Non-invasive analysis system
First Claim
Patent Images
1. A method for non-invasive measurement of an analyte in a target comprising:
- generating a first repetitive discrete coherent optical signal wherein the first repetitive discrete coherent optical signal is generated by a first mode-locked laser;
applying at least part of said optical signal to the target to be analyzed, a portion of which will be scattered by the target;
capturing at least part of said optical signal scattered by the target;
generating a second repetitive discrete coherent optical signal wherein the second repetitive discrete coherent optical signal is a reference optical signal generated by a second mode-locked laser;
combining the captured scattered optical signal with said reference optical signal;
modifying the temporal coherence phase relationship between the captured scattered optical signal and said reference optical signal;
detecting an interference signal between the captured scattered optical signal and said reference optical signal;
analyzing the detected interference signal at multiple temporal relationships; and
determining the analyte measurement.
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Abstract
A non-invasive analysis system suitable for measuring blood glucose concentration includes a broadband set of coherent beams, with relatively low divergence angle, optical source. It further includes an optical processing system which provides a probe and a reference beam, applies the probe beam to the target to be analyzed, recombines the beams interferometrically and varies the relative phase relationships of the two beams. It further includes control and processing systems.
40 Citations
65 Claims
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1. A method for non-invasive measurement of an analyte in a target comprising:
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generating a first repetitive discrete coherent optical signal wherein the first repetitive discrete coherent optical signal is generated by a first mode-locked laser; applying at least part of said optical signal to the target to be analyzed, a portion of which will be scattered by the target; capturing at least part of said optical signal scattered by the target; generating a second repetitive discrete coherent optical signal wherein the second repetitive discrete coherent optical signal is a reference optical signal generated by a second mode-locked laser; combining the captured scattered optical signal with said reference optical signal; modifying the temporal coherence phase relationship between the captured scattered optical signal and said reference optical signal; detecting an interference signal between the captured scattered optical signal and said reference optical signal; analyzing the detected interference signal at multiple temporal relationships; and determining the analyte measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A system for non-invasive measurement of a characteristic of a target comprising:
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a first mode locked laser operable to generate a first repetitive discrete coherent optical signal; a lens operable to apply at least part of said optical signal to the target to be analyzed, a portion of which will be scattered by the target and to capture at least part of said optical signal scattered by the target; a second mode locked laser operable to generate a second repetitive discrete coherent optical signal wherein the second repetitive discrete coherent optical signal is a reference optical signal; a beam splitter operable to combine the captured scattered optical signal with said reference optical signal; an electronic module operable to modify the temporal coherence phase relationship between the captured scattered optical signal and said reference optical signal; a detector operable to detect an interference signal between the captured scattered signal and said reference optical signal; an electronic processing module operable to analyze the detected interference signal at multiple temporal relationships and operable to determine the measurement of the characteristic.
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34. An apparatus for non-invasively measuring of an analyte in a target comprising:
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means for generating a first repetitive discrete coherent optical signal wherein the first repetitive discrete coherent optical signal is generated by a first mode locked laser; means for applying at least part of said optical signal to the target to be analyzed, a portion of which will be scattered by the target; means for capturing at least part of said optical signal scattered by the target; means for generating a second repetitive discrete coherent optical signal wherein the second repetitive discrete coherent optical signal is a reference optical signal generated by a second mode locked laser; means for combining the captured scattered optical signal with said reference optical signal; means for modifying the temporal coherence phase relationship between the captured scattered optical signal and said reference optical signal; means for detecting an interference signal between the captured scattered optical signal and said reference optical signal; means for analyzing the detected interference signal at multiple temporal relationships; and means for determining the analyte measurement. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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Specification