Spectacle Lens Hole Drilling Aligned to Pantoscopic Angle
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Solution Overview
Problem
Conventional spectacle lens processing devices face difficulties in accurately forming holes that account for the pantoscopic angle, leading to challenges in aligning the line of sight and optical axis, and are complex to operate when adjusting the angle of the hole.
Innovation Solution
A spectacle lens processing device equipped with a processor that acquires the pantoscopic angle and determines the relative angle between the drilling tool and the lens, allowing for precise hole formation by adjusting the drilling tool's position based on the acquired pantoscopic angle and the lens's holding position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the angle of the hole is determined only according to the shape of the lens, then the processing is simple, but the pantoscopic angle cannot be adjusted and the alignment between line of sight and optical axis is poor
Solution Approach 1:
The system changes the parameter determination method from solely lens shape-based to a combined approach incorporating pantoscopic angle as an additional parameter. The processor calculates the hole angle by integrating both the lens shape data and the pantoscopic angle setting, enabling accurate alignment while maintaining automated processing.
Solution Approach 2:
The processor acts as an intermediary that receives both lens shape information and pantoscopic angle settings, then computes the optimal hole angle that satisfies both requirements. This intermediary calculation layer reconciles the simplicity of automated processing with the precision of customized angle adjustment.
2Manufacturing precision
If the operator can freely set the hole angle, then the pantoscopic angle can be taken into account, but the setting procedure becomes complex
Solution Approach 1:
The system performs self-service by automatically calculating the optimal hole angle based on the lens shape and pantoscopic angle parameters. The processor executes the computation without requiring the operator to manually determine complex angle settings, thus maintaining precision while simplifying the user interface to only require basic parameter inputs.
Solution Approach 2:
The system performs preliminary calculation of the hole angle before the actual drilling operation. The processor pre-computes the optimal angle based on lens shape and pantoscopic angle, so that when the operator inputs these parameters, the complex calculation is already complete, reducing the operational complexity to simple parameter entry.
3Adaptability or versatility
If the lens is held by the lens holding shaft at a position other than the optic center, then the angle of the held lens changes, but it is difficult to form the hole of the target angle in the lens
Solution Approach 1:
The system implements feedback by detecting the actual holding position of the lens and using this information to adjust the hole angle calculation. The processor receives feedback about the lens position relative to the optic center and compensates for the resulting angle change, ensuring the hole is formed at the correct target angle regardless of holding position variations.
Solution Approach 2:
The system adopts a dynamic approach where the hole angle is not fixed but is dynamically adjusted based on the actual lens holding position. The processor calculates the appropriate angle modification in real-time according to the detected holding position, allowing the system to adapt to different holding scenarios while maintaining precision.
Data Source
AI summary
A spectacle lens processing device includes a drilling tool and a processor. The processor acquires a position of a hole formed in a lens and a pantoscopic angle. The pantoscopic angle is an angle in a vertical plane between a visual axis of a user and an optical axis of the lens when the user wears spectacles in which the lens after processing is mounted and faces forward. The processor determines, based on the acquired pantoscopic angle, a relative angle between the drilling tool and the lens when the hole is formed in the lens in the position of the hole.