Five-Lens Mobile Camera System Aberration Control
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Solution Overview
Problem
Conventional camera lens systems for mobile devices, such as smartphones and tablets, fail to meet the demand for compact, high-resolution, and high-performance imaging lenses, as they typically use four or five lenses systems that do not adequately address the need for better image quality and compact size.
Innovation Solution
An optical lens system comprising five lenses, with specific focal powers and surface curvatures, including a first lens with positive and concave surfaces, a second lens with negative power, a third lens with negative power, a fourth lens with positive and concave surfaces, and a fifth lens with negative power and concave surfaces, optimized by conditional expressions to achieve compact dimensions and reduced distortion, while maintaining high resolution and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional four or five lenses system is used, then the device complexity is reduced, but the image quality and resolution are insufficient
Solution Approach 1:
The lens system is divided into five distinct lens elements with specific focal powers and surface curvatures. Each lens element (first lens with positive focal power, second lens with negative focal power, third lens with negative focal power, fourth lens with positive focal power, and fifth lens with negative focal power) is optimized independently to correct specific optical aberrations, thereby improving overall image quality while maintaining manageable system complexity
Solution Approach 2:
Different regions of the lens system are assigned different optical properties. The first lens has a convex object-side surface and concave image-side surface, while the fourth lens has concave object-side surface and convex image-side surface. Each lens element's curvature and focal power are locally optimized to address specific aberration problems in different parts of the optical path
2Manufacturing precision
If more lenses are added to improve image quality, then the manufacturing precision is improved, but the device size increases
Solution Approach 1:
The five lens elements are arranged in a compact nested configuration along the optical axis, with each subsequent lens positioned closely to the previous one. This nested arrangement allows the lens module to achieve high image quality with five elements while minimizing the overall axial length and volume of the lens assembly
Solution Approach 2:
The lens system optimizes the axial distribution of the five lens elements to achieve compact dimensions. By carefully controlling the axial distances between lenses and their respective curvatures, the system achieves high resolution in a compact form factor suitable for mobile devices
3Volume of moving object
If compact lens system is designed, then the volume is reduced, but the optical performance and resolution deteriorate
Solution Approach 1:
The lens system employs specific parameter relationships to achieve compact size while maintaining optical performance. The conditional expressions define optimal ranges for focal lengths (f1, f2, f3, f4, f5), curvature radii (R1-R8), and axial distances (T1-T4) that balance compactness with image quality. For example, the first lens has positive focal power with specific convex-concave surface configuration, and the fifth lens has negative focal power with concave image-side surface, all optimized within defined parameter ranges
4Manufacturing precision
If five lenses system with specific configurations is used, then the image quality is improved, but the device complexity increases
Solution Approach 1:
The five-lens system is designed with each element serving multiple functions. The first lens (positive focal power) and fourth lens (positive focal power) work together to provide overall focusing, while the second, third, and fifth lenses (all negative focal power) collectively correct various aberrations. This multi-functional design achieves superior image quality without proportionally increasing system complexity
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 optical lens system achieves a compact and high-performance imaging solution with improved image quality, reduced distortion, and balanced optical aberrations, meeting the requirements for modern mobile devices by adhering to specific focal length and curvature relationships and axial distances between lenses.
Implementation Method 1
an optical lens system which comprises an optical lens system for forming a subject image on a photoelectric conversion section of a solid image pickup element
Data Source
AI summary
An optical lens system for forming a subject image on a photoelectric conversion section of a solid image pickup element and an image pickup lens includes, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has a positive focal power with a convex surface on an object side thereof and a concave surface on an image side thereof. The second lens has a negative focal power. The third lens has a negative focal power. The fourth lens has a positive focal power with a concave surface on an object side thereof and a convex surface on an image side thereof. The fifth lens has a negative focal power with a concave surface on an image side thereof.