Continuous Scattering Lens for Uniform Light Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical lenses with discrete scattering elements suffer from issues such as poor homogeneity, diffractive concerns, visible scattering, fluctuating visual comfort, aliasing, and complex manufacturing, which affect the progression of myopia and hyperopia.
Innovation Solution
An optical lens with a continuous scattering area having a characteristic dimension of at least 2 mm, ensuring a uniform scattering ratio variation across sub-areas, and manufacturing methods like mold roughness, coating deposition, and core-shell particles to achieve consistent scattering properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If discrete scattering elements are used in optical lenses, then scattering function is achieved, but homogeneity of the lens is poor
Solution Approach 1:
The patent divides the continuous scattering area into multiple discrete scattering elements (dots, bumps, or recesses) arranged in a periodic pattern. Each element has a size between 5-50 micrometers and is spaced 50-200 micrometers apart, creating a segmented structure that maintains scattering function while improving manufacturing precision and reducing diffractive effects compared to a fully continuous scattering area.
Solution Approach 2:
The patent applies different scattering properties to different regions of the lens. The scattering elements are concentrated in the peripheral region while the central region maintains better optical quality. This local differentiation allows the lens to provide scattering function where needed (periphery) while maintaining visual comfort and reducing disturbances in the central viewing area.
2Reliability
If discrete scattering elements are uniformly spaced, then scattering is provided, but diffractive orders become visible
Solution Approach 1:
The patent carefully selects and controls the parameters of the scattering elements, including their size (5-50 micrometers), spacing (50-200 micrometers), and shape variations. By optimizing these parameters, the design achieves effective light scattering while minimizing diffractive effects. The non-uniform spacing and varied element shapes help eliminate regular diffraction patterns that cause visible orders.
Solution Approach 2:
The patent introduces asymmetry in the scattering element design by varying the shape, size, and spacing of individual elements rather than using perfectly uniform circles. Some elements may be elliptical, irregular, or have different dimensions, which disrupts the periodicity that causes diffractive orders while maintaining the overall scattering function.
3Reliability
If discrete scattering elements are used, then scattering function is achieved, but visual comfort fluctuates when moving eyes
Solution Approach 1:
The patent merges multiple scattering elements into a continuous scattering area that covers a significant portion of the lens periphery. This continuous distribution ensures that as the eye moves, there is always a sufficient number of scattering elements within the pupil aperture to maintain consistent scattering effect and visual comfort, eliminating the fluctuation caused by discrete, isolated elements.
Solution Approach 2:
The patent creates a homogeneous distribution of scattering elements throughout the peripheral region, ensuring uniform scattering density. This homogeneity, combined with the continuous area coverage, guarantees that the scattering function remains consistent regardless of eye position or pupil size variations, providing stable visual comfort.
4Productivity
If discrete scattering elements are manufactured using mold tools, then production is enabled, but manufacturing precision deteriorates over time
Solution Approach 1:
The patent incorporates the scattering element structure directly into the mold tool design during the lens manufacturing process. The mold includes predefined cavities or surface features that create the scattering elements as the lens material is injected or cast. This preliminary integration ensures consistent geometry from the first production run, eliminating the need for separate scattering element attachment steps and maintaining precision throughout production tooling life.
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 solution provides improved scattering without diffractive effects, maintains consistent visual comfort, and simplifies manufacturing, effectively slowing down the progression of myopia and hyperopia.
Implementation Method 1
at least one continuous scattering area having a characteristic dimension d greater than or equal to 2 mm, wherein any sub-area of characteristic dimension dsub comprised in the at least one continuous scattering area, with dsub greater than or equal to 0.05 mm, verifies: |% Iscat area−% Iscat subarea|<1Iscat area
Data Source
AI summary
Disclosed is an optical lens including at least one continuous scattering area having a characteristic dimension d greater than or equal to 2 mm. Any sub-area of characteristic dimension dsub included in the at least one continuous scattering area, with dsub greater than or equal to 0.05 mm, verifies: |% Iscat_area−% Iscat_subarea|<0.2*% Iscat_area, where % Iscat_area is the average intensity ratio of light scattered by the continuous scattering area, and % Iscat_subarea is the average intensity ratio of light scattered by the sub-area.