Five-Lens Camera Optics Balancing Aberration and Thinness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to design a camera optical lens that achieves good optical performance, large aperture, wide-angle, and ultra-thin characteristics while correcting aberrations, suitable for miniaturized applications in devices like smartphones and digital cameras.
Innovation Solution
A five-lens structure with specific refractive powers and curvature radii ratios, including lenses made of plastic material, optimized for focal lengths, surface shapes, and total track length, to achieve balanced field curvature, reduced chromatic aberration, and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a multi-piece lens structure is used to improve imaging quality, then optical performance is improved, but device complexity and size increase
Solution Approach 1:
The optical lens system is divided into five separate lens elements with alternating positive and negative refractive powers. Each lens element is independently designed with specific curvature radii and thickness parameters to correct different types of optical aberrations, achieving comprehensive aberration correction while maintaining manageable structural complexity
Solution Approach 2:
Each lens element is assigned specific local optical properties: the first and fourth lenses have positive refractive power for converging light, while the second, third, and fifth lenses have negative refractive power for diverging light. The curvature radii and thickness of each element are locally optimized to address specific aberration issues at different positions in the optical path
2Volume of moving object
If the pixel area of light-sensitive devices is reduced for miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including focal length ratios (0.70≤f2/f≤1.10, 0.70≤R1/f1≤1.30), curvature radius ratios (5.50≤R7/R8≤14.00, 2.00≤(R5+R6)/(R5-R6)≤10.00), and thickness ratios (0.03≤d1/TTL≤0.12, 0.07≤d3/TTL≤0.28). These controlled parameter variations enable optimization of optical performance within miniaturized dimensions
Solution Approach 2:
The patent provides flexible parameter ranges rather than fixed values, allowing the optical system to be dynamically adjusted for different miniaturization requirements. The ratio-based specifications enable scaling of the entire system while maintaining optimal optical characteristics across different size regimes
3Illumination intensity
If aperture is increased for better light gathering, then imaging quality is improved, but lens complexity and aberration correction difficulty increase
Solution Approach 1:
The patent converts the harmful effect of large aperture-induced aberrations into a benefit by using the alternating positive-negative lens structure to systematically correct these aberrations. The negative refractive power lenses specifically counteract the spherical and chromatic aberrations introduced by the positive power lenses and large aperture, transforming what would be optical defects into opportunities for comprehensive aberration correction
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 lens design provides excellent optical characteristics, meeting the requirements for large aperture, wide-angle, and ultra-thin configurations, suitable for in-vehicle, cellular phone, and WEB camera lenses, with improved imaging quality and reduced sensitivity.
Implementation Method 1
a first lens L1 having a negative refractive power; a second lens L2 having a positive refractive power; a third lens L3 having a negative refractive power; a fourth lens L4 having a positive refractive power; a fifth lens L5 having a negative refractive power
Data Source
AI summary
The present disclosure discloses a camera optical lens having five lenses. The five lenses from an object-side to an-image side are: a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; which satisfies following conditions: 0.70≤f2/f≤1.10; 2.00≤(R5+R6)/(R5−R6)≤10.00; 0.70≤R1/f1≤1.30; 5.50≤R7/R8≤14.0. The camera optical lens can achieve good optical performance while meeting the design requirement for large aperture, long focal length and ultra-thin.