Polyphosphonate Lens Material for Camera Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical materials for camera lenses, such as optical glasses and resins, face challenges with high manufacturing costs due to poor moldability and low productivity, especially when shaping aspherical lenses for aberration correction, which are necessary for advanced camera systems.
Innovation Solution
A polyphosphonate with a constitutional repeating unit containing a phosphate ester group directly bonded to an aromatic ring, formed through condensation polymerization, is used to create lenses with improved refractive index, transmissibility, and moldability, allowing for injection molding at high temperatures and enabling the production of high-quality camera lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If optical glass is used for lens production, then heat resistance and dimensional stability are improved, but manufacturing cost increases and moldability deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin material by incorporating specific phosphonate groups and aromatic rings, which changes the material's physical properties to achieve dimensional stability comparable to optical glass while maintaining moldability
Solution Approach 2:
The patent creates a composite resin material combining multiple chemical components (phosphonate groups, aromatic rings, and other optical additives) to achieve the desired balance of dimensional stability and moldability that neither component could provide alone
2Productivity
If transparent resin is used for lens production, then moldability and productivity are improved, but heat resistance and dimensional stability deteriorate
Solution Approach 1:
The patent changes the thermal and dimensional parameters of the resin through chemical modification with phosphonate groups and aromatic rings, raising the glass transition temperature and reducing thermal expansion to improve dimensional stability while maintaining the productivity benefits of resin molding
3Manufacturing precision
If high-tech processes are used to shape aspherical lenses, then optical performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent modifies the material's viscosity and molding characteristics through chemical composition adjustments, enabling aspherical lens shaping through standard injection molding processes without requiring expensive high-tech shaping equipment while maintaining optical precision
Solution Approach 2:
The patent replaces expensive, complex high-tech shaping processes with a simpler, more economical injection molding process that uses the specially formulated resin material to achieve the same optical results at lower cost
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 polyphosphonate lenses exhibit a refractive index of 1.57 or higher, transmissibility of 86% or more, and low APHA values, making them suitable for various optical applications, including camera modules, while being environmentally friendly and resistant to high temperatures, thus reducing manufacturing costs and improving optical properties.
Implementation Method 1
The polyphosphonate is formed by a condensation polymerization between an aromatic dihydroxy compound and a diphosphonic acid or its ester forming derivative
Data Source
AI summary
A polyphosphonate, a lens including the polyphosphonate, a camera module including the polyphosphonate lens, and a method of producing the lens are provided. The polyphosphonate includes a constitutional repeating unit comprising a phosphate ester group and an aromatic ring, and the phosphate ester group is directly bonded to the aromatic ring in the constitutional repeating unit.