Double-Faced Semi-Finished Lens Blank Determination
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Solution Overview
Problem
The existing methods for producing ophthalmic lenses using semi-finished lens blanks require a large number of blanks to accommodate various wearer and frame data, leading to increased inventory and procurement costs.
Innovation Solution
A method to determine a 'double-faced' semi-finished lens blank with two defined faces, each capable of producing lenses for specific subsets of wearer and frame data, by calculating minimum thickness requirements and pairing faces to minimize thickness variations and optimize production logistics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple semi-finished lens blanks are used to accommodate various wearer and frame data, then the ability to produce lenses for different subsets of wearer and frame data is improved, but the number of blanks in inventory increases
Solution Approach 1:
The patent applies multi-functionality by creating semi-finished lens blanks with two defined faces, where each face can be used to produce lenses for different subsets of wearer and frame data. This allows a single blank to serve multiple production purposes, reducing the total number of blanks needed while maintaining the ability to accommodate various prescription requirements
Solution Approach 2:
The patent introduces a new dimension to lens blank design by defining two distinct faces on each blank, effectively doubling the productive capacity of each blank. This dimensional approach allows one blank to replace what would traditionally require multiple blanks, directly reducing inventory quantity while maintaining versatility
2Quantity of substance
If the number of semi-finished lens blanks is reduced, then inventory and procurement costs are decreased, but the ability to produce lenses for all wearer and frame data combinations may be compromised
Solution Approach 1:
By designing lens blanks with two defined faces, each capable of producing different lens types, the patent ensures that reduced inventory maintains full adaptability. The multi-functional design guarantees that fewer blanks are needed while still covering all required wearer and frame data combinations
3Quantity of substance
If semi-finished lens blanks with two defined faces are used, then the number of blanks needed is reduced by half, but the complexity of determining and managing the pairing of faces increases
Solution Approach 1:
The patent applies preliminary action by pre-determining the optimal pairing of faces on lens blanks during the design phase. This advance planning of face combinations and their corresponding thickness requirements simplifies subsequent manufacturing and inventory management, reducing the operational complexity despite the advanced design stage
Data Source
Figure 1A~1C
Figure 2A~2B
AI summary
The invention relates to a semi-finished lens blank having two defined faces assembled together, a first face being intended for producing lenses in a first subset of wearer data and/or frame data and a second face being intended for producing lenses in a second subset of wearer data and/or frame data. The number of semi-finished lens blanks for a given line can thus be reduced.