Seven-Lens Camera Optical Lens Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected aberration, particularly for handheld devices and imaging systems, where the existing lens structures struggle to achieve both miniaturization and high imaging quality.
Innovation Solution
A seven-piece camera optical lens design is proposed, with specific refractive power and curvature radius conditions for each lens element, including a combination of plastic and glass materials, to achieve a short total optical length and correct aberrations, ensuring excellent imaging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to correct aberrations and improve imaging quality, then optical performance is improved, but the total optical length increases and the lens becomes less suitable for miniaturization
Solution Approach 1:
The optical system is divided into seven distinct lens elements with specific refractive power distributions. Each lens element (L1-L7) has carefully designed curvature radii and thickness ratios that segment the overall optical correction function, allowing aberration correction without requiring excessive total length. The segmentation of refractive power across multiple elements enables compact design while maintaining imaging quality.
Solution Approach 2:
The patent employs precise parameter control including specific focal length ratios (f1/f between 1.51-2.50, f3/f4 between -2.00 and 1.80), curvature radius relationships ((R1+R2)/(R1-R2) between -13.55 and -1.67), and thickness-to-total-length ratios (d1/TTL between 0.04 and 0.20). These parameter optimizations enable the lens to achieve compact dimensions while correcting optical aberrations effectively.
2Length of moving object
If the lens is miniaturized to meet thin and small dimension requirements, then device integration is improved, but aberration correction becomes more difficult and imaging quality deteriorates
Solution Approach 1:
The patent combines plastic and glass materials for different lens elements to achieve optimal aberration correction in a compact form. Specifically, the second lens L2 and fourth lens L4 use glass material with high refractive indices (n2 between 1.70-2.20, n4 between 1.70-2.20), while other elements use plastic. This composite material approach enables effective dispersion control and aberration correction within a miniaturized optical system.
Solution Approach 2:
The patent utilizes aspherical surface designs for multiple lens elements to enhance aberration correction in a compact configuration. The aspherical surfaces allow for more efficient light ray control compared to spherical surfaces, enabling better imaging quality within reduced optical length. Specific curvature radius relationships are established to optimize the aspherical surface performance.
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 design results in a compact, high-performance camera lens with fully corrected on-axis and off-axis aberrations, maintaining miniaturization characteristics and achieving excellent optical characteristics, suitable for wide-angle applications.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7... the second lens L2 and the fourth lens L4 are both made of glass material, and the other lenses are all made of plastic material
Data Source
AI summary
The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50, 1.70≤n2≤2.20, −2.00≤f3/f4≤1.80, −10.00≤(R13+R14)/(R13−R14)≤10.00 and 1.70≤n4≤2.20, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; f4 denotes a focal length of the fourth lens; n2 denotes a refractive index of the second lens; n4 denotes a refractive index of the fourth lens L4; R13 denotes a curvature radius of an object-side surface of the seventh lens; and R14 denotes a curvature radius of an image-side surface of the seventh lens.