Spectacle Lens Laser Marking for Reduced Workload
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Solution Overview
Problem
Existing methods for producing spectacle lenses using laser marking techniques require multiple marking steps and are costly due to the need for maintaining a laser irradiation device.
Innovation Solution
A method and system for producing spectacle lenses that involve marking an identification information mark and a processing information mark on the convex surface of a lens blank using laser, allowing for one-step marking and reducing the need for multiple laser irradiation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple marking steps are performed (marking after convex surface processing and marking after coating), then identification information and processing information can be accurately recorded, but production workload increases and laser irradiation device maintenance cost increases
Solution Approach 1:
The patent combines the marking of identification information and processing information into a single laser irradiation step performed on the convex surface before coating. This merging of marking operations eliminates the need for a second marking step after coating, thereby reducing production workload while maintaining marking accuracy through the use of a laser-readable mark that remains accessible after coating application.
2Adaptability or versatility
If multiple laser irradiation devices are used for different marking steps, then both identification and processing marks can be applied, but device maintenance cost increases
Solution Approach 1:
The patent designs a single laser irradiation device to perform multiple functions: marking both identification information and processing information on the convex surface. This universal approach allows one laser device to replace what would traditionally require multiple specialized marking devices, thereby reducing device maintenance costs while maintaining full marking capability throughout the production process.
3Ease of operation
If marks are made visible on the lens surface, then identification is easier, but the marks become noticeable and affect lens aesthetics
Solution Approach 1:
The patent applies local quality by creating marks with specific physical characteristics (holes or grooves) that are readable by laser equipment but remain substantially invisible to human observers. The marks are positioned and dimensioned to be functionally effective for automated identification while being aesthetically acceptable for the final lens product.
4Stability of the object's composition
If marking is performed after coating, then the mark is permanently fixed, but an additional marking step is required increasing production time
Solution Approach 1:
The patent performs the marking action preliminarily on the convex surface before the coating process is applied. By marking the lens while the convex surface is accessible and flat, the marking is established early in the production sequence. The subsequent coating process then covers and protects this pre-established mark, ensuring its permanence without requiring a separate post-coating marking step, thus eliminating additional production time.
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
This approach reduces the workload and cost associated with laser marking, while ensuring accurate processing and identification of spectacle lenses, even after coatings are applied.
Implementation Method 1
marking an identification information mark and a processing information mark by forming a hole or a groove in a convex surface of the lens material by laser
Data Source
AI summary
A method for producing a spectacle lens from a lens material and includes: a marking step of marking an identification mark for identifying the spectacle lens, and a processing information mark which is used to process a lens blank and includes a tray identification 2D code, a tray identification code, a shape line and a position mark by forming a hole or a groove in a convex surface of the lens material by laser; and a concave surface machining processing step of reading the processing information mark, and machining a concave surface of the lens blank based on the read processing information mark.