Spectacle Lens Decoration Alignment on 3D-Measured Optical Surfaces
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Solution Overview
Problem
The challenge in manufacturing spectacle lenses is to integrate decorative patterns with high precision and accuracy on the optical surface without compromising productivity, particularly in matching decoration data with primary functional data such as refractive power and ensuring comfortable vision.
Innovation Solution
A method involving laser beam irradiation with precise position control based on three-dimensional shape measurement, using a telecentric optical system and non-thermal processing to form decorative patterns on spectacle lenses, while maintaining the base material in a supported state and aligning reference points in a common coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laser beam irradiation is used to form decorative patterns on the optical surface, then appearance function and decorative value are improved, but positioning accuracy and alignment with functional data may deteriorate
Solution Approach 1:
The patent merges the decorative pattern formation process with the existing functional data handling system by integrating design pattern data with shape data in a common coordinate system. This allows the laser beam irradiation for decoration to be precisely aligned with the optical surface features defined by the functional data, ensuring both appearance quality and positioning accuracy are maintained simultaneously.
Solution Approach 2:
The patent implements feedback control by using the measured three-dimensional shape data of the optical surface to adjust and refine the positioning of the decorative pattern. The shape data provides feedback on the actual surface geometry, allowing the system to compensate for variations and ensure precise alignment of the decorative pattern with the optical features, thereby maintaining manufacturing precision while achieving the desired appearance function.
2Manufacturing precision
If three-dimensional shape measurement and position control are implemented for decorative pattern formation, then manufacturing precision is improved, but device complexity and processing time increase
Solution Approach 1:
The patent makes the measurement and control system multi-functional by using the same three-dimensional shape measurement data for both the primary function of defining the optical surface geometry and the secondary function of positioning decorative patterns. The common coordinate system serves multiple purposes: it defines the optical features from shape data and simultaneously positions the decorative pattern data, eliminating the need for separate measurement and positioning systems, thereby reducing overall device complexity while maintaining high manufacturing precision.
3Adaptability or versatility
If decorative data handling is added to the manufacturing process, then product value and appearance quality are improved, but productivity and manufacturing efficiency may deteriorate
Solution Approach 1:
The patent applies preliminary action by preparing and integrating the design pattern data with the shape data in the common coordinate system before the actual laser processing begins. All positioning calculations and coordinate transformations are performed in advance, so that during the laser beam irradiation process, the system only needs to execute the pre-calculated positioning commands, minimizing additional processing time and maintaining high manufacturing efficiency while achieving enhanced product value through precise decorative patterns.
4Manufacturing precision
If focus adjustment is performed based on three-dimensional shape measurement, then manufacturing precision is improved, but processing time and complexity increase
Solution Approach 1:
The patent ensures continuity of useful action by performing focus adjustment based on the three-dimensional shape measurement data without interrupting the overall manufacturing flow. The focus positions are calculated continuously from the shape data as the laser beam scans across the optical surface, allowing focus adjustment to occur seamlessly during the decorative pattern formation process rather than as a separate time-consuming step, thereby maintaining high manufacturing precision while minimizing time loss.
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 high-precision formation of decorative patterns at appropriate positions on spectacle lenses, ensuring accurate alignment and minimal thermal impact, thus enhancing appearance without affecting optical functionality.
Implementation Method 1
the decorative pattern is formed by removing a part of a surface layer portion of the surface to be treated by irradiation of the laser beam
Implementation Method 2
the surface to be treated is irradiated with laser beam via a telecentric optical system
Data Source
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AI summary
There is provided an optical member manufacturing method, which is a method for manufacturing an optical member having a decorative pattern formed on an optical surface, the method including: obtaining shape data that specifies an outer shape of the optical member and design pattern data that specifies a decorative pattern to be arranged within the outer shape (S206); measuring a three-dimensional shape of a surface to be treated of a base material that is a base of the optical member (S207); irradiating the surface to be treated of the substrate with laser beam to form a decorative pattern (S208); and processing the outer shape of the base material (S209), wherein the measurement of the three-dimensional shape of the base material, the formation of the decorative pattern, and the processing of the outer shape are performed while maintaining a base material supporting state by a jig block that supports the base material, and position control for forming the decorative pattern and position control for processing the outer shape are performed while a reference point set in a common coordinate system of the shape data and the design pattern data coincides with a reference point of the jig block that is in the base material supporting state.