Nine-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
Current camera optical lenses with a nine-lens structure struggle to achieve optimal optical performance for ultra-thin, wide-angle, and large-aperture designs, failing to meet the requirements for improved imaging quality and reduced thickness.
Innovation Solution
A camera optical lens configuration comprising nine lenses with specific refractive power distributions and curvature radii, optimized focal lengths, and thickness ratios to balance spherical aberration and field curvature, achieving a large aperture, wide angle, and ultra-thinness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional three-lens to six-lens structure is used, then the lens module is simpler and easier to manufacture, but it cannot achieve good imaging quality when pixel area is reduced
Solution Approach 1:
The optical system is divided into nine separate lens elements with specific positive and negative refractive powers. This segmentation allows each lens to be optimized for specific aberration correction, enabling high imaging quality with reduced pixel size while maintaining a manageable structural complexity through systematic arrangement.
Solution Approach 2:
Different lens elements are assigned specific refractive powers and curvature characteristics tailored to their positions in the optical path. The first lens has positive refractive power with specific curvature ratios, while subsequent lenses have varying powers to correct specific aberrations locally, achieving overall high imaging quality through localized optimization.
2Manufacturing precision
If a nine-lens structure is adopted to improve imaging quality, then optical performance is enhanced, but the lens thickness and overall dimension increase
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including focal length ratios (f1/f between 3.50-6.00), curvature radius ratios ((R1+R2)/(R1-R2) between -41.20 and -5.71), and thickness ratios (d1/TTL between 0.02-0.07). These parameter optimizations enable compact lens thickness while maintaining nine-lens structure for high imaging quality.
Solution Approach 2:
The lens design preemptively compensates for thickness issues by optimizing the spacing and curvature of each element. The specific curvature radius ratios and focal length distributions are designed to minimize the overall optical path length, preventing excessive thickness before it becomes a problem.
3Length of stationary object
If lens curvature and spacing are optimized for ultra-thin design, then thickness is reduced, but optical performance deteriorates
Solution Approach 1:
The patent establishes specific parameter ranges that simultaneously achieve ultra-thin design and high optical performance: focal length ratios (f7/f between 2.00-5.00), thickness ratios (d15/d16 between 1.50-9.00), and curvature ratios for all nine lenses. These parameter changes enable the system to be ultra-thin without sacrificing aberration correction capability.
Solution Approach 2:
The optical design allows dynamic adjustment of the balance between thickness and performance through the specified parameter ranges. The system can be optimized within these ranges to achieve different trade-offs between ultra-thin profile and optical performance depending on specific application requirements.
4Manufacturing precision
If aperture is increased for better light gathering, then imaging quality improves, but lens complexity and difficulty of aberration correction increase
Solution Approach 1:
The nine-lens segmented structure distributes the aberration correction task across multiple elements. Each lens handles specific aspects of aberration control, making it feasible to achieve large aperture (F-number considerations) with good imaging quality without excessive complexity in any single element.
Solution Approach 2:
Different lens elements are designed with specific local characteristics to handle different aspects of aberration correction. The first lens has specific curvature ratios for primary aberration control, while subsequent lenses address specific residual aberrations, enabling large aperture design with manageable complexity through localized functional specialization.
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 configuration effectively corrects aberrations and achieves excellent optical performance, meeting design requirements for large aperture, wide angle, and ultra-thinness, making it suitable for high-pixel camera applications.
Implementation Method 1
a first lens; a second lens having positive refractive power; a third lenses; a fourth lens; a fifth lens; a sixth lens; a seventh lens; an eighth lens; and a ninth lens
Data Source
AI summary
A camera optical lens is provided. 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, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The camera optical lens satisfies following conditions: 3.50≤f1/f≤6.00, and 1.50≤d15/d16≤9.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens is defined as f1, d15 denotes an on-axis thickness of the eighth lens, and d16 denotes an on-axis distance from an image side surface of the eighth lens to an object side surface of the ninth lens. The camera optical lens has a good optical performance, and meets design requirements of a large aperture, wide-angle and ultra-thinness.