Visor Measuring Bracket for Eyeglass Frame Lens Angle
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Solution Overview
Problem
Existing methods for determining the frame lens angle of spectacle frames, such as manual protractors and video centering systems, are prone to subjective errors and require additional measuring elements, making them inefficient and complex.
Innovation Solution
A visor measuring bracket with resilient, pivotable clamping elements and an elastic torsion bar, which can be easily attached to spectacle frames, allowing for precise determination of the frame lens angle using a video centering system, accommodating frames with strong curvature and varying sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual protractor methods are used to determine frame lens angle, then the measurement can be performed with simple equipment, but subjective measurement errors occur and the method is inefficient
Solution Approach 1:
The patent replaces manual mechanical protractor methods with an automated video centering system that uses image processing to determine frame lens angle. The system captures images of the spectacle frame and automatically calculates the angle through computational algorithms, eliminating subjective human error while maintaining simplicity in the overall measurement process.
Solution Approach 2:
The patent creates a visual copy of the spectacle frame through video imaging, allowing the frame lens angle to be determined by analyzing the captured image data rather than direct physical measurement. This copying approach enables precise angular calculation through image processing software.
2Measurement precision
If video centering systems with manual rotating measuring attachments are used, then frame lens angle can be determined, but large subjective errors occur due to manual parallel adjustment dependence on operator skill
Solution Approach 1:
The patent eliminates manual parallel adjustment by replacing it with an automated video-based measurement system. The system captures images of the spectacle frame and automatically determines the frame lens angle through image processing, removing the need for operator skill in manual alignment and adjustment.
Solution Approach 2:
The measurement system performs self-alignment and self-measurement through automated image processing algorithms. The system independently determines the frame lens angle without requiring operator intervention for parallel adjustment, making the measurement process autonomous and skill-independent.
3Measurement precision
If devices with additional measuring scales are used to determine centering data, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces physical measuring scales with a video-based measurement system. Instead of requiring additional mechanical measuring elements, the system uses image processing algorithms to extract centering data and frame lens angle information from captured images, thereby maintaining measurement precision while reducing device complexity.
Solution Approach 2:
The video centering system serves multiple measurement functions simultaneously - it can determine frame lens angle, centering data, and other optical parameters through a single imaging system, eliminating the need for separate dedicated measuring scales for each parameter.
4Measurement precision
If conventional visor measuring brackets are used, then frame lens angle can be measured, but they are heavy and difficult to operate with one hand
Solution Approach 1:
The patent replaces the heavy conventional visor measuring bracket with a lightweight video-based measurement system. Instead of using a physical bracket that must be manually positioned and operated, the system uses image capture and processing to determine frame lens angle, dramatically improving ease of operation while maintaining measurement precision.
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
Enables precise, effortless determination of the frame lens angle with reduced operator error, suitable for frames with large curvature and varying sizes, ensuring accurate centering data for lens selection.
Implementation Method 1
an elastic torsion bar, which can be easily attached to spectacle frames
Implementation Method 2
resilient, pivotable clamping elements
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to the use of a sighting measurement bracket, a sighting measurement bracket for determining the frame lens angle of an eyeglass frame using a video centering system, and a method for determining the frame lens angle. The sighting measurement bracket comprises a cross member (3), which has two markings (20) and can be placed on the eyeglass frame (1) and can be locked by means of a clamping device (4, 5). The clamping device (4, 5) comprises two clamping element pairs (7, 10), of which the respective lower clamping element (10) lies against the eyeglass frame in a resilient manner and likewise has a marking (19). According to the invention, each clamping element pair (7, 10) is arranged in a vertical shaft (11) at a distance from the rear side of the cross member (3). The lower, resilient clamping elements (10) are rigidly connected to said shaft (11) and are arranged so as to be slidable and horizontally pivotable. The markings (19) of the lower, resilient clamping elements (10) are arranged at a distance from the shaft (11) in the direction of the video centering system, and the markings (20) of the cross member (3) are respectively positioned in the fastening plane of the clamping element pairs (7, 10). The sighting measurement bracket has the advantage that the sighting measurement bracket is very light and can be operated well and placed on the glasses frame (1) by hand.