Gradient Polarized Eyewear via Solvent Dissolution
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Solution Overview
Problem
Current methods for producing polarized eyewear with gradient polarization are expensive and inadequate for individual wearer needs, as they often require complex and costly processes to achieve the necessary polarization densities and tinting, which can lead to distortion and inability to view polarized displays without removing the eyewear.
Innovation Solution
A method involving pre-formed PVA polarizing films that are modified by dipping into a solvent to create regions or gradients of non-polarization, allowing for the production of eyewear with unpolarized sections or gradient dichroism, enabling the wearer to view polarized displays without removing the eyewear, while maintaining mechanical strength and optical quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex processes are used to achieve gradient polarization, then polarization density control is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies parameter changes by controlling the dipping depth, temperature, and time of the polarizing film in the solvent to achieve different polarization densities in different regions of the lens. This allows gradient polarization to be created through simple parameter adjustments rather than complex manufacturing processes, resolving the contradiction between manufacturing precision and ease of manufacture
Solution Approach 2:
The patent creates local quality variations by allowing different regions of the polarizing film to be exposed to the solvent for different durations through controlled dipping. The portion of the film in contact with the solvent has reduced polarization density while the upper portion maintains full polarization, achieving gradient polarization with simple processing
2Object-affected harmful factors
If full polarization is applied to the entire lens, then glare protection is improved, but the ability to view polarized displays deteriorates
Solution Approach 1:
The patent applies local quality by creating distinct regions within the lens with different polarization properties. The upper portion maintains full polarization for glare protection, while the lower portion has reduced or eliminated polarization to allow viewing of polarized displays. This spatial differentiation of polarization density enables the lens to provide both functions simultaneously
Solution Approach 2:
The patent segments the lens into functionally different zones based on polarization density. The gradient polarization creates a transition zone between fully polarized and non-polarized regions, allowing the wearer to access different functions by directing gaze to different parts of the lens, thus resolving the contradiction between glare protection and display viewing capability
3Manufacturing precision
If polarization layers are stretched to provide gradient, then gradient polarization is achieved, but device complexity increases
Solution Approach 1:
The patent replaces the mechanical stretching process with a chemical/solvent-based approach. Instead of mechanically stretching the polarizing film to create gradient polarization, the invention uses controlled solvent exposure to selectively reduce polarization density in specific regions. This substitution of mechanical action with chemical action simplifies the manufacturing process while achieving the same gradient effect
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 allows for the production of polarized eyewear with gradient polarization at a lower cost, ensuring the wearer can view polarized displays without removing the eyewear, while maintaining the integrity and optical quality of the polarizing film, thus simplifying the process for prescription labs and reducing complexity.
Implementation Method 1
dipping the polarizing film (without a blank) or the blank comprising the polarizing film into a solvent dissolving the polarizing agent from the polarizing film
Data Source
AI summary
A method for producing polarized eyewear is disclosed, which includes providing a polarizing film or a blank of the eyewear having a polarizing film, whereby the polarizing film is made of a substrate film and a polarizing agent; dipping the polarizing film or the blank with the polarizing film into a solvent; and dissolving the polarizing agent from the polarizing film.