Six-Lens Camera Optical Lens with Alternating Refractive Powers
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Solution Overview
Problem
There is an urgent need for camera optical lenses with good optical performance, large aperture, wide angle, and ultra-thin designs to meet the increasing demands of miniaturized camera systems in handheld devices and other applications.
Innovation Solution
A camera optical lens design comprising six lenses, with specific refractive power and curvature radius conditions, including a first lens with positive refractive power, a second lens with negative refractive power, and subsequent lenses with alternating positive and negative refractive powers, optimized to achieve the desired optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-piece lens structure is used to improve imaging quality, then optical performance is improved, but device complexity increases
Solution Approach 1:
The optical lens system is divided into six individual lens elements with alternating positive and negative refractive powers. Each lens element is designed with specific curvature radii and thickness ratios to correct optical aberrations. The segmentation allows complex optical functions to be distributed across multiple simpler components, improving imaging quality while maintaining manufacturability
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element, including focal length ratios (e.g., 2.00≤f3/f≤6.00, −2.00≤f5/f6≤−0.79), curvature radius ratios (e.g., −5.00≤R7/R8≤−1.00, −0.90≤R9/R10≤−0.20), and thickness ratios (e.g., 0.25≤d2/d3≤1.00). These parameter constraints optimize optical performance while ensuring the lens assembly remains compact and suitable for handheld devices
2Volume of moving object
If the pixel area of light-sensitive devices is reduced to achieve miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The six-element lens structure distributes optical correction functions across multiple components, allowing each element to be optimized for specific aberration types. This segmentation enables high imaging quality to be achieved in a compact form factor suitable for miniaturized devices with small pixel sensors
Solution Approach 2:
The patent employs alternating positive and negative refractive powers across the lens elements, creating a three-dimensional optical path that efficiently corrects aberrations. This dimensional approach to optical design allows high-quality imaging to be achieved within the constrained volume of miniaturized devices
3Length of moving object
If the lens is designed to be ultra-thin to meet portable appearance requirements, then device thickness is reduced, but optical performance deteriorates
Solution Approach 1:
The patent specifies precise thickness ratios between lens elements (e.g., 0.25≤d2/d3≤1.00) and curvature radius ratios (e.g., −5.00≤R7/R8≤−1.00, −0.90≤R9/R10≤−0.20) to optimize the optical path within the constrained thickness. These parameter constraints ensure that each lens element contributes maximally to optical correction while maintaining an ultra-thin overall profile
Solution Approach 2:
The alternating positive and negative refractive powers create an efficient three-dimensional optical path that corrects aberrations within a thin profile. This dimensional optimization allows the lens assembly to achieve high optical performance despite the ultra-thin design requirement for portable devices
4Adaptability or versatility
If a wide-angle design is implemented to increase field of view, then angular coverage is improved, but optical aberrations increase
Solution Approach 1:
The six-element lens structure distributes wide-angle correction functions across multiple components. Elements with negative refractive powers (second, fourth, and sixth lenses) specifically address off-axis ray control and distortion, while positive power elements (first, third, and fifth lenses) provide focal convergence. This segmentation enables wide-angle performance with controlled aberrations
Solution Approach 2:
The patent specifies curvature radius ratios (e.g., −5.00≤R7/R8≤−1.00, −0.90≤R9/R10≤−0.20) and focal length ratios (e.g., −2.00≤f5/f6≤−0.79) that optimize the optical path for wide-angle applications. These parameter constraints control spherical aberration, coma, and distortion while maintaining a wide field of view suitable for handheld camera devices
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 designed camera optical lens achieves excellent optical characteristics, meeting the requirements for large aperture, wide-angle, and ultra-thin designs, making it suitable for applications in in-vehicle lenses, cellular phone camera lens assemblies, and web camera lenses.
Implementation Method 1
a first lens L1 having a positive refractive power; a second lens L2 having a negative refractive power; a third lens L3 having a positive refractive power; a fourth lens L4 having a negative refractive power; a fifth lens L5 having a positive refractive power; a sixth lens L6 having a negative refractive power
Data Source
AI summary
Disclosed is a camera optical lens. The camera optical lens includes from an object side to an image side in sequence: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a negative refractive power; wherein the camera lens satisfies the following conditions: 2.00≤f3/f≤6.00; −2.00≤f5/f6≤−0.79; −5.00≤R7/R8≤−1.00; −0.90≤R9/R10≤−0.20; 0.25≤d2/d3≤1.00. The camera optical lens has good optical performance, and can meet the design requirements for large aperture, wide-angle and ultra-thin.