Laminated Glass Optical Power Simulation Method
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Solution Overview
Problem
Current methods for simulating the optical quality of laminated glass are inefficient in anticipating the technical difficulties of manufacturing specific shapes with desired optical quality, leading to production losses and unnecessary use of higher-quality glass sheets, which is both time-consuming and economically irrelevant.
Innovation Solution
A computer-based simulation method that models the geometric and optical properties of laminated glass by calculating the geometric and topological thickness of glass sheets, allowing for the determination of the minimum optical quality required for glass sheets to achieve a given shape and optical quality constraint, significantly reducing production losses and time by enabling real-time assessment of optical power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current simulation methods (ray tracing) are used to evaluate optical quality, then optical accuracy is maintained, but computation time is excessively long and cannot support real-time manufacturing decisions
Solution Approach 1:
The patent creates a simplified mathematical model that copies the essential optical behavior of laminated glass without requiring complex ray tracing simulations. By representing the glass stack with equivalent optical parameters (curvatures, thicknesses, refractive indices), the system reproduces optical quality results much faster while maintaining sufficient accuracy for manufacturing decisions.
Solution Approach 2:
The patent transforms the optical evaluation problem from a complex geometric ray-tracing task into a parameter-based calculation system. By changing the representation from detailed 3D geometry to simplified optical parameters (curvatures C1, C2, thicknesses e1, e2, refractive indices n1, n2), the computation becomes significantly faster while preserving the essential optical characteristics needed for quality assessment.
2Manufacturing precision
If higher optical quality glass sheets are used for all laminated glass productions, then optical quality constraint is satisfied, but material cost increases and production efficiency decreases
Solution Approach 1:
The patent performs preliminary optical quality assessment through fast simulation before actual production begins. By calculating the expected optical quality of the final laminated glass based on candidate glass sheet combinations, the system identifies suitable combinations in advance, preventing waste of time and materials on unsuitable combinations and enabling efficient production planning.
Solution Approach 2:
The patent applies different optical quality requirements to different regions and applications of laminated glass. Rather than uniformly requiring high optical quality for all productions, the system determines the minimum necessary optical quality based on the specific application (windshield, side window, decorative glass), allowing optimization of glass sheet selection for each case and improving overall production efficiency.
3Ease of manufacture
If heuristic approach with experimentation is used to determine required optical quality, then practical manufacturing experience is gained, but production losses occur and time consumption increases
Solution Approach 1:
The patent performs preliminary virtual experimentation through fast optical simulation before actual production. By testing different glass sheet combinations and configurations in silico, the system identifies optimal combinations without physical trial-and-error, eliminating production losses associated with experimental failures while building a database of practical manufacturing knowledge for future reference.
Data Source
AI summary
A simulation method, implemented by computer, simulates the optical power of a laminated glass of given shape liable to be obtained by laminating at least two glass sheets and at least one lamination interlayer, the laminated glass being liable to have an edge, a first main face, and a second main face. The method is suitable for determining a minimum value of optical quality index which a combination of glass sheets must satisfy so as to form a laminated glass of given shape with a given optical quality constraint.