Circular Polarization Detection for Non-Invasive Glucose Sensing
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Solution Overview
Problem
Traditional detection devices for biological analysis often require intrusion into living organisms, causing discomfort and suffer from weak sensing signals leading to large errors.
Innovation Solution
A detection device utilizing two photoelectric conversion elements to collect different circularly polarized light, enhanced with filters and light-condensing structures, allowing for non-invasive glucose sensing and tumor imaging through tissue slices or endoscopes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection devices are used for biological analysis, then detection function is provided, but intrusion into living organisms is required causing discomfort and sensing signals are weak leading to large errors
Solution Approach 1:
The patent replaces traditional mechanical/intrusive detection methods with optical detection using circularly polarized light. The system uses light sources and photoelectric conversion elements to detect biological samples non-invasively, substituting physical intrusion with optical field interaction that causes no discomfort to the subject.
Solution Approach 2:
The patent utilizes changes in polarization state of light as it interacts with biological samples. By detecting the rotation of circularly polarized light caused by optically active substances in the sample, the system achieves precise measurement without intrusion. The polarization parameter change serves as the detection mechanism.
2Measurement precision
If traditional detection devices are used, then detection function is provided, but sensing signals are weak resulting in large measurement errors
Solution Approach 1:
The patent employs two distinct photoelectric conversion elements with different polarization sensitivity characteristics. One element detects light with original circular polarization while the other detects orthogonally polarized light. This local differentiation in detection capability allows for robust signal extraction and error reduction through comparison.
Solution Approach 2:
The system uses feedback by comparing signals from two photoelectric conversion elements. The differential measurement approach provides self-validation, where the ratio or difference between the two signals serves as a reference to eliminate common-mode errors and enhance measurement reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances detection capabilities by collecting and analyzing backscattering light, providing accurate glucose concentration measurements and tumor imaging without invasive procedures.
Implementation Method 1
a first photoelectric conversion element and a second photoelectric conversion element... The first photoelectric conversion element collects light with the same polarization direction as the first circularly polarized light
Implementation Method 2
The second photoelectric conversion element collects light with opposite polarization direction to the first circularly polarized light
Implementation Method 3
a first filter disposed above the first photoelectric conversion element and a second filter disposed above the second photoelectric conversion element
Data Source
AI summary
A detection device is provided. The detection device includes a substrate having a first photoelectric conversion element and a second photoelectric conversion element. The detection device also includes a first filter disposed above the first photoelectric conversion element and a second filter disposed above the second photoelectric conversion element. The first photoelectric conversion element collects light with the same polarization direction as the first circularly polarized light, and the second photoelectric conversion element collects light with opposite polarization direction to the first circularly polarized light.