Accommodation Assisting Lens Dotted Structure
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Solution Overview
Problem
Existing eyeglasses with automatic focus adjustment have complex structures due to the need for multiple components such as visual line direction detectors and focal distance adjusters.
Innovation Solution
A simple structure accommodation assisting lens that reduces contrast by providing a phase difference in the lens, allowing for easy focus and improved near vision without increasing the complexity of the eyewear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic focus adjustment eyeglasses are equipped with visual line direction detectors and focal distance adjusters, then focus adjustment function is improved, but device complexity increases significantly
Solution Approach 1:
The patent extracts the focus adjustment function from complex mechanical/electronic systems and implements it through a simple optical pattern (dotted structure) on the lens surface. The dotted pattern with specific spacing and size creates the accommodation effect passively without requiring detectors or active adjustment mechanisms, thus removing complex components while retaining the core function.
Solution Approach 2:
The lens structure itself provides the focus adjustment function through its dotted pattern design. The optical properties of the dotted structure automatically create the necessary phase differences and contrast reductions to assist accommodation, without requiring external control systems, power sources, or active adjustment mechanisms.
2Loss of time
If a dotted structure is provided on the lens surface to reduce contrast, then accommodation response time is shortened, but light transmittance is reduced
Solution Approach 1:
The lens surface is divided into dotted regions and non-dotted regions, each with different optical properties. The dotted portions create phase differences to reduce contrast and assist accommodation, while the non-dotted portions maintain higher light transmittance. This local differentiation allows the lens to simultaneously achieve contrast reduction and maintain adequate brightness.
Solution Approach 2:
The patent optimizes parameters such as dot size, dot spacing, and dot density to achieve the desired balance between contrast reduction and light transmittance. By carefully controlling these parameters, the lens can provide sufficient contrast reduction for accommodation assistance while minimizing the impact on overall light transmission.
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 achieves a shorter accommodation response time and improves near vision by reducing contrast while maintaining visibility, thus simplifying the structure of eyeglasses.
Implementation Method 1
transmitted light from the dotted structure has a phase difference, and contrast is reduced by the phase difference
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3
AI summary
An accommodation assisting lens comprises a lens main body, and dots that are isotropically and uniformly disposed in the lens main body, and in a visible light region, a difference in average transmittance between a dot portion based on the dots, and a non-dot portion other than the dot portion is 2% to 50% inclusive.