Optical Article Dye Resistant to Photo-degradation
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Solution Overview
Problem
Existing optical articles with filtering capabilities face challenges in achieving photo-stability, particularly in blocking harmful blue light and UV wavelengths without compromising transparency, abrasion resistance, or adhesion, and existing solutions often degrade over time or require detrimental additives.
Innovation Solution
Incorporating specific absorbing dyes with modified chromophore groups into an epoxy coating or substrate, which are stable during manufacturing and provide selective filtration without affecting existing coating properties, using dyes with specific substituents that enhance photo-stability and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If absorbing dyes are incorporated into optical articles to block harmful blue light and UV wavelengths, then light filtering capability is improved, but photo-stability deteriorates due to photo-degradation over time
Solution Approach 1:
A UV-absorbing layer is introduced as an intermediary component between the dye layer and the harmful UV radiation. This UV-absorbing layer protects the absorbing dye from UV-induced photo-degradation while maintaining the dye's blue light filtering function, thereby resolving the contradiction between filtering capability and photo-stability
Solution Approach 2:
The optical article is structured as a composite multi-layer system combining a UV-absorbing layer with a dye-containing layer. This composite structure allows each layer to perform its specific function - the UV layer provides protection against photo-degradation while the dye layer provides spectral filtering, thus achieving both improved filtering capability and enhanced photo-stability
2Object-affected harmful factors
If dyes are incorporated into optical articles to provide filtering function, then light transmission control is improved, but transparency deteriorates due to increased haze
Solution Approach 1:
The optical article is designed with spatially differentiated properties: the UV-absorbing layer provides protection without affecting visible transparency, while the dye layer provides selective wavelength filtering. By localizing different functions to different layers, the invention achieves effective light transmission control while maintaining high optical clarity and minimizing haze
3Object-affected harmful factors
If coatings are added to optical articles to provide filtering capability, then light blocking function is improved, but adhesion and mechanical properties deteriorate
Solution Approach 1:
The UV-absorbing layer is designed to serve multiple functions simultaneously: it provides UV protection to prevent photo-degradation, maintains optical clarity to preserve transparency, and adheres to the substrate to ensure mechanical integrity. This multi-functional design achieves improved light blocking function while preserving adhesion and mechanical properties
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 durable, transparent optical articles with improved photo-stability, effective blue light and UV blocking capabilities, and maintains the optical clarity and mechanical properties of existing coatings, while minimizing haze and photo-degradation.
Implementation Method 1
by means of lenses comprising a film partially inhibiting the light in the suitable wavelength range, through absorption or through reflection
Data Source
AI summary
The present invention relates to optical articles and optical filtering coatings comprising at least one absorbing dye comprising one of the groups of formulae of formulae (I), (II), (III) and (IV), wherein R represents an aryl or alkyl group, and the groups of formulae (I), (II), (III) and (IV) have at least one carbon atom substituted with a group chosen from -OH, -CN, bromo, -NO2, alkoxy, aryloxy, -COOH, -CHO, -COalkyl, -COaryl, haloalkyl, -SH, -S-alkyl, -S-aryl, -SO2alkyl,-OSO2alkyl, -SO2aryl, -OSO2aryl and sulfonamide, or have at least two carbon atoms substituted with a chloro group.