Nine-Lens Camera Optical Lens Design for Wide-Angle Imaging
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Solution Overview
Problem
Current camera lenses for portable devices face challenges in achieving optimal optical performance for large aperture, ultra-thinness, and wide-angle capabilities due to unreasonable refractive power, lens spacing, and shape settings.
Innovation Solution
A camera optical lens design comprising nine lenses, with specific refractive power distributions and curvature radius conditions, including 4.00≤f1/f≤7.00 and 3.00≤d5/d6≤12.00, to balance spherical aberration and field curvature, while ensuring ultra-thinness and wide-angle capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nine-piece lens structure is adopted to improve imaging quality, then optical performance is improved, but lens complexity increases and manufacturing difficulty rises
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive power distribution (f1/f ratio), lens spacing (d5/d6 ratio), and curvature radius relationships (R12/R11, (R1+R2)/(R1-R2)) of each lens element. These parameter optimizations enable the nine-piece lens to achieve superior imaging quality while maintaining manufacturability through standardized design ratios
2Illumination intensity
If lens refractive power and spacing are increased to achieve large aperture, then aperture size is improved, but lens thickness increases
Solution Approach 1:
The patent applies local quality by assigning different refractive power characteristics to different lens elements (L1-L9) based on their specific positions and functions. Each lens has optimized curvature radii (R1-R18) and thickness ratios (d1/TTL, d3/TTL, d5/TTL) tailored to its local optical role, enabling large aperture achievement without proportional increase in overall lens thickness
3Area of stationary object
If lens curvature radius is adjusted to achieve wide angle, then field of view is improved, but optical aberration increases
Solution Approach 1:
The patent applies segmentation by dividing the wide-angle optical correction task across nine separate lens elements (L1-L9), each with specifically designed curvature radii. The curvature radius ratios (R12/R11 for L6, (R3+R4)/(R3-R4) for L2, (R5+R6)/(R5-R6) for L3) are optimized to distribute aberration correction responsibilities, enabling wide field of view while maintaining manufacturing precision
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 design achieves excellent optical performance with a large aperture and wide angle, suitable for high-pixel CCD and CMOS camera elements, effectively correcting on-axis and off-axis chromatic aberrations.
Implementation Method 1
a second lens L2 having a positive refractive power
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: 4.00≤f1/f≤7.00, and 3.00≤d5/d6≤12.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, d5 denotes an on-axis thickness of the third lens, and d6 denotes an on-axis distance from an image side surface of the third lens to an object side surface of the fourth lens. The camera optical leans according to the present disclosure has better optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.