Ag/SiOx Nanoparticle Eyeglass Lens Blue Light Blocking
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Solution Overview
Problem
Current blue light-blocking eyeglasses, including those with yellow dyes or coatings, achieve inadequate blue light blocking rates, typically around 15%–25%, which is insufficient for effective eye protection against high-energy purplish blue light emitted by 3C devices.
Innovation Solution
Incorporating Ag/SiOx composite nanoparticles into eyeglass lens materials, which are evenly distributed or concentrated in the lens, allowing the lenses to absorb and block blue light through a material curing process, achieving a blue light blocking rate of approximately 30%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If yellow dye or coating is added to lenses to block blue light, then the lens color changes and blue light filtering is enabled, but the blue light blocking rate is insufficient (only 15%-25%)
Solution Approach 1:
The patent uses Ag/SiOx composite nanoparticles embedded in the lens material to block blue light. The composite structure combines silver nanoparticles (which absorb blue light through surface plasmon resonance) with silica shells, creating a material that achieves higher blue light blocking rates (30% or more) compared to simple yellow dyes or coatings.
Solution Approach 2:
The patent controls the particle size of silver nanoparticles (1-100 nm) and the thickness of silica shells to optimize blue light absorption. By adjusting these parameters, the lens achieves effective blue light blocking while maintaining optical clarity and avoiding excessive coloration.
2Object-affected harmful factors
If Ag/SiOx composite nanoparticles are incorporated into lens material, then blue light blocking rate increases to approximately 30%, but the manufacturing process becomes more complex
Solution Approach 1:
The Ag/SiOx composite nanoparticles are pre-synthesized and surface-modified before being incorporated into the lens material. The nanoparticles are first prepared with appropriate size and silica coating, then mixed with monomers and cured to form the final lens. This preliminary preparation simplifies the overall manufacturing process by separating the nanoparticle synthesis from the lens fabrication steps.
Solution Approach 2:
The patent uses a surface modifier as an intermediary substance that facilitates the incorporation of Ag/SiOx nanoparticles into the lens material. The surface modifier ensures uniform distribution and stable integration of nanoparticles during the curing process, simplifying manufacturing while maintaining high blue light blocking 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 use of Ag/SiOx composite nanoparticles in eyeglass lenses significantly enhances blue light blocking efficacy, providing better eye protection against the harmful effects of high-energy blue light from 3C devices.
Implementation Method 1
As the Ag/SiOx composite nanoparticles in the eyeglass lens material can absorb blue light (purplish blue light) that has relatively high energy
Data Source
AI summary
An eyeglass lens material can be used to make an eyeglass lens and at least includes a mixture of Ag/SiOx composite nanoparticles and at least one type of monomer. The eyeglass lens is capable of blocking blue light. The monomer undergoes a material curing procedure to form a main body that contains and is mixed with the Ag/SiOx composite nanoparticles. As the Ag/SiOx composite nanoparticles in the eyeglass lens material can absorb relatively high-energy blue light, a contact lens made of the eyeglass lens material can block blue light.