Eyewear Lens with Interference Coating for Balanced Chroma
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Solution Overview
Problem
Existing sunglasses technologies fail to provide consumers with a choice of varied lens appearances while simultaneously achieving balance chroma enhancement visual perception, as they either fix the visual sensation color or compromise on color contrast due to uniform absorption or reflective coatings.
Innovation Solution
A spectacle lens with a predefined reflective appearance is developed, featuring a lens substrate with an optical interference coating stacked by high and low reflective index materials, accompanied by a complementary filter layer to maintain neutral balance transmittance light, ensuring three pass-bands corresponding to the maximum color response of human eye cone cells, and chromaticity coordinates within a neutral balance elliptical parameter equation in the CIE 1931 XY color space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a metallic luster color-coated eyewear lens is used to achieve a stylish appearance, then the exterior color is enhanced, but the internal visual sensation color becomes unbalanced and compromises color contrast enhancement
Solution Approach 1:
The patent divides the lens into two functional segments: an outer coating layer that provides the desired metallic luster appearance color, and an inner lens substrate that contains filter layers to correct the visual perception color. This segmentation allows each layer to perform its specific function independently - the coating provides style while the substrate ensures color balance.
Solution Approach 2:
The patent applies different optical properties to different parts of the lens system. The outer coating layer has high reflectivity for specific wavelengths to create the metallic appearance, while the inner substrate has selective absorption characteristics to correct color perception. Each layer has locally optimized properties for its specific function.
2Illumination intensity
If uniform color dye or gradient color dye is added to adjust sunlight intensity, then the visual perception color is fixed, but the choice of varied lens appearances is limited
Solution Approach 1:
The patent uses a composite structure combining multiple materials with different optical properties: the lens substrate material, metallic luster materials in the coating, and color filter materials. This composite approach allows simultaneous achievement of sunlight adjustment, varied appearance colors, and balanced visual perception.
Solution Approach 2:
The patent enables dynamic selection of different lens configurations with various appearance colors (blue, green, red, yellow, purple, brown metallic lusters) while maintaining consistent color balance performance. Each configuration can be chosen based on consumer preference for different styles and lighting conditions.
3Shape
If an optical interference coating is used to produce a fixed appearance color, then the reflective appearance is enhanced, but the visual sensation color remains fixed and lacks chroma enhancement
Solution Approach 1:
The patent separates the appearance color function (handled by the interference coating) from the visual perception color function (handled by the substrate filter layers). This allows the coating to provide the desired reflective appearance while the substrate simultaneously provides chroma enhancement and color balance for visual sensation.
Solution Approach 2:
The patent utilizes optical interference phenomena in the coating to produce different appearance colors based on light wavelength reflection, while the substrate filter layers selectively transmit and enhance specific color ranges for visual perception. The two layers work together to achieve different appearance colors with consistent chroma enhancement.
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 allows consumers to choose lenses with balanced chroma enhancement visual perception across all color spaces, providing a variety of reflective appearances while maintaining neutral balance and optimal color contrast, enhancing the visual experience by ensuring the reflective and transmittance light spectra align with human eye sensitivity.
Implementation Method 1
the optical interference coating is stacked by means of high and low reflective index materials, light passes through the optical interference coating to produce a reflective appearance color predefined
Implementation Method 2
at least one side surface of the lens substrate, both side surfaces of the lens substrate or inside of the lens substrate comprises at least another filter layer and its filtered light is complementary to the light after passing through the optical interference coating
Data Source
AI summary
Provided is an eyewear lens, including a lens substrate and an optical interference coating; the lens substrate is comprised of an optical material, and the optical interference coating is bonded to the lens substrate and is stacked by the composition of high and low reflectivity materials. A predefined reflective appearance color will be formed by light getting through the optical interference coating. The lens substrate contains another filter on one side surface or both side surfaces or inside the lens substrate which is complementary to the light after penetrating the optical interference coating such that the overall transmittance light tone remain neutral balance. The overall transmittance light spectrum has three pass-bands corresponding to the maximum response of the human eye cone cells, and the relatively high transmittance values of each pass-band center are approximately at 450 nm, 530 nm and 610 nm. The FWHM of each pass-band is between 3 nm and 50 nm.