Automobile Headlamp Lens with Concentric Annular Surfaces
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Solution Overview
Problem
Conventional automobile lamp lenses fail to effectively manage sunlight incidence, leading to internal and external focusing issues that can damage components, and existing solutions like biconvex lenses either incompletely address focusing problems or result in high material costs and reduced luminous efficiency.
Innovation Solution
A lens design featuring a first lens surface and a second lens surface with multiple concentric annular surfaces, allowing parallel light to be focused without affecting horizontal parallel light, thereby preventing unwanted focusing of sunlight both internally and externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lens design is used, then horizontal parallel light can be focused, but sunlight incident at angles causes harmful internal and external focusing
Solution Approach 1:
The second lens surface is segmented into multiple concentric annular surfaces, each with different curvature radii. This segmentation allows the lens to handle different incident light angles separately, preventing harmful focusing of sunlight while maintaining the ability to focus horizontal parallel light for normal operation.
Solution Approach 2:
Different regions of the lens surface are given different optical properties through varying curvature radii in the annular surfaces. The center region focuses horizontal light effectively, while outer annular regions with different curvatures prevent focusing of oblique sunlight, creating local quality variations that solve the contradiction.
2Reliability
If a biconvex lens is used to reduce focusing problems, then material costs increase and luminous efficiency decreases
Solution Approach 1:
Instead of using a thick biconvex lens that reduces luminous efficiency, the patent segments the second surface into annular zones with different curvatures. This allows thin lens design that maintains high luminous efficiency while the segmented structure prevents harmful sunlight focusing.
Solution Approach 2:
The curvature radius parameter is changed across different annular surfaces rather than maintaining a uniform biconvex shape. This parameter variation allows the lens to prevent sunlight focusing damage without requiring the excessive thickness and material of a biconvex lens, thus maintaining luminous efficiency.
3Loss of substance
If the lens thickness is reduced to save material and cost, then shock resistance may be compromised
Solution Approach 1:
The lens utilizes curved annular surfaces with optimized curvature radii that provide structural strength while maintaining thin profile. The curved geometry distributes stress more effectively than flat surfaces, enabling the thin lens to achieve adequate shock resistance with reduced material usage.
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 lens design effectively eliminates harmful focusing of sunlight, reduces material usage and costs, and enhances shock resistance and luminous efficiency by distributing light energy more efficiently.
Implementation Method 1
Light emitted by the light source is transmitted from an internal lens surface to an external lens surface; the incident light is focused near the focus of the lens
Implementation Method 2
Light emitted by the light source is converged near a far focus of the ellipsoidal reflector after being reflected by the ellipsoidal reflector
Data Source
AI summary
A lens for an automobile lamp, an automobile headlamp, and an automobile are disclosed. A lens (1) for an automobile lamp includes a first lens surface (11) and a second lens surface (12) opposite to the first lens surface (11). The first lens surface (11) is a curved surface or a planar surface. The second lens surface (12) includes multiple concentric circle-type annular surfaces. By means of multiple annular surfaces (13) disposed on the second lens surface (12) of the lens (1), parallel incident light that forms an angle with a horizontal direction can be separately incident on several small surfaces without affecting horizontal parallel light penetrating the lens and being focused, so that neither light reflected by the lens nor light penetrating the lens can be effectively focused.