Thermoplastic Resin Composition for Optical Lenses
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Solution Overview
Problem
Current optical systems in miniaturized imaging modules face challenges with chromatic aberration, requiring materials with high refractive index, low haze, low birefringence, excellent heat resistance, and moldability, which existing thermoplastic resins fail to provide efficiently.
Innovation Solution
A thermoplastic resin composition comprising specific units represented by formulas (1) and (2), with a mass ratio of 1:99 to 99:1, achieving a refractive index of 1.645 to 1.690, orientation birefringence of 4.5×10−3 or less, and Charpy impact strength of 25 J/m2 or more, while maintaining low haze and water absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a polycarbonate resin composition is designed to achieve high refractive index, then chromatic aberration correction improves, but manufacturing complexity and material selection difficulty increase
Solution Approach 1:
The patent employs composite materials by combining polycarbonate resin with specific polyester resin components (formula 1) and optional auxiliary resins (formula 2) in controlled ratios. This composite approach enables achieving high refractive index (1.59-1.67) and appropriate Abbe number (20-35) simultaneously, resolving the contradiction between optical performance and material complexity through systematic composition design rather than relying on single complex materials
Solution Approach 2:
The patent applies parameter changes by precisely controlling the compositional parameters - specifically setting the polycarbonate resin content at 90-99 mass%, polyester resin (formula 1) at 1-10 mass%, and optionally formula (2) resin at 0.1-10 mass%. By adjusting these parameters within defined ranges, the refractive index and Abbe number can be tuned to achieve optimal chromatic aberration correction while maintaining manageable material complexity
2Manufacturing precision
If resin composition is optimized for high refractive index and low haze, then optical clarity improves, but moldability and heat resistance balance deteriorates
Solution Approach 1:
The patent uses parameter changes to optimize the balance between optical clarity and manufacturability. By controlling the polyester resin (formula 1) content at 1-10 mass% and optionally formula (2) resin at 0.1-10 mass%, the composition achieves haze ≤5% while maintaining moldability and heat resistance. The specific parameter ranges ensure that optical properties are improved without compromising processing characteristics
Solution Approach 2:
The patent applies local quality by introducing specific resin components with targeted properties - polyester resin (formula 1) provides low haze and high transparency, while the polycarbonate base maintains structural integrity and heat resistance. The optional formula (2) resin locally enhances specific optical properties. This localized functional assignment within the composite enables simultaneous achievement of optical clarity and manufacturability
3Volume of moving object
If imaging module size is reduced, then device miniaturization achieves, but chromatic aberration increases
Solution Approach 1:
The patent applies parameter changes by using resin composition to alter the optical properties of the lens material. The specific composition (polycarbonate 90-99 mass%, polyester formula (1) 1-10 mass%, optional formula (2) 0.1-10 mass%) achieves refractive index 1.59-1.67 and Abbe number 20-35, enabling effective chromatic aberration correction in miniaturized lenses where traditional materials would fail
Solution Approach 2:
The patent uses composite materials to achieve the required optical performance in small-sized lenses. By combining multiple resin components with complementary properties, the composition achieves both high refractive index (for compact lens design) and appropriate Abbe number (for chromatic aberration correction), resolving the contradiction between miniaturization and optical quality
Data Source
AI summary
A thermoplastic resin composition comprising a thermoplastic resin (A) containing a unit represented by formula (1) and a thermoplastic resin (B) containing a unit represented by formula (2), wherein in the formula (1), L1 and L2 each independently represent a divalent linking group, k and 1 each independently represent an integer of 0 or more, R1, R2, R3, and R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and W represents a divalent linking group; and in the formula (2), L3 and L4 each independently represent a divalent linking group, m and n each independently represent an integer of 0 or more, and R5, R6, R7, and R8 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.