Nine-Lens Camera Optical System for Large Aperture and Ultra-Thinness
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Solution Overview
Problem
Current camera lenses for portable devices face challenges in achieving both large aperture and ultra-thinness while maintaining good optical performance, particularly in meeting design requirements for ultra-thin, wide-angle lenses with high pixel density.
Innovation Solution
A camera optical lens design comprising nine lenses, with specific refractive power and curvature radius conditions, including a range of negative and positive refractive powers, and optimized lens spacings and thicknesses, to balance spherical aberration and field curvature, achieving a large aperture and ultra-thin structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nine-piece lens structure is used to improve imaging quality, then optical performance is improved, but device thickness increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers (f1/f, f2/f, f3/f ratios) and curvature radii (R1/R2, R3/R4, etc.) of each lens element. The nine-piece structure uses specific parameter ranges for each component to optimize the overall optical path, allowing high imaging quality to be achieved while maintaining a compact form factor suitable for portable devices.
2Illumination intensity
If lens elements are added to achieve large aperture, then aperture size is improved, but structural complexity increases
Solution Approach 1:
The patent segments the optical system into nine distinct lens elements with alternating positive and negative refractive powers. This segmentation allows each element to be optimized for specific optical functions (correcting spherical aberration, controlling field curvature, managing chromatic aberration), enabling large aperture design while distributing complexity across multiple specialized components rather than requiring a single complex element.
Solution Approach 2:
Each lens element in the nine-piece structure possesses locally optimized properties - specific refractive powers, curvature radii, and thickness ratios tailored to its position and function in the optical path. For example, the second lens has negative refractive power specifically to correct certain aberrations, while the fifth lens has positive power for a different correction function, allowing the system to achieve large aperture with controlled complexity through localized optimization.
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 effectively corrects on-axis and off-axis chromatic aberrations, providing excellent optical performance and meeting the requirements for large aperture and ultra-thinness, making it suitable for high-pixel CCD and CMOS camera elements.
Implementation Method 1
a first lens, a second lens having a negative refractive power, a third lens, 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 negative 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: 0.80≤f1/f≤1.80; and 1.50≤d3/d4≤8.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d3 denotes an on-axis thickness of the second lens, and d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens. The camera optical lens according to the present disclosure meets design requirements for large aperture and ultra-thinness while achieving good optical performance.