Multi-segment Optical Component for Signal-to-Noise Ratio
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Solution Overview
Problem
Conventional optical detecting devices using Fresnel lenses struggle to overcome noise interference from epidermal scattering signals, which decreases detection accuracy when external objects do not directly contact the device's effective region.
Innovation Solution
A multi-segment optical component with a central lens portion and laterally disposed isolating and collecting lens portions, where the curvature radii and centers of these portions differ from the central lens, is used to isolate epidermal scattering signals and enhance the collection of dermis and vessel scattering signals, thereby increasing the signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional Fresnel lens is used to increase the quantity of optical detecting signal, then the signal quantity is improved, but the epidermal scattering signal noise cannot be eliminated, decreasing detection accuracy
Solution Approach 1:
The optical component is divided into multiple independent lens portions (central lens portion, first lateral lens portions, second lateral lens portions) with different curvature radii. Each portion independently processes light from different regions, enabling selective collection of useful signals while blocking noise from the epidermal layer.
Solution Approach 2:
Different lens portions are assigned different curvature radii tailored to their specific functions: the central lens portion has a first curvature radius optimized for direct signal collection, while the lateral lens portions have a second curvature radius optimized for isolating epidermal scattering. This local differentiation enables simultaneous signal enhancement and noise rejection.
2Object-affected harmful factors
If the curvature radius of lateral lens portions is made different from the central lens portion to isolate epidermal scattering, then noise isolation is improved, but the structural complexity increases
Solution Approach 1:
The optical component is segmented into distinct functional zones (central and lateral lens portions) with different curvature radii. This segmentation enables independent optimization of each zone for its specific purpose: the central zone for signal collection and the lateral zones for noise isolation, achieving effective epidermal scattering rejection.
Solution Approach 2:
The optical component performs multiple functions simultaneously through its multi-segment structure: it collects optical signals from the dermis and vessel layers while concurrently isolating epidermal scattering noise. The different curvature radii enable the same component to fulfill both signal collection and noise rejection functions without requiring separate devices.
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 configuration effectively prevents epidermal scattering interference and improves the acquisition of accurate vessel and dermis information, enhancing the signal-to-noise ratio and allowing for precise detection even without direct contact with the external object.
Implementation Method 1
The multi-segment optical component includes a base, a central lens portion, a first isolating lens portion and a first collecting lens portion... adapted to condense the optical detecting signal
Implementation Method 2
The optical detecting component receives an epidermal scattering signal S1, a dermis scattering signal S2 and a vessel scattering signal S3
Data Source
AI summary
A multi-segment optical component applied to increase signal-to-noise ratio includes a base, a central lens portion, an isolating lens portion and a collecting lens portion. The central lens portion is disposed on center of the base. The isolating lens portion is disposed by a side of the central lens portion, and the collecting lens portion is disposed by the other side of the central lens portion opposite to the isolating lens portion. At least one of the isolating lens portion and the collecting lens portion has a curvature radius different from a curvature radius of the central lens portion, and the curvature radius of the isolating lens portion can be similar to or different from the curvature radius of the collecting lens portion. The central lens portion has a central axle which does not overlap a curvature center of one of the isolating lens portion and the collecting lens portion.