Lens Assembly with Inter-Surface Light Blocking for Stray Light
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Solution Overview
Problem
Vehicle lamps in related art suffer from stray light due to defocus light emitted by light sources, which affects road lighting effect and driving safety.
Innovation Solution
A lens assembly with a light blocking member that includes light blocking portions arranged between adjacent light incident surfaces to prevent defocus light from irradiating adjacent optical units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If reflectors with relatively small focal lengths are used to improve brightness and light efficiency, then the light emission intensity is improved, but defocus light is generated that cannot pass through the focus of the light reflection surface, causing stray light on the road surface
Solution Approach 1:
A light blocking member is introduced as an intermediary element between the light source and adjacent light incident surfaces. This member includes light blocking portions positioned to intercept defocus light before it can reach adjacent optical units, thereby preventing stray light formation while preserving the beneficial small focal length reflector design for brightness enhancement
2Use of energy by moving object
If reflectors with relatively small focal lengths are used to improve light efficiency, then more light is concentrated, but a part of the light emitted by the light source does not pass through the focus of the light reflection surface, resulting in defocus light
Solution Approach 1:
The light blocking member converts the harmful defocus light into a controllable element by strategically positioning light blocking portions to intercept these rays. This transforms the potential harmful defocus light into a managed optical path, maintaining high light efficiency while preventing the formation of harmful stray light on the road surface
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
Effectively reduces or eliminates stray light, improving the road lighting effect and enhancing driving safety by ensuring that light is focused correctly onto the road surface.
Implementation Method 1
the light blocking member includes a plurality of light blocking portions, each of the plurality of light blocking portions is arranged between two adjacent light incident surfaces in the plurality of light incident surfaces to separate the two adjacent light incident surfaces
Implementation Method 2
the light emitted by the plurality of light sources is finally refracted to a road surface by the lens to form illumination
Implementation Method 3
light emitted by the light source is reflected by the corresponding light reflection surface and then converged near a focus of the corresponding light incident surface
Data Source
AI summary
A lens assembly, a vehicle lamp and a vehicle. The lens assembly comprises a lens and a light blocking member. The lens has a plurality of light incident surfaces; and the light blocking member comprises a light blocking portion, wherein the light blocking portion is arranged between two adjacent light incident surfaces so as to separate the two adjacent light incident surfaces from each other.