Optical Element with Frosted Zone for Clear Cut-off Line
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED spotlight lenses with spherical surfaces fail to create a clear cut-off line for side light spots, resulting in non-uniform illumination and insufficient central light intensity.
Innovation Solution
An optical element with a light emergent surface featuring a frosted surface, connected in sequence with transparent surfaces, and a reflector with a serrated surface, forming a cavity to enhance light distribution and create a clear cut-off line, improving both side and front light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a lens with a spherical surface is used, then the structure is simple and manufacturing is easy, but the side light spot cannot form a clear cut-off line and the illumination uniformity is poor
Solution Approach 1:
The optical element applies local quality by differentiating the light emergent surface into three distinct zones: a first transparent surface for uniform transmission, a frosted surface for diffuse scattering to create the cut-off line, and a second transparent surface for controlled transmission. This local differentiation of optical properties resolves the contradiction by maintaining manufacturing simplicity while achieving superior illumination uniformity and cut-off line formation.
2Ease of manufacture
If a lens with a spherical surface is used, then the manufacturing cost is low, but the central light intensity is insufficient
Solution Approach 1:
The invention merges the lens and reflector into an integrated optical element where the lens body incorporates both light transmission functions and reflective surfaces. This merging allows the optical element to concentrate light effectively toward the center while maintaining cost-effective manufacturing, resolving the contradiction between low manufacturing cost and sufficient central light intensity.
3Device complexity
If a lens is used without a reflector, then the structure is simple, but the light distribution uniformity is poor
Solution Approach 1:
The invention merges the reflector functionality directly into the lens structure by incorporating reflective surfaces on the optical element body. This integration maintains relative structural simplicity while significantly improving light distribution uniformity through the combined refraction and reflection effects, resolving the contradiction between device complexity and light distribution uniformity.
4Device complexity
If the light emergent surface is entirely transparent, then the structure is simple, but the cut-off line cannot be formed
Solution Approach 1:
The optical element applies local quality by differentiating the light emergent surface into three distinct zones: a first transparent surface for uniform transmission, a frosted surface for diffuse scattering to create the cut-off line, and a second transparent surface for controlled transmission. This local differentiation of optical properties resolves the contradiction by maintaining manufacturing simplicity while achieving superior illumination uniformity and cut-off line formation.
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 achieves improved uniformity of side light spots, increased central light intensity, and reduced reflector size, meeting application needs while maintaining cost-effectiveness.
Implementation Method 1
along a diameter direction of the light emergent surface, the light emergent surface comprises a first transparent surface, a frosted surface, and a second transparent surface, which are connected in sequence
Implementation Method 2
the optical element body is provided with a second reflective surface peripherally arranged along the light emergent surface. The second reflective surface and the light emergent surface may form a cavity
Data Source
AI summary
The present disclosure discloses an optical element and a light distributing module. The optical element includes an optical element body provided with a light incident surface and a light emergent surface; the optical element body is provided with a second reflective surface peripherally arranged along the light emergent surface; the second reflective surface and the light emergent surface form a cavity, and a light source is arranged in the cavity; the light incident surface is attached to a top of the light source; and along a diameter direction of the light emergent surface, the light emergent surface includes a first transparent surface, a frosted surface, and a second transparent surface, which are connected in sequence. The light distributing module includes: the above-mentioned optical element and a reflector; and along a direction away from the light emergent surface, one end of the reflector is connected with the light emergent surface.