Dynamic Wavelength Selection for Optical Sensing
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Solution Overview
Problem
Optical sensing systems face challenges in variable conditions such as ambient light, reflections, and environmental factors like dust, fog, and rain, which affect signal-to-noise ratio and image quality due to limited wavelength sensitivity and adaptability.
Innovation Solution
An optical sensing system with a dual-wavelength illumination system and a photosensor sensitive to ultraviolet and infrared bands, where control circuitry autonomously selects the optimal wavelength based on performance assessment under prevailing conditions to enhance sensitivity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-wavelength photosensor system is used, then the device complexity is low, but the adaptability to variable conditions deteriorates
Solution Approach 1:
The photosensor is designed with broad-spectrum sensitivity covering ultraviolet, visible, and infrared wavelengths, enabling a single device to perform multiple wavelength detection functions. This multi-functional capability allows the system to adapt to various lighting conditions without requiring separate sensors for each wavelength range, thus improving adaptability while controlling device complexity
Solution Approach 2:
The system dynamically selects and activates specific photo emitters based on prevailing conditions such as ambient light levels, reflections, and environmental factors. This dynamic adaptation allows the illumination system to optimize performance for current conditions without requiring a complete redesign of the hardware architecture, balancing adaptability with manageable complexity
2Adaptability or versatility
If multiple wavelengths are used to improve performance under variable conditions, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The illumination system is divided into multiple groups of photo emitters, each targeting specific wavelength ranges (ultraviolet, visible, infrared). This segmentation allows independent control and selection of appropriate wavelength groups based on conditions, improving adaptability while maintaining manageable device complexity through modular organization
Solution Approach 2:
The system changes operational parameters by selectively activating different photo emitters and adjusting illumination wavelengths based on assessed conditions. This parameter-based adaptation allows the system to optimize performance for varying environments without requiring fundamentally different hardware configurations, thus improving adaptability while controlling complexity
3Productivity
If autonomous wavelength selection is implemented, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The control circuitry autonomously assesses prevailing conditions and selects optimal wavelengths without requiring external intervention or complex user interfaces. This self-service capability improves operational efficiency by automatically adapting to conditions, while the decision-making logic is integrated into the control circuitry to minimize additional complexity
Solution Approach 2:
The system incorporates feedback mechanisms where the control circuitry continuously monitors performance metrics and environmental conditions, then adjusts wavelength selection accordingly. This feedback loop enables autonomous optimization of operational efficiency while maintaining manageable complexity through integrated control logic that processes sensor data and makes real-time adjustments
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
The system improves sensitivity and precision by adaptively selecting the best wavelength for the current conditions, effectively mitigating the impact of variable conditions on image quality and signal strength.
Implementation Method 1
Optical sensing using photosensors (e.g., photoelectric, CMOS, CCD, photoresistive, LED, etc.) is used in a wide variety of devices
Implementation Method 2
an illumination system having a plurality of photo emitters... a first group of at least one photo emitter selectively operative to emit light at a first wavelength
Data Source
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Figure 2A~2B
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AI summary
In an optical sensing system, illumination light is selectively emitted by an illumination system at a selected wavelength from among a set of available wavelengths including a first wavelength, and a second wavelength that is different from the first wavelength, to illuminate a target area. The portion of the emitted light that is reflected from the target area is received by a photosensor that is sensitive in a range that includes the first wavelength and the second wavelength. A preferred at least one wavelength of the selective light emission is autonomously selected from among the first wavelength and the second wavelength based on assessed comparative performance of the photosensor in conjunction with the emitted light of the first wavelength and of the second wavelength in currently prevailing conditions.