Glass Optical Element Press Molding With Surface Treatment Atmosphere
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Solution Overview
Problem
Existing methods for producing borosilicate glass headlight lenses struggle to achieve high hydrolytic resistance and precise optical properties, particularly in terms of contour accuracy and surface quality, while maintaining weather resistance.
Innovation Solution
A method involving the use of a surface treatment agent comprising a solvent with an active solid, such as ammonium sulfate, is applied to the glass blank before and after press-molding, creating a treatment atmosphere to enhance the optical surfaces of the lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If borosilicate glass is used for headlight lenses, then hydrolytic resistance and weather resistance are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the chemical composition parameters of the glass from borosilicate to soda-lime silicate glass, maintaining hydrolytic resistance through controlled composition ranges (SiO2: 65-75 wt.%, Na2O: 10-20 wt.%, CaO: 5-15 wt.%) rather than relying on complex borosilicate formulations
Solution Approach 2:
The patent replaces expensive borosilicate glass with more economical soda-lime silicate glass, achieving comparable hydrolytic resistance through cost-effective alternative materials with optimized composition
2Manufacturing precision
If mechanical polishing is applied to improve surface quality, then surface roughness is reduced, but production time and complexity increase
Solution Approach 1:
The patent applies surface treatment with ammonium sulfate solution before press-molding, creating a preliminary surface modification that reduces roughness in advance, eliminating the need for subsequent mechanical polishing steps
Solution Approach 2:
The patent replaces mechanical polishing with a chemical surface treatment process using ammonium sulfate solution, substituting mechanical removal of material with chemical modification that achieves equivalent or superior surface quality
3Manufacturing precision
If mechanical polishing is used to achieve precise contour accuracy, then optical properties are improved, but production time increases
Solution Approach 1:
The surface treatment with ammonium sulfate is performed before press-molding, preliminarily preparing the glass surface to achieve optimal contour accuracy during molding, thereby eliminating time-consuming post-molding polishing operations
Solution Approach 2:
The patent skips the intermediate mechanical polishing step entirely by using chemical surface treatment that directly achieves the required contour accuracy and surface quality, streamlining the production process
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
The method achieves improved hydrolytic resistance and precise optical properties, ensuring low surface roughness and reducing the need for subsequent mechanical polishing, while maintaining the optical integrity of the lens.
Implementation Method 1
the surface treatment agent is evaporated to generate a treatment atmosphere
Implementation Method 2
a blank of transparent material is heated and/or provided and, after heating and/or after providing between a first mold and at least one second mold is press molded
Data Source
AI summary
The disclosure relates to a method for producing an optical element (202), wherein a blank of transparent material is heated and/or provided and, after heating and/or after being provided between a first mold (UF) and at least one second mold (OF), is press molded, for example on both sides, to form the optical element (202) and is then exposed to a treatment atmosphere.