Six-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
Current camera optical lenses with six-piece structures face challenges in achieving high optical performance while satisfying design requirements for wide-angle and ultra-thin lenses due to irrational refractive power settings, lens spacing, and shape, leading to issues with spherical aberration, field curvature, and off-axis aberration.
Innovation Solution
A six-piece camera optical lens design with specific refractive power and surface shape configurations for each lens, including aspherical surfaces, to balance spherical aberration, field curvature, and off-axis aberration, while optimizing lens thickness and focal lengths, ensuring a high image quality and wide-angle field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a six-piece lens structure is used to improve imaging quality, then optical performance is enhanced, but the lens becomes thicker and more complex
Solution Approach 1:
The lens system is divided into six distinct lens elements, each with specific refractive power and surface shape characteristics. This segmentation allows each element to correct specific types of aberrations, achieving high imaging quality while maintaining a manageable structure through functional division.
Solution Approach 2:
Different regions of the lens system are assigned different functions: the first and second lenses primarily correct spherical aberration, the third lens addresses field curvature, and the fourth through sixth lenses correct off-axis aberrations. This local quality differentiation optimizes the overall imaging performance without requiring uniform complexity throughout the entire lens structure.
2Reliability
If lens refractive power and spacing are increased to reduce aberration, then imaging quality improves, but lens thickness increases
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element, including refractive power ratios (e.g., -9.00 ≤ f2/f ≤ -6.00, 9.00 ≤ f2/f4 ≤ 13.00), curvature radius ratios (e.g., 11.00 ≤ (R3+R4)/(R3-R4) ≤ 20.00, 0.02 ≤ R7/R8 ≤ 0.30), and thickness ratios (e.g., 0.10 ≤ d5/TTL ≤ 0.20, 7.00 ≤ d1/d2 ≤ 10.00). These parameter optimizations enable effective aberration correction while controlling overall lens thickness.
Solution Approach 2:
The patent employs aspherical surfaces on multiple lens elements, defined by specific aspheric coefficient ranges (e.g., -1.00 ≤ k ≤ 2.00, -5.00 ≤ A4 ≤ 5.00, -2.00 ≤ A6 ≤ 2.00, -1.00 ≤ A8 ≤ 1.00). These curved surface designs enable more efficient aberration correction compared to spherical surfaces, allowing for reduced lens thickness while maintaining imaging quality.
3Adaptability or versatility
If lens structure is optimized for wide-angle field of view, then field of view increases, but optical performance deteriorates due to aberration
Solution Approach 1:
The patent assigns specific functional roles to different lens elements for correcting off-axis aberrations that arise in wide-angle designs. The fourth lens has negative refractive power with specific curvature ratios (0.02 ≤ R7/R8 ≤ 0.30) to control coma and astigmatism, while the fifth and sixth lenses further refine off-axis performance. This localized correction strategy enables wide-angle field of view while maintaining optical performance across the entire image field.
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 optical performance, correcting various aberrations and enabling ultra-thin lens structures with a wide field of view, effectively addressing the limitations of existing lens designs.
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 negative refractive power...
Data Source
AI summary
The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: an aperture; 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; and a sixth lens having a negative refractive power. The camera optical lens satisfies following conditions: −9.00≤f2/f≤−6.00; 9.00≤f2/f4≤13.00; 11.00≤(R3+R4)/(R3−R4)≤20.00; and 0.02≤R7/R8≤0.30.