Color Vision Correction Lens with Fluorescent Layer
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Solution Overview
Problem
Conventional color vision correction lenses for people with color vision deficiency have a deeply tinted appearance, which can be perceived as odd by others.
Innovation Solution
A color vision correction lens comprising a first resin layer with an absorbing material that absorbs light in a specific wavelength band and a second resin layer with a fluorescent material that emits fluorescence in an overlapping wavelength band, reducing the tinted appearance while correcting color vision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional eyeglass lens with a partial reflection film is used to correct color vision deficiency, then the color differentiation ability is improved, but the appearance becomes deeply tinted and odd-looking
Solution Approach 1:
The lens is divided into multiple functional layers: a first resin layer with an absorbing material that selectively absorbs light in the problematic wavelength band, and a second resin layer with a fluorescent material that converts absorbed light to fluorescence. This segmentation allows each layer to perform a specific function, achieving color vision correction while managing the appearance issue through the fluorescent emission.
Solution Approach 2:
The patent changes the optical parameters of the lens by using materials with specific absorption and fluorescence characteristics. The absorbing material has an absorption spectrum tailored to the wavelength band that causes color vision problems, while the fluorescent material has an emission spectrum that compensates for the absorbed light, thereby correcting color perception while reducing the deeply tinted appearance through controlled fluorescence emission.
2Measurement precision
If an absorbing material is used to correct color vision, then color differentiation is improved, but the lens develops a deeply tinted appearance
Solution Approach 1:
The patent converts the harmful effect of light absorption (which causes deep tinting) into a beneficial effect by using the absorbed light energy to excite the fluorescent material. The fluorescent material then emits light in the visible spectrum, compensating for the absorbed light and reducing the deeply tinted appearance while maintaining color vision correction functionality.
Solution Approach 2:
The fluorescent material acts as an intermediary between the absorbing material and the external environment. It receives energy from the absorbing material and converts it into visible fluorescence that compensates for the absorbed light, thereby mediating between the color correction function and the appearance brightness issue.
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 lens maintains color vision correction functionality while appearing less tinted to others, effectively addressing the aesthetic concerns associated with conventional lenses.
Implementation Method 1
the first resin layer includes an absorbing material that absorbs light in a first wavelength band
Implementation Method 2
the second resin layer includes a fluorescent material that emits fluorescence in a second wavelength band
Data Source
AI summary
A color vision correction lens (1) includes: a first resin layer (10) having a convex surface (10a); and a second resin layer (20) stacked on the convex surface (10a). The first resin layer (10) includes an absorbing material (12) that absorbs light in a first wavelength band (90). The second resin layer (20) includes a fluorescent material (22) that emits fluorescence in a second wavelength band (92). The first wavelength band (90) and the second wavelength band (92) overlap at least partially.