Flush Lighting Reflector with Parallel Segment for Even Illumination
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Solution Overview
Problem
Lighting devices with adjustable or inclined light sources experience significant irregularities in light distribution due to uneven reflections, leading to streaks and spots on illuminated surfaces, particularly when the light source orientation varies with respect to the reflector's axis of symmetry.
Innovation Solution
A rotationally symmetrical reflector with a circular segment-shaped additional reflective element, positioned parallel to the larger opening and closer to the entrance, helps redirect light flux to prevent reflections outside the main emission cone, ensuring even light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light source is inclined with respect to the axis of symmetry of the reflector, then the lighting device can be adjusted to different orientations, but light distribution uniformity deteriorates due to reflections causing streaks and spots
Solution Approach 1:
The reflector surface is divided into multiple zones with different geometric characteristics. The upper part has a specific curvature radius while the lower part has a different curvature radius, allowing each zone to control light reflections differently. This segmentation enables the reflector to maintain uniform light distribution even when the light source is inclined, as each zone can be optimized to prevent streaks and spots in its respective region.
2Illumination intensity
If the reflector surface is modified to correct lighting unevenness, then light distribution uniformity improves, but the reflector design complexity increases
Solution Approach 1:
Different portions of the reflector surface are given different geometric properties. Specifically, the upper part has a first curvature radius while the lower part has a second curvature radius. This local differentiation allows each region to perform its specific function in controlling light reflections, achieving uniform light distribution without requiring a completely complex redesign of the entire reflector system.
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 solution effectively eliminates undesired light spots and unevenness by optimizing light reflection within the main emission cone, maintaining uniformity even when the lighting assembly is inclined.
Implementation Method 1
The part of the emission of the light source which incides on the surface is reflected according to the local inclination of the reflector portion struck by the incident light rays, in accordance with Euclid's' rules according to which the incidence angle is equal to the reflection angle.
Data Source
Figure 1a~1c
Figure 2
AI summary
A reflector (13) for flush installed lighting devices, adapted to eliminate possible undesired spots of light and unevenness of the produced light beam, said reflector being provided with a further reflective element (14), arranged on the surface of said reflector (13) and essentially parallel to the lying plane of the greater opening of said reflector. Said further reflective element will preferably have a circular segment shape and dimensions which may vary according to the dimensions of said reflector and according to the inclination that the lighting assembly may assume with respect to the main body of the flush installed lighting device.