Optical Shield for Narrow Beam LED Fixtures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light fixture assemblies, particularly those using LEDs, face challenges in effectively focusing and directing emitted light to a desired area, leading to inefficient light distribution and beam control.
Innovation Solution
A light fixture assembly comprising a light source, a reflector, and an optical shield that intercepts and redirects light to achieve a narrow beam, utilizing a combination of a heat sink, mounting bracket, and adjustable components to optimize light direction and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflector is used to direct light from the LED source, then light distribution is improved, but beam control precision deteriorates
Solution Approach 1:
The optical system is segmented into three distinct components: an LED light source, a reflector for light redirection, and an optical shield for beam control. This segmentation allows each component to perform its specialized function, with the reflector handling broad light distribution and the optical shield providing precise beam angle control, thereby resolving the contradiction between light distribution and beam control precision
Solution Approach 2:
The optical shield acts as an intermediary element positioned between the LED source and the final light output. It mediates the light path by selectively blocking portions of the light cone, thereby refining the beam angle and improving beam control precision without compromising the reflector's light distribution capability
2Area of stationary object
If light is emitted in a wide angle from the LED source, then light coverage area is improved, but beam focus deteriorates
Solution Approach 1:
The optical shield extracts or removes specific portions of the wide-angle light cone emitted by the LED source. By blocking the peripheral light rays that would contribute to wide coverage, the shield isolates the central, more focused portion of the light beam, thereby improving beam focus while maintaining sufficient coverage area through the reflector's light redirection
3Device complexity
If no optical shield is used, then device complexity is reduced, but beam angle control precision deteriorates
Solution Approach 1:
The optical shield introduces local quality modification to the optical system by selectively blocking specific angular portions of the light cone. This localized intervention at the shield position provides precise beam angle control without requiring complex adjustment mechanisms throughout the entire device, thereby achieving high beam control precision with relatively simple device structure
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 enables precise control of light beam angle and intensity, resulting in a focused and concentrated light output suitable for highlighting specific areas or creating desired lighting ambiances, with a beam angle of approximately 8 degrees and over 17,000 candelas at nadir, enhancing aesthetic and functional lighting applications.
Implementation Method 1
The reflector directs at least a portion of the beam of light emitted from the light source
Implementation Method 2
The shield is positioned in the reflector to intercept at least a portion of the light emitted from the light source
Data Source
AI summary
A light fixture assembly includes a light source, a reflector and a shield. The light source emits a beam of light. The reflector directs at least a portion of the beam of light emitted from the light source. The shield is positioned in the reflector to intercept at least a portion of the light emitted from the light source.