Structural Color via Multilayer Optical Interference
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Solution Overview
Problem
Conventional coloration methods using dyes and pigments are environmentally unfriendly and lack aesthetic appeal, as they rely on chemical properties rather than physical interactions with light.
Innovation Solution
The use of an optical element with reflective layers and constituent layers, disposed between stacks, to create structural colors through scattering, refraction, reflection, and interference of light, eliminating the need for dyes or pigments by imparting different colors from each side of the element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dyes and pigments are used for coloration, then color can be achieved, but environmental harm increases and aesthetic appeal decreases
Solution Approach 1:
The patent replaces chemical coloration methods (dyes and pigments) with physical optical methods using multilayer reflective structures. The color is generated through optical interference and reflection from alternating layers of materials with different refractive indices, eliminating the need for chemical dyes and pigments that cause environmental harm.
Solution Approach 2:
The patent employs composite multilayer structures consisting of alternating layers of materials with different refractive indices (such as TiO2 and SiO2, or metal oxides and polymers). These composite layers work together to produce structural color through optical interference, replacing single-material dye or pigment systems.
2Ease of manufacture
If dyes and pigments are used for coloration, then color can be achieved, but aesthetic appeal decreases due to lack of iridescent effects
Solution Approach 1:
The patent generates color through structural optical effects rather than chemical pigments. The multilayer reflective structure produces iridescent colors that change with viewing angle and illumination conditions, creating dynamic aesthetic effects that static dye-based colors cannot achieve. The color arises from constructive and destructive interference of light waves reflected from different layer interfaces.
3Object-affected harmful factors
If conventional coloration methods are used, then manufacturing is simple, but environmental friendliness decreases
Solution Approach 1:
The patent divides the color-generating function into multiple discrete layers, each with specific optical properties. The multilayer structure segments the optical path into distinct interfaces where reflection and interference occur, allowing precise control over the resulting color while maintaining environmental friendliness by eliminating dyes and pigments.
4Illumination intensity
If multilayer reflective structures are used, then structural color with iridescent effects is achieved, but device complexity increases
Solution Approach 1:
The patent controls the optical properties by adjusting parameters such as layer thickness, refractive index, and layer sequence. By varying these parameters, different colors and iridescent effects can be achieved from the same basic multilayer structure, providing design flexibility without requiring fundamentally different complex structures for each color.
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
This method provides aesthetically appealing structural colors that differ from the underlying surface, offering iridescent effects without environmental impact, suitable for various applications like footwear, apparel, and sporting equipment.
Implementation Method 1
structural colors are visible colors produced, at least in part, through optical effects (e.g., through scattering, refraction, reflection, interference, and/or diffraction of visible wavelengths of light)
Implementation Method 2
structural colors are visible colors produced, at least in part, through optical effects (e.g., through scattering, refraction, reflection, interference, and/or diffraction of visible wavelengths of light)
Implementation Method 3
structural colors are visible colors produced, at least in part, through optical effects (e.g., through scattering, refraction, reflection, interference, and/or diffraction of visible wavelengths of light)
Implementation Method 4
structural colors are visible colors produced, at least in part, through optical effects (e.g., through scattering, refraction, reflection, interference, and/or diffraction of visible wavelengths of light)
Data Source
AI summary
As described above, one or more aspects of the present disclosure provide articles having structural color, and methods of making articles having structural color.