by the light source and spaced apart from the first polarizer and providing a second polarized light;
a first detector positioned to detect at least some or all of the first polarized light; and
a second detector positioned to detect at least some or all of the second polarized light;
one or more of the first detector and the second detector configured to determine a relative intensity of the first polarized light relative to the second polarized light or the second polarized light relative to the first polarized light.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
29 Claims
-
1. A noninvasive system for measuring glucose, the system comprising:
-
a light source; a first polarizer illuminated by the light source and providing a first polarized light; a second polarizer illuminated by the light source and spaced apart from the first polarizer and providing a second polarized light; a first detector positioned to detect at least some or all of the first polarized light; and a second detector positioned to detect at least some or all of the second polarized light; one or more of the first detector and the second detector configured to determine a relative intensity of the first polarized light relative to the second polarized light or the second polarized light relative to the first polarized light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for measuring glucose, the method comprising:
-
providing a light source of light; positioning a first polarizer to be illuminated by the light source and to provide a first polarized light; positioning a second polarizer to be illuminated by the light source and spaced apart from the first polarizer and to provide a second polarized light; positioning a first detector to detect at least some or all of the first polarized light, the first detector providing a first output; positioning a second detector to detect at least some or all of the second polarized light, the second detector providing a second output; and configuring one or more of the first detector and the second detector to determine a relative intensity of the first polarized light relative to the second polarized light or the second polarized light relative to the first polarized light. - View Dependent Claims (18, 19, 20, 21, 22)
-
-
23. A noninvasive system for measuring glucose, the system comprising:
-
a light source for emitting light; a first polarizer for receiving emitted light; a second polarizer for receiving emitted light; a first detector positioned to detect first polarized light from the first polarizer; and a second detector positioned to detect second polarized light from the second polarizer; a feedback circuit connecting the light source and the first detector and configured to adjust an intensity of the light to maintain the at least some or all of the first polarized light detected by the first detector within a first portion calibration range; and one or more of the first detector and the second detector being so adjusted that the first polarized light to the first detector is of a similar intensity as that of the second polarized light to the second detector. - View Dependent Claims (24, 25, 26)
-
-
27. A method for measuring glucose, the method comprising:
-
positioning a light source proximate to a first polarizer and a second polarizer in a manner that light emitting from the light source is provided to the first polarizer and the second polarizer; positioning a first detector to receive first polarized light provided by the first polarizer, the first detector providing a first output; positioning a second detector to receive second polarized light provided by the second polarizer, the second detector providing a second output; adjusting one or more of the first detector and the second detector to determine a relative intensity of the first polarized light relative to the second polarized light or the second polarized light relative to the first polarized light. - View Dependent Claims (28, 29)
-
Specification