Nested Lighting Device with Dual Concave Reflectors
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Solution Overview
Problem
Conventional lighting devices with multiple light sources experience color unevenness and increased size due to mismatched light beams when the distance between the irradiation surface and light emission components changes, particularly in clinical settings where precise illumination is required.
Innovation Solution
A lighting device configuration featuring a first and second light irradiation unit with differently sized concave reflecting mirrors and light sources, where the second unit is positioned further in the irradiation direction, ensuring the optical axes align, allowing for uniform light blending at the irradiation surface, even when the distance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If units of the same size are stacked in the optical axis direction, then the light beams can be superposed, but the device size is enlarged in the depth direction
Solution Approach 1:
The patent applies nesting by placing the second light irradiation unit inside the optical path of the first light irradiation unit. The second unit is positioned within the cone of light emitted by the first unit, allowing both units to contribute to illumination without requiring sequential stacking along the optical axis. This nested configuration enables light beam superposition while minimizing the device's depth size.
2Adaptability or versatility
If the distance between the irradiation surface and light emission component is changed, then the lighting device can adapt to different working distances, but the light beams from multiple light sources become mismatched causing color unevenness
Solution Approach 1:
The patent applies local quality by assigning different properties to different light irradiation units. Specifically, each unit has light sources and reflecting mirrors with different sizes and optical characteristics. The first unit has larger components while the second unit has smaller components, allowing each unit to maintain optimal beam alignment and color uniformity at different distances from the irradiation surface, thereby enabling adaptability across varying working distances.
3Manufacturing precision
If light sources of different sizes are used to maintain uniform light blending, then color unevenness is suppressed, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the lighting device into multiple independent light irradiation units, each containing its own light source and reflecting mirror assembly. The first light irradiation unit and second light irradiation unit are structurally independent but optically integrated, with each unit contributing differently sized light beams that blend uniformly at the irradiation surface. This segmented approach achieves uniform light blending while maintaining manageable structural complexity through modular design.
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 maintains uniform color and luminance distribution at the irradiation surface, preventing color unevenness and allowing for easy determination of anatomical features like veins or arteries, regardless of the distance to the target, while minimizing the device's depth size.
Implementation Method 1
a first light irradiation unit including a first concave reflecting mirror and a first light source provided within the first concave reflecting mirror; and a second light irradiation unit including a second concave reflecting mirror
Data Source
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AI summary
A lighting device, having: a first light irradiation unit (10) including a first concave reflecting mirror (3) and a first light source (2) provided within the first concave reflecting mirror (3); and a second light irradiation unit (20) that has a second concave reflecting mirror (1) that is smaller than the first concave reflecting mirror (3) and a second light source (12) provided within the second concave reflecting mirror (13), the second light irradiation unit (20) being disposed more to the light irradiation direction side than the first light source (2), and being disposed so that the optical axes of the first concave reflecting mirror (3) and the second concave reflecting mirror (13) are the same.