Optical Sensor Non-Parallel Light Irradiation for High Resolution
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Solution Overview
Problem
In living body optical measurement devices, increasing the density of probes to achieve higher resolution compromises their attachment performance to the object under test.
Innovation Solution
An optical sensor system that irradiates non-parallel plural light beams onto the same position of the object under test, using a light source module with a surface emitting laser array chip and a detection module with a division lens to enhance resolution without degrading attachment performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the density of probes is increased to achieve higher resolution, then the measurement precision is improved, but the attachment performance to the object under test is degraded
Solution Approach 1:
The patent divides the light source into multiple independent light emitting sections (first light emitting section, second light emitting section, etc.) that can be controlled separately. Each light emitting section corresponds to a specific measurement position, allowing the system to achieve high resolution by selectively activating only the necessary sections for a given measurement location, thereby maintaining good attachment performance while achieving high measurement precision.
Solution Approach 2:
The patent implements local quality by making each light emitting section and its corresponding detection section have specialized characteristics optimized for their specific positions. The light emitting sections and detection sections are arranged in corresponding relationships where each pair is optimized for measurements at their specific locations, allowing high resolution without requiring all probes to be densely packed, thus maintaining attachment performance.
2Measurement precision
If multiple light beams are irradiated onto the same position to improve resolution, then the measurement precision is improved, but the complexity of the irradiation system is increased
Solution Approach 1:
The patent merges multiple light emitting sections and detection sections into integrated modules that can be controlled as a unified system. The light source module containing multiple light emitting sections and the detection module containing multiple detection sections work together in a coordinated manner, reducing the overall system complexity compared to having completely separate systems for each light beam and detection path.
Solution Approach 2:
The patent creates a universal measurement system where the same light source module and detection module can perform multiple measurement functions by selectively activating different light emitting sections and detection sections. This multi-functionality reduces the need for separate specialized systems for each measurement position, thereby reducing overall device complexity while maintaining high resolution capability.
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
This approach allows for higher resolution measurements without impairing the attachment performance, enabling more accurate detection of light absorption bodies within the object under test.
Implementation Method 1
a light source module having a surface emitting laser array chip and a lens, wherein the lens refracts light from the surface emitting laser array chip
Implementation Method 2
a detection module having a division lens and plural photodiodes, wherein the division lens divides light from the object under test onto the plural photodiodes
Data Source
AI summary
An optical sensor includes an irradiation system including at least one light irradiator to irradiate light onto an object under test; and a detection system detecting the light that is irradiated from the irradiation system and is propagated in the object under test. Further, the light irradiator irradiates non-parallel plural light beams on a same position of the object under test.