Composite Lens with Volumetric Light Diffusion
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Solution Overview
Problem
Existing composite lenses for LED-based lighting fixtures suffer from significant material and manufacturing costs due to the need for separate diffusers or diffusive films, and they often exhibit inadequate optical performance, particularly in terms of color shift, which complicates the design and manufacturing process.
Innovation Solution
A composite lens formed from thermoplastic materials like polycarbonate or acrylic glass, incorporating diffusive additives such as Titanium Dioxide and Alumina, which are dispersed throughout the lens to provide internal light diffusion, reducing the need for separate diffusers and minimizing color shift by controlling the particulate size and distribution of these additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a separate diffuser or diffusive film is used to provide light diffusion, then light mixing and distribution are improved, but material costs and manufacturing complexity increase
Solution Approach 1:
The patent combines the lens and diffuser into a single integrated component. Diffusive additives are incorporated directly into the lens material matrix, eliminating the need for separate diffuser components or films. This merging reduces part count, simplifies manufacturing, and lowers material costs while maintaining effective light diffusion and mixing capabilities.
Solution Approach 2:
The patent creates a composite material by incorporating diffusive additives (such as titanium dioxide, alumina, or silica particles) into the lens material matrix. This composite structure provides both the optical focusing properties of the lens and the light-diffusing properties of the additives, achieving multiple functions within a single homogeneous material system.
2Illumination intensity
If diffusive additives are added to the lens material, then internal light diffusion is achieved, but color shift increases
Solution Approach 1:
The patent carefully controls the parameters of the diffusive additives, including particle size (typically 0.1-10 micrometers), concentration (1-20 weight percent), and material composition. By optimizing these parameters, the patent achieves effective light diffusion while minimizing color shift, as smaller and more uniformly distributed particles scatter light more evenly across the visible spectrum.
Solution Approach 2:
The patent considers the spatial distribution and concentration gradients of diffusive additives within the lens material. By controlling the local quality and uniformity of additive distribution, the patent optimizes light diffusion in different regions of the lens while maintaining consistent optical properties and minimizing color shift across the entire component.
3Reliability
If multiple components (lens and diffuser) are used, then optical performance is improved, but material costs increase
Solution Approach 1:
The patent merges the lens and diffuser into a single integrated component, eliminating the need for separate diffuser materials. This reduces the total quantity of materials required, lowers material costs, and simplifies the bill of materials while maintaining the combined optical performance of focusing and diffusion functions.
Solution Approach 2:
The patent creates a multi-functional lens-diffuser hybrid component that performs both optical focusing (lens function) and light scattering (diffuser function) simultaneously. This universal component eliminates the need for separate specialized components, reducing material requirements and overall system cost while maintaining reliable optical performance.
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 enhanced composite lens achieves reduced color shift, improving optical performance and simplifying manufacturing by integrating diffusion within the lens, thus reducing material and manufacturing costs while maintaining effective light distribution.
Implementation Method 1
diffusive additives are dispersed throughout the body of the composite lens and as such, light diffusion occurs volumetrically within and throughout the body of the composite lens
Data Source
AI summary
The present disclosure relates to an enhanced composite lens, which is formed from a material, such as thermoplastic material. The thermoplastic material may be polycarbonate, acrylic glass, and the like. To form the composite lens, a resin of the desired thermoplastic material is formed in the desired shape of a lens. To facilitate light diffusion within the body of the resultant lens, diffusive additives are added to the thermoplastic resin when forming the composite lens. As such, the diffusive additives are dispersed throughout the body of the composite lens and light diffusion occurs volumetrically within and throughout the body of the composite lens.