Eyewear Lens Optical Filter Spectral Attenuation Chroma
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Solution Overview
Problem
Conventional eyewear lenses fail to enhance color vividness and clarity effectively, particularly in specific environments or activities, as they do not adequately attenuate light in targeted spectral bands to improve chroma values and contrast.
Innovation Solution
The development of eyewear lenses incorporating an optical filter that attenuates visible light in specific spectral bands with absorbance peaks, increasing chroma values and clarity by selectively absorbing light, thereby enhancing the perception of colors in various environments, such as water, grass, or snow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional eyewear lenses use dark film or coating to attenuate visible light, then luminous transmittance is significantly decreased, but color vividness and chroma enhancement are not effectively improved
Solution Approach 1:
The optical filter is designed with non-uniform spectral attenuation characteristics, selectively attenuating light in specific spectral bands (blue, cyan, yellow-green, red) while allowing other wavelengths to pass through. This local quality approach targets specific wavelength ranges to enhance chroma values of particular colors without uniformly reducing all visible light transmission, thereby improving color vividness while maintaining adequate luminous transmittance.
Solution Approach 2:
The patent employs multiple absorbance peaks with specific parameters (central wavelengths, spectral bandwidths, attenuation factors) to achieve chroma enhancement. By carefully controlling parameters such as the attenuation factor (≥0.8) and spectral bandwidth (5-50 nm) of each absorbance peak, the filter transforms the spectral composition of transmitted light to increase chroma values in targeted color ranges while preserving overall visibility.
2Loss of information
If optical filter attenuates light in multiple spectral bands with high attenuation factor, then chroma values and color vividness are significantly increased, but overall light transmission is reduced
Solution Approach 1:
The optical filter applies partial action by selectively attenuating only specific spectral bands rather than uniformly attenuating all visible light. The attenuation is concentrated in four key spectral regions (blue, cyan, yellow-green, red) with attenuation factors ≥0.8, while other spectral regions maintain higher transmittance. This partial approach achieves sufficient chroma enhancement without excessive reduction of overall light transmission.
Solution Approach 2:
The patent controls the balance between chroma enhancement and light transmission by adjusting parameters of the absorbance peaks. The spectral bandwidth (5-50 nm) and attenuation factor (≥0.8) are optimized to achieve maximum chroma improvement while maintaining acceptable overall transmittance. The central wavelengths are positioned to target specific color ranges, allowing selective enhancement without excessive total attenuation.
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 lenses significantly increase the average chroma value of light transmitted, providing improved color vividness and clarity, enhancing visual acuity and contrast in specific settings, such as viewing objects on water or grass, by selectively attenuating light in targeted spectral bands.
Implementation Method 1
an optical filter within and/or outside of the lens body configured to attenuate visible light in a plurality of spectral bands
Data Source
AI summary
Some embodiments provide a lens including a lens body and an optical filter configured to attenuate visible light in certain spectral bands. At least some of the spectral bands can include spectral features that tend to substantially increase the colorfulness, clarity, and/or vividness of a scene. In certain embodiments, eyewear incorporates an optical filter that enhances chroma within one or more spectral bands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.