Gradient Lens Manufacturing via Imbibition Heat Diffusion
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Solution Overview
Problem
Current methods for producing optical articles with gradient properties are costly and require additional manufacturing steps, making them inefficient and costly.
Innovation Solution
A method involving the application of an imbibition composition onto a substrate, followed by irradiation with heat to create a heat gradient, allowing the dye to diffuse and form a concentration gradient, which then forms a gradient pattern upon exposure to actinic radiation, using a stationary setup with a heat source offset relative to the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce optical articles with gradient properties, then gradient effects can be achieved, but manufacturing complexity and costs increase
Solution Approach 1:
The patent combines multiple manufacturing operations into a single integrated process. The coating application, heat treatment for dye diffusion, and gradient formation are merged into one continuous process where the substrate is coated with dye solution, heated to diffuse the dye, and the offset heat source automatically creates the gradient pattern without separate manufacturing steps.
Solution Approach 2:
The heat source serves multiple functions simultaneously: it heats the substrate for dye diffusion, creates the temperature gradient for pattern formation, and the offset positioning provides both the gradient effect and uniform heating zones. This multi-functionality eliminates the need for separate heating and gradient-creation equipment.
2Manufacturing precision
If additional manufacturing steps are added to achieve gradient properties, then gradient effects can be produced, but manufacturing costs increase
Solution Approach 1:
The patent combines multiple manufacturing operations into a single integrated process. The coating application, heat treatment for dye diffusion, and gradient formation are merged into one continuous process where the substrate is coated with dye solution, heated to diffuse the dye, and the offset heat source automatically creates the gradient pattern without separate manufacturing steps.
Solution Approach 2:
The offset heat source creates a self-forming gradient pattern through the natural temperature distribution during heating. The system uses its own heat source to automatically generate the desired gradient effect without requiring additional processing steps or equipment, making the process self-sufficient and cost-effective.
3Manufacturing precision
If precise and reproducible processing is required for gradient coating, then gradient properties can be achieved, but process complexity increases
Solution Approach 1:
The patent intentionally uses an asymmetric (offset) heat source positioning relative to the substrate. This asymmetric arrangement creates a controlled temperature gradient across the substrate surface, with the region closer to the heat source receiving more heat and the farther region receiving less heat, automatically producing the desired gradient pattern without complex control systems.
Solution Approach 2:
The patent controls the gradient formation by changing the thermal parameter distribution across the substrate. By maintaining different temperatures in different regions through offset heat source positioning, the dye diffusion rate varies spatially, creating the gradient pattern. This parameter-based control is simpler than mechanical or computational control methods.
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 enables the cost-effective formation of optical articles with controlled and predetermined gradient properties, reducing manufacturing complexity and costs while maintaining optical quality.
Implementation Method 1
irradiating at least a portion of the coated substrate with heat from a heat source to form a heat gradient across the coated substrate
Implementation Method 2
to diffuse the at least one dye into the imbibable surface to form an at least partially imbibed substrate having a dye concentration gradient corresponding to the heat gradient
Implementation Method 3
The term 'imbibition' or 'imbibe' is intended to mean and include permeation of the imbibition dye into the substrate
Implementation Method 4
The dye concentration gradient forms a gradient pattern upon exposure to actinic radiation
Data Source
Figure 1~2
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AI summary
A method of producing an optical article includes applying an imbibition composition having at least one dye onto at least a portion of at least one imbibable surface (45) of a substrate (20) to form a coated substrate (10). The method further includes irradiating at least a portion of the coated substrate with heat from a heat source (80) to form a heat gradient across the coated substrate (10) to diffuse the at least one dye into the imbibable surface to form an at least partially imbibed substrate having a dye concentration gradient corresponding to the heat gradient. The method further includes removing a residual component of the imbibition composition from the at least partially imbibed substrate. The dye concentration gradient forms a gradient pattern upon exposure to actinic radiation.