Spectacle Lens Coating with Microprotrusion Uniformity
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Solution Overview
Problem
Existing methods for applying coating films on spectacle lenses with microprotrusions result in uneven film thickness due to the formation of liquid pools around the microprotrusions.
Innovation Solution
The method involves applying an application liquid through spin coating to the surface of a lens substrate with microprotrusions, ensuring uniform film thickness by controlling the viscosity and rotation speed during the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coating application methods are used on lens substrates with microprotrusions, then the coating process is simple, but the film thickness becomes uneven around the microprotrusions
Solution Approach 1:
The patent applies spin coating technology which changes the application parameters by rotating the lens substrate at controlled speeds while applying the coating liquid. This parameter change enables the liquid to distribute uniformly around microprotrusions through centrifugal force, achieving even film thickness that conventional static application methods cannot achieve.
Solution Approach 2:
The spin coating process introduces mechanical rotation to the system, creating centrifugal forces that actively manage the coating liquid distribution. This mechanical motion prevents liquid pooling around microprotrusions and ensures uniform coating thickness, resolving the contradiction between simplicity and precision.
2Reliability
If the lens substrate has microprotrusions for optical performance, then the optical characteristics improve, but the coating film thickness uniformity deteriorates
Solution Approach 1:
By changing the application method to spin coating with controlled rotation speeds, the patent overcomes the interference that microprotrusions create during conventional coating. The rotational parameter enables uniform liquid distribution even on surfaces with microprotrusions, maintaining both optical characteristics and coating uniformity.
Solution Approach 2:
The patent replaces the passive gravitational flow of coating liquid in conventional methods with active centrifugal force generation through rotation. This mechanical substitution allows the coating liquid to be precisely controlled and distributed uniformly around microprotrusions, achieving both optical performance and coating uniformity.
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 approach allows for the formation of a coating film with excellent uniformity on the surface of spectacle lenses with microprotrusions, enhancing the durability and optical characteristics.
Implementation Method 1
forming the coating film by applying an application liquid, through spin coating, to the surface of the lens substrate that has the microprotrusions
Data Source
AI summary
Provided is a method for manufacturing a spectacle lens, wherein: the spectacle lens includes a lens substrate having microprotrusions on at least one surface, and a coating film formed on the surface of the lens substrate that has the microprotrusions; and the method includes forming the coating film by applying an application liquid, through spin-coating, to the surface of the lens substrate that has the microprotrusions.