Six-Lens Optical System Aberration Correction
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices fail to meet the requirements for high pixels and large aperture, particularly for micro filming and night viewing, due to limitations in increasing incoming light and improving imaging quality.
Innovation Solution
The use of a six-piece optical image capturing system with specific refractive powers, convex and concave surfaces, and inflection points on lens elements to enhance light collection and correct optical distortions, optimizing lens parameters such as focal lengths, entrance pupil diameters, and aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional four-lens or fifth-lens design is used, then device complexity is reduced, but imaging quality and light intake are insufficient for high-pixel and low-light requirements
Solution Approach 1:
The optical system is divided into six separate lens elements with specific refractive powers and surface configurations. Each lens element contributes to correcting specific aberrations and optimizing light transmission, with the first lens having positive refractive power and convex object-side surface, the second and third lenses having negative refractive power, and the fourth through sixth lenses having positive refractive power with specific concave and convex surface configurations
Solution Approach 2:
Different regions of the lens elements have different surface configurations optimized for their specific functions. The object-side and image-side surfaces of each lens element are designed with specific curvature radii and aspheric coefficients to locally optimize light transmission and aberration correction in different zones of the optical path
2Illumination intensity
If aperture size is increased to improve light intake, then imaging quality in low-light conditions improves, but device size increases which conflicts with miniaturization requirements
Solution Approach 1:
The system optimizes multiple parameters simultaneously: the focal length ratio f1/|f6| is controlled within 0.5 to 2.0, the ratio of effective pixel diagonal length to focal length is maintained between 0.8 and 2.0, and the back focal length is optimized to be 0.05 to 0.3 times the focal length. These parameter optimizations enable high light intake with a compact form factor suitable for portable devices
3Manufacturing precision
If more lens elements are added to correct aberrations, then imaging quality improves, but manufacturing complexity and alignment precision requirements increase
Solution Approach 1:
Each lens element is designed with specific parameter ranges that optimize aberration correction while maintaining manufacturability. The first lens has refractive power with focal length f1, the second and third have negative refractive powers with focal lengths f2 and f3, and the fourth through sixth have positive refractive powers with focal lengths f4, f5, and f6. The controlled parameter relationships (f1/|f6| between 0.5-2.0, sum of f2+f3+f4+f5 relative to f1 and f6) ensure effective aberration correction across the optical system
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 significantly improves imaging quality by increasing light intake and correcting aberrations, enabling better performance in high-pixel and low-light conditions, suitable for miniaturized electronic devices.
Implementation Method 1
an optical image capturing system, in order from an object side to an image side, includes a first, second, third, fourth, fifth and sixth lens elements with refractive power
Data Source
AI summary
A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power, a second lens with refractive power, a third lens with refractive power, a fourth lens with refractive power, a fifth lens with refractive power and a sixth lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.