Compound-Curvature Goggle Lens for Distortion-Free Viewing
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Solution Overview
Problem
Conventional goggles with compound curvature suffer from image inconsistency and distortion when the wearer looks in various directions, leading to visual discomfort and increased risk of danger during athletic activities.
Innovation Solution
A goggle lens with multiple lens portions having distinct vertical radii of curvature, including a first convex surface with a first vertical radius, second convex surfaces with a second vertical radius, and a third convex surface with a third vertical radius, integrated into a seamless laminated structure for improved visual clarity and reduced distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional goggle lens with single or uniform compound curvature is used, then the lens structure is simple and easy to manufacture, but image inconsistency and distortion occur when the wearer looks in various directions
Solution Approach 1:
The goggle lens is divided into multiple lens portions (first lens portion, second lens portion, third lens portion) with different vertical radii of curvature. Each lens portion is optimized for specific viewing directions, with the first lens portion having a first vertical radius of curvature, the second lens portion having a second vertical radius of curvature, and the third lens portion having a third vertical radius of curvature. This segmentation eliminates image distortion while maintaining manufacturability through modular design.
Solution Approach 2:
Different regions of the lens are assigned different optical properties (vertical radii of curvature) according to the specific viewing requirements of each region. The first lens portion, second lens portion, and third lens portion each have locally optimized curvature characteristics matched to their respective functional zones, improving image consistency across all viewing directions without requiring complete redesign of the entire lens.
2Area of moving object
If a goggle lens with varying radius of curvature is used to expand field of view, then the field of view is improved, but visual discomfort and dizziness occur due to image distortion
Solution Approach 1:
The lens is segmented into multiple portions with different vertical radii of curvature optimized for specific viewing directions. This allows each segment to provide appropriate field of view expansion for its direction while maintaining image consistency, preventing the visual discomfort and dizziness that would result from uniform curvature variations across the entire lens.
Solution Approach 2:
Each lens portion has locally optimized vertical radius of curvature tailored to its specific viewing function. This local optimization ensures that field of view expansion is achieved in each direction without introducing image distortion, thereby maintaining visual comfort and reliability while maximizing the overall field of view.
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 goggle lens provides enhanced visual perception and prevents image distortion, enhancing safety and comfort by maintaining a clear field of view during various head movements, particularly during athletic activities.
Implementation Method 1
The first convex surface has a first vertical radius of curvature along a first meridian direction. The at least one second lens portion is integrally connected with a lower edge of the first lens portion, and includes a second convex surface that is distal to the wearer's face. The second convex surface has a second vertical radius of curvature along a second meridian direction. The second vertical radius of curvature is different from the first vertical radius of curvature.
Data Source
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AI summary
A goggle lens is coupled with a goggle frame (90) for enclosing a wearer's head, and includes a first lens portion (1), at least one second lens portion (2) integrally connected with a lower edge of the first lens portion (1), and a third lens portion (3) integrally formed with and extends upwardly from an upper edge of the first lens portion (1). A first convex surface (12) of the first lens portion (1) has a first vertical radius of curvature (ROC11) which is different from a second vertical radius of curvature (ROC12) of a second convex surface (22) of the second lens portion (2), and is different from a third vertical radius of curvature (ROC13) of a third convex surface (32) of the third lens portion (3) so as to provide a wearer with good visual effects.