Fresnel Optic Array for Low-Profile Warning Systems
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Solution Overview
Problem
Existing optical warning systems face inefficiencies in light transmission due to scattering, particularly in forming collimated beams, which reduces their effectiveness in providing clear visual warnings to observers.
Innovation Solution
A low-profile optical warning system incorporating a Fresnel optic array with specifically designed concentric ring facets and a draft angle to minimize light loss, combined with an optical diffuser for enhanced light transmission and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional optical systems are used to form collimated beams, then light transmission is achieved, but light scattering occurs which reduces optical transmission efficiency
Solution Approach 1:
The optical system is segmented into distinct functional zones: an inner group of concentric ring facets for primary collimation and an outer group for beam shaping. This segmentation allows each zone to be optimized independently, reducing light scattering at interfaces and improving overall optical transmission efficiency by directing light more precisely through the collimated beam path.
Solution Approach 2:
Different regions of the Fresnel optic array are given different facet spacing characteristics - the inner group has greater facet spacings optimized for capturing light from the light-emitting area, while the outer group has smaller facet spacings optimized for forming the collimated beam. This local quality variation ensures optimal light transmission in each region, minimizing scattering losses throughout the entire optical path.
2Productivity
If Fresnel optic array with rounded peaks is used, then light rays are directed to form collimated beam, but light scattering occurs at rounded peaks reducing transmission efficiency
Solution Approach 1:
The harmful rounded peak features that cause light scattering are extracted and removed from the optical path. Instead of having rounded peaks where draft facets meet optical facets, the design uses sharp edges or alternative joining methods that eliminate the scattering centers, thereby maintaining collimated beam formation while reducing light transmission losses.
Solution Approach 2:
The draft facets, which were originally creating harmful rounded peaks that scattered light, are reconfigured to have inclined surfaces that actively direct light into the collimated beam. The draft angle is specifically designed so that the draft facets become useful light-directing elements rather than harmful scattering sources, converting the potential harm into a beneficial light-guiding function.
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 system achieves improved optical transmission efficiency and effective visual warning coverage by reducing light scattering and maintaining a collimated beam, providing a clear and intense warning signal both directly in front and around the system.
Implementation Method 1
A Fresnel optic array positioned between the optical diffuser and the light-emitting area is spaced apart from and spatially aligned with the light-emitting area to receive the light rays emitted from the light-emitting area and form a collimated light beam
Implementation Method 2
The light rays propagate through an optical diffuser to provide a visual warning signal to an observer remotely located from the optical warning system
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
An optical warning system comprises a light head that includes a light source emitting light rays from a light-emitting area. The light rays propagate through an optical diffuser to provide a visual warning signal to an observer remotely located from the optical warning system. A Fresnel optic array positioned between the optical diffuser and the light-emitting area is spaced apart from and spatially aligned with the light-emitting area to receive the light rays emitted from the light-emitting area and form a collimated light beam. The Fresnel optic array is fabricated so that it exhibits increased optical transmission efficiency by reducing light lost to scattering in forming the collimated light beam.