Simple sugar concentration sensor and method
First Claim
1. A noninvasive system for measuring glucose, the system comprising:
- a light source for emitting light 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 from the light source and for providing a first polarized light;
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 to provide a second polarized light;
a first detector positioned in a manner to detect at least some or all of the first polarized light; and
a second detector positioned in a manner to detect at least some or all of the second polarized light;
one or more of the first detector and the second detector being so adjusted, the adjusting comprising at least one of increasing, decreasing, and comparing, a first output of the first detector and a second output of 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.
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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.
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Citations
30 Claims
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1. A noninvasive system for measuring glucose, the system comprising:
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a light source for emitting light 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 from the light source and for providing a first polarized light; 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 to provide a second polarized light; a first detector positioned in a manner to detect at least some or all of the first polarized light; and a second detector positioned in a manner to detect at least some or all of the second polarized light; one or more of the first detector and the second detector being so adjusted, the adjusting comprising at least one of increasing, decreasing, and comparing, a first output of the first detector and a second output of 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 (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for measuring glucose, the method comprising:
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positioning a light source of light capable of penetrating body tissue proximate to a first polarizer in a manner that light emitting from the light source is provided to the first polarizer, and the first polarizer provides a first polarized light; positioning a first detector apart from the first polarizer in a manner to receive a portion of the first polarized light, the first detector providing a first output; positioning a second polarizer apart from the first polarizer in a manner to receive at least a portion of the first polarized light provided by the first polarizer, the second polarizer providing a second polarized light; positioning a second detector proximate to the second polarizer, and in a manner to receive all or a portion of the second polarized light provided by the second polarizer, the second detector providing a second output; and 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, the adjusting comprising at least one of increasing, decreasing, and comparing, the first output of the first detector and the second output of the second detector. - View Dependent Claims (20, 21, 22, 23)
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24. A noninvasive system for measuring glucose, the system comprising:
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a light source for emitting light; a first polarizer for receiving light emitted from the light source; a second polarizer for receiving light emitted from the light source; a first detector positioned in a manner to detect polarized light from the first polarizer; and a second detector positioned in a manner to detect polarized light from the second polarizer, a feedback circuit connecting the light source and the first detector and configured to adjust the intensity of the light capable of penetrating body tissue 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 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 (25, 26, 27)
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28. A method for measuring glucose, the method comprising:
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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 polarized light provided by the first polarizer, the first detector providing a first output; positioning a second detector to receive 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, the adjusting comprising at least one of increasing, decreasing, and comparing, the first output of the first detector and the second output of the second detector. - View Dependent Claims (29, 30)
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Specification