Spectacle Lens Holder Mounting via Concave Surface Imaging
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Solution Overview
Problem
Existing methods for mounting a lens shape processing lens holder to a spectacle lens with alignment reference marks on a concave surface are prone to positional deviations due to parallax and lens power, leading to pupillary distance errors during lens shape processing.
Innovation Solution
A block device with a support unit, imaging unit, monitor, and information processing unit that adjusts the spectacle lens to a reference posture for precise alignment of index marks with alignment reference marks, allowing accurate determination of the holder mounting center position on the convex surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If alignment reference marks are formed on the concave surface of the spectacle lens, then the distant view is not obstructed, but positional deviations occur during holder mounting due to parallax and lens power
Solution Approach 1:
The patent introduces an intermediary imaging process using a camera to capture the alignment reference marks on the concave surface. The captured image is then processed to calculate the holder mounting center position, serving as a mediator between the concave surface marks and the convex surface mounting location. This eliminates direct visual alignment issues caused by parallax and lens power.
Solution Approach 2:
The patent creates a digital copy (image) of the alignment reference marks on the concave surface through camera imaging. This copy is then used for precise position calculation without requiring direct visual observation through the lens, thereby avoiding parallax errors and maintaining measurement precision while keeping marks on the concave surface.
2Device complexity
If visual recognition method is used to determine holder mounting center position, then the process is simple, but positioning accuracy is low due to parallax and lens power effects
Solution Approach 1:
The patent replaces the mechanical/visual recognition system with an optical imaging system (camera) and computational system. Instead of direct visual observation through the lens, the system uses camera imaging from the convex surface side and calculates the mounting position based on captured images, substituting manual visual alignment with automated image processing.
Solution Approach 2:
The imaging unit and information processing unit serve as intermediaries between the alignment reference marks and the holder mounting process. The camera captures images of the marks, and the processing unit calculates the precise mounting center position, mediating the transfer of positional information without direct visual observation.
3Ease of operation
If alignment reference marks are formed on the convex surface, then holder mounting is easier to align visually, but the alignment reference marks become obstacles in the distant view
Solution Approach 1:
The imaging unit acts as an intermediary that captures images of the alignment reference marks on the concave surface, allowing the operator to see the marks clearly on the monitor without them being visible through the lens during wear. This mediates between the need for visible marks during mounting and the need for clear distant view during use.
Solution Approach 2:
Instead of placing marks on the convex surface where they are easily visible but obstruct the view, the patent inverts the approach by placing marks on the concave surface and using imaging technology to make them visible during mounting, thereby eliminating the obstruction problem while maintaining alignment capability.
4Measurement precision
If imaging unit is added to capture alignment reference marks, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The imaging unit serves multiple functions: capturing alignment reference marks, enabling position calculation, and providing a digital record for verification. This multi-functionality justifies the added complexity by consolidating several functions into a single integrated component.
Solution Approach 2:
The patent replaces complex manual alignment procedures with a simpler automated imaging and calculation system. While the device complexity increases due to the imaging unit, the operational complexity and time required for accurate positioning are significantly reduced.
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 highly precise mounting of the lens shape processing lens holder, reducing errors and ensuring accurate pupillary distance alignment during lens processing.
Implementation Method 1
Existing methods for mounting a lens shape processing lens holder to a spectacle lens with alignment reference marks on a concave surface are prone to positional deviations due to parallax and lens power
Data Source
AI summary
Provided is a block device that mounts a lens shape processing lens holder to a convex surface of a spectacle lens with two alignment reference marks for identifying a distance portion design reference point on a concave surface. The block device includes an imaging unit that images the alignment reference marks of the spectacle lens supported by a support unit from a convex surface side of the spectacle lens, an information processing unit that obtains expected imaged positions of the alignment reference marks imaged by the imaging unit, using information regarding the spectacle lens, when a posture of the spectacle lens supported by the support unit becomes a reference posture suitable for mounting the lens holder, and a display control unit that displays images of index marks indicating the expected imaged positions obtained in the information processing unit and images of the alignment reference marks.