Six-Lens Optical Assembly Aberration Correction
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Solution Overview
Problem
Conventional compact imaging lens assemblies for portable electronic devices, such as smartphones, struggle to achieve high image quality due to insufficient refractive power distribution and increased total track length, leading to issues with aberration and astigmatism.
Innovation Solution
The optical image capturing lens assembly is designed with a specific configuration of six lens elements, including a first lens with positive refractive power, a second with negative refractive power, a third, fourth, fifth, and sixth lens elements with aspheric surfaces, and a stop, where the radii of curvature and axial distances between surfaces are optimized to satisfy specific relations, effectively reducing spherical aberration, astigmatism, and total track length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality, then aberration correction capability is improved, but total track length increases
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive power distribution across lens elements and specifying precise radius of curvature relationships (R2/|R1| between -0.50 and -0.04) to correct aberrations while controlling total track length. The aspheric surface parameters are also optimized to achieve better image quality without proportionally increasing length
Solution Approach 2:
The first lens element is designed with dual functionality: its object-side surface provides positive refractive power for focusing light, while its image-side surface with specific curvature radius ratio contributes to aberration correction. This multi-functional design allows a single element to address multiple optical requirements simultaneously
2Length of moving object
If the refractive power of the first lens element is increased to reduce total track length, then compactness is improved, but spherical aberration increases
Solution Approach 1:
The patent controls the refractive power of the first lens element within specific bounds (f1/f between 0.30 and 0.60) and optimizes the radius of curvature ratio (R2/|R1| between -0.50 and -0.04) to balance compactness with aberration control. The aspheric surface parameters are adjusted to compensate for spherical aberration while maintaining the reduced track length
3Manufacturing precision
If the radius of curvature ratio R2/|R1| is optimized to correct aberration, then image quality is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a practical range for the radius of curvature ratio (R2/|R1| between -0.50 and -0.04) that balances aberration correction with manufacturability. The aspheric surface parameters are optimized within reasonable bounds to achieve good image quality without excessive manufacturing difficulty
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 configuration enhances image quality by correcting aberrations, reducing the total track length, and maintaining a compact form, suitable for high-end imaging in portable electronic products.
Implementation Method 1
a first lens element with positive refractive power; a second lens element with negative refractive power; a fifth lens element with positive refractive power; a sixth lens element with negative refractive power
Data Source
AI summary
The present disclosure provides an optical image capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex image-side surface; a second lens element; a third lens element; a fourth lens element, at least one of an object-side surface and an image-side surface thereof being aspheric; a fifth lens element, at least one of an object-side surface and an image-side surface thereof being aspheric; and a sixth lens element with negative refractive power having a concave image-side surface, at least one of an object-side surface and the image-side surface thereof being aspheric, at least one inflection point being formed on at least one of the surfaces thereof. With the aforementioned arrangements, the sensitivity of the optical system can be attenuated while the aberration and astigmatism can be effectively corrected to improve the image quality.