Six-Lens Camera Optical Lens Design for Aberration Correction
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Solution Overview
Problem
There is a growing demand for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices and imaging systems, where traditional lens structures fail to meet the requirements of miniaturization and improved imaging quality.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of plastic material with specific focal length and curvature radius ratios, refractive power distributions, and total optical length constraints to achieve ultra-thin and wide-angle capabilities while correcting aberrations and maintaining miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional three-piece or four-piece lens structure is used, then device complexity is reduced, but imaging quality deteriorates and chromatic aberration cannot be fully corrected
Solution Approach 1:
The optical system is divided into six separate lens elements with specific refractive power distributions (++-+−+), where each lens element is optimized to correct specific types of aberrations. This segmentation allows for comprehensive correction of chromatic and monochromatic aberrations while maintaining a compact form factor suitable for mobile devices.
2Manufacturing precision
If more lens elements (five-piece, six-piece, seven-piece) are added to improve imaging quality, then imaging quality improves, but total optical length increases and miniaturization becomes difficult
Solution Approach 1:
The patent employs specific parameter constraints including focal length ratios (4.50≤f1/f2≤8.00, 0.66≤f2/f≤2.41), curvature radius ratios, and refractive index selections to optimize the optical path. These parameter optimizations allow the six-element lens to achieve excellent imaging quality while keeping the total optical length controlled (TTL≤5.05mm), resolving the contradiction between quality and miniaturization.
3Length of stationary object
If ultra-thin design is implemented to meet miniaturization requirements, then total optical length is reduced, but optical characteristics deteriorate and aberration correction becomes difficult
Solution Approach 1:
The patent utilizes aspherical surfaces on multiple lens elements to dynamically adjust the optical path and correct aberrations within the ultra-thin form factor. The aspherical designs allow for flexible control of light rays throughout the compact optical system, maintaining excellent optical characteristics despite the reduced total optical length.
4Manufacturing precision
If six-piece lens structure with specific refractive power distribution is used, then chromatic aberration is fully corrected and imaging quality improves, but device complexity increases
Solution Approach 1:
Each lens element is designed with specific local properties including particular refractive indices, dispersion characteristics, and surface curvatures tailored to correct specific wavelength ranges and aberration types. This localized optimization of optical properties across the six elements enables comprehensive chromatic aberration correction while managing overall 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 design achieves high-performance, ultra-thin camera lenses with fully corrected on-axis and off-axis aberrations, maintaining miniaturization and enhancing imaging quality, suitable for handheld devices and imaging systems.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6... the first lens L1 has a positive refractive power, the second lens L2 has a positive refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a negative refractive power, and the sixth lens L6 has a positive refractive power
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 having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens and a sixth lens. The camera optical lens satisfies following conditions: 4.50≤f1/f2≤8.00 and −19.00≤(R1+R2)/(R1−R2)≤−13.00, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; R1 denotes a curvature radius of an object-side surface of the first lens; and R2 denotes a curvature radius of an image-side surface of the first lens. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.