NON-INVASIVE IN SITU GLUCOSE LEVEL SENSING USING ELECTROMAGNETIC RADIATION
First Claim
1. An apparatus comprising:
- a positioning assembly configured to detect a position of an eyeball of a subject in proximity therewith;
a transmitting assembly configured to generate an incident beam of electromagnetic waves;
a receiving assembly configured to detect a reflected beam of electromagnetic waves produced by said incident beam reflected from a surface of said eyeball; and
processing logic coupled to said transmitting assembly and said receiving assembly and configured to determine a glucose level in said subject based on characteristics of said incident beam and said reflected beam.
2 Assignments
0 Petitions
Accused Products
Abstract
System and method of using electromagnetic radiation signals to non-invasively test a glucose level in a subject. During operation, an incident beam of Terahertz waves is generated and projected onto the surface of the eyeball, which is naturally reflected by a tear layer. The reflected Terahertz waves are detected and characterized to determine the reflection characteristics of the tear layer, e.g., an axial ratio of reflection coefficients in two polarization orientations. Provided with the determined axial ratio and according to a predetermined correlation among axial ratio, tear glucose level and blood glucose level, the current blood glucose level in the subject can be derived and presented to a user.
15 Citations
20 Claims
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1. An apparatus comprising:
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a positioning assembly configured to detect a position of an eyeball of a subject in proximity therewith; a transmitting assembly configured to generate an incident beam of electromagnetic waves; a receiving assembly configured to detect a reflected beam of electromagnetic waves produced by said incident beam reflected from a surface of said eyeball; and processing logic coupled to said transmitting assembly and said receiving assembly and configured to determine a glucose level in said subject based on characteristics of said incident beam and said reflected beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A portable device for sensing glucose levels, said portable device comprising:
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a transmitting assembly configured to generate first electromagnetic waves; a receiving assembly configured to detected second electromagnetic waves produced by said first electromagnetic waves reflected from a tear layer covering an eyeball of a subject proximate to said portable device; processing logic coupled to said transmitting assembly and said receiving assembly and configured to; determine reflection characteristics of said tear layer with respect to said first electromagnetic waves; and automatically determine a glucose level in said subject based on said reflection characteristics, and a housing enclosing said transmitting assembly, said receiving assembly and said processing logic. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a generator configured to generate incident Terahertz waves at a first location; a detector configured to detect reflected Terahertz waves at a second location, wherein said reflected Terahertz waves are produced by said incident Terahertz waves being reflected from a tear layer covering an eyeball of a subject; processor coupled to said generator and said detector; and memory coupled to said processor and comprising instructions that, when executed by said processor, perform a method of; automatically determining reflection characteristics of said tear layer with respect to said incident Terahertz waves; and determining a glucose level in said subject based on said reflection characteristics according to a predetermine correlation between said reflection characteristics and a tear glucose level. - View Dependent Claims (18, 19, 20)
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Specification