Spectacle Frame Dimensioning Using Biometrics and User Preferences
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Solution Overview
Problem
Existing methods for adapting spectacle frames to individual head shapes, particularly with odd-shaped heads and certain materials, are limited in precision and flexibility.
Innovation Solution
A method and device that utilize biometric data and user preferences to adapt a pre-determined spectacle frame design using mathematical models with splines, allowing for bespoke frame designs by applying reference points as control points to modify the frame's dimensions and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual bending with pliers is used to adapt spectacle frames, then the method works with metal and certain plastic frames, but it has limits with odd-shaped heads and certain materials
Solution Approach 1:
The patent replaces the manual mechanical bending process with pliers with an automated computer-controlled system. The system uses digital models of head shapes and mathematical representations of frame geometries to automatically calculate and execute precise bending operations, eliminating the limitations of manual adaptation while maintaining versatility across different head shapes and frame materials.
Solution Approach 2:
The patent transforms the frame adaptation process by changing from fixed geometric parameters to variable mathematical models. The frame geometry is represented by mathematical equations with adjustable parameters that can be optimized for any head shape, enabling precise adaptation across diverse configurations while maintaining manufacturing precision through computational control.
2Reliability
If iteration is used to find the correct shape by optician, then the method works not too bad, but it is time-consuming and lacks precision
Solution Approach 1:
The patent performs preliminary actions by creating digital models of both the head shape and frame geometry before any physical adaptation occurs. The system pre-calculates the optimal adaptation parameters using mathematical optimization, eliminating the need for time-consuming iterative adjustments by an optician while ensuring high-quality fit from the first attempt.
Solution Approach 2:
The patent implements a feedback mechanism where the digital model continuously compares the frame geometry against the head shape model during the calculation process. This real-time feedback allows the system to automatically adjust parameters and converge on the optimal solution, replacing manual iteration with automated, precise computational feedback loops that reduce time while maintaining or improving quality.
3Adaptability or versatility
If bespoke frame design is created from scratch, then perfect customization is achieved, but the design process becomes extremely complex
Solution Approach 1:
The patent segments the frame design into distinct mathematical components, each represented by its own mathematical model with specific parameters. This segmentation allows the system to handle customization systematically by adjusting individual component parameters rather than redesigning the entire frame from scratch, reducing design process complexity while maintaining high adaptability.
Solution Approach 2:
The patent creates a universal mathematical framework that can represent various frame types and head shapes using the same underlying mathematical models. This universal approach allows the system to handle diverse customization requirements through parameter adjustments within a single unified system, avoiding the need for completely different design processes for different frame types and reducing overall system complexity.
Data Source
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AI summary
A first aspect provides a method of determining user preferred dimensions of a spectacle frame for providing a bespoke spectacle frame design. The method comprises receiving biometric data related to dimensions of a head of the user and receiving pre-determined design data on a spectacle frame. The biometrics data are applied to the pre-determined design data, yielding a user specific spectacle frame design. Subsequently, the user specific frame design is provided to the user and user preference data related to the user specific frame design is received. The user preference data is applied to the user specific design, yielding the bespoke spectacle frame design defined by bespoke spectacle frame design data; and the bespoke spectacle frame design is provided to the user. A second aspect provides a device and a third aspect provides a computer programme.