Resonant Light Source for Vein Imaging Glare Suppression
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Solution Overview
Problem
Existing imaging apparatuses face challenges in capturing clear images of veins due to glare and shadow issues caused by the arrangement of light source and imaging sections, which complicates the reduction of apparatus size and uniform illumination.
Innovation Solution
The imaging apparatus incorporates a light receiving section with multiple light receiving elements and a light source section featuring a translucent layer, semi-transmissive reflection layers, and a resonant structure, where the first resonant length is greater than the second resonant length to align peak wavelengths for inclined illumination, reducing glare and shadows while maintaining high light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light source section and imaging section are arranged to face each other interposing a subject, then the imaging of veins is achieved, but the apparatus size cannot be reduced
Solution Approach 1:
The light source section and imaging section are merged into a single integrated structure where the light receiving section is arranged on the same side as the light source. The light source includes a light emitting section and a reflection section that shares the same space, eliminating the need for separate opposing sections and reducing overall apparatus volume.
Solution Approach 2:
The patent transitions from a one-dimensional opposing arrangement to a two-dimensional co-planar arrangement. The light source and light receiving section are positioned on the same side of the subject, utilizing lateral spatial distribution rather than front-back positioning, which reduces the depth dimension of the apparatus.
2Use of energy by moving object
If the irradiation light is emitted in a small incident angle with respect to the surface of the subject, then the light efficiency is high, but glare occurs on the surface of the subject
Solution Approach 1:
The light source is designed with different sections having different functions: a light emitting section that emits light at an inclined angle to avoid glare, and a reflection section that reflects light. The light receiving section is positioned to receive light from these different sections, allowing selective optimization of different light paths for different purposes.
Solution Approach 2:
The light source is segmented into multiple functional sections: a light emitting section for generating light and a reflection section for reflecting light. This segmentation allows each section to be optimized independently - the light emitting section can be positioned at an inclined angle to reduce glare while maintaining efficiency, and the reflection section can compensate for directional limitations.
3Object-affected harmful factors
If the irradiation light is emitted in an appropriate incident angle with respect to the surface of the subject, then the glare is suppressed, but shadows are emphasized due to one-directional illumination
Solution Approach 1:
The light source is divided into a light emitting section and a reflection section positioned at different locations and angles. The light emitting section provides inclined illumination to suppress glare, while the reflection section provides additional lighting from a different direction to fill in shadows, achieving multi-directional illumination效果 without requiring the subject to be positioned between opposing light sources.
Solution Approach 2:
The reflection section acts as an intermediary element that redirects light to illuminate shadowed areas. By introducing this intermediate light path, the system achieves uniform illumination that suppresses both glare and shadows, improving image quality without compromising the glare-suppression benefits of inclined illumination.
4Device complexity
If the light source section is arranged on the opposite side of the light receiving section with the subject interposed, then the imaging function is achieved, but the apparatus complexity increases
Solution Approach 1:
The light source and light receiving section are merged into a co-planar arrangement on the same side of the subject. The light source includes both a light emitting section and a reflection section that work together to provide illumination, while the light receiving section captures the reflected light from the subject. This integrated arrangement maintains the imaging function while simplifying the overall structure.
Solution Approach 2:
The patent repositions components from a one-dimensional opposing layout to a two-dimensional co-planar layout. The light source and light receiving section are distributed laterally on the same side, utilizing horizontal spacing rather than vertical separation, which reduces structural complexity while preserving optical path integrity.
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 enables the capture of fine and clear images of veins by suppressing glare and shadows, allowing for a compact apparatus design and uniform illumination.
Implementation Method 1
A resonation structure is formed so that the light emitted from the light emitting layer is resonated between the semi-transmissive reflection layer and the reflection layer
Implementation Method 2
A resonation structure is formed so that the irradiation light from the light emitting layer is resonated between the first semi-transmissive reflection layer and the second semi-transmissive reflection layer
Implementation Method 3
The plurality of the transmissive sections respectively includes a second translucent layer having light permeability
Data Source
AI summary
A light receiving section includes light receiving elements. A light source section includes a light emitting section that illuminates the subject and transmissive sections. The light emitting section is provided with a first translucent layer, which includes a light emitting layer, and a reflection layer and a semi-transmissive reflection layer interposing the first translucent layer, so that a resonance structure is formed. Each of the transmissive sections includes a second translucent layer, and a first semi-transmissive reflection layer and a second semi-transmissive reflection layer, which are opposed each other interposing the second translucent layer, so that a resonance structure that resonates incident light from the subject side is formed. A resonance length between the reflection layer and the semi-transmissive reflection layer in the light emitting section is more than a resonance length between the first semi-transmissive reflection layer and the second semi-transmissive reflection layer in the transmissive section.