Seven-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
Conventional camera optical lenses with seven-piece structures face challenges in achieving high optical performance while meeting requirements for ultra-thin, long-focal-length lenses with large apertures, due to irrational refractive power, lens spacing, and shape settings.
Innovation Solution
A seven-piece camera optical lens design with specific refractive power configurations and curvature radius relationships between its components, including a first lens with positive refractive power, a second lens with negative refractive power, and subsequent lenses with optimized focal lengths and on-axis distances, ensuring conditions such as 0.50≤f1/f≤0.80 and 1.50≤f6/f7≤5.00, which corrects aberrations and facilitates ultra-thin, long-focal-length imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seven-piece lens structure is used to improve imaging quality, then optical performance is improved, but the lens becomes thicker and more complex
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers, focal lengths, and spacing of each lens element. Specific conditions are imposed on focal length ratios (f1/f, f6/f7) and distance ratios (d4/d5) to optimize the optical performance of the seven-piece structure while managing its complexity
Solution Approach 2:
The lens system is segmented into seven distinct lens elements with specific positive and negative refractive powers. This segmentation allows each element to contribute differently to aberration correction and image quality enhancement, resolving the contradiction by making the complex structure functional rather than arbitrary
2Reliability
If lens refractive power and spacing are increased to achieve long focal length and large aperture, then optical performance is improved, but the lens thickness increases
Solution Approach 1:
The patent employs parameter changes by establishing specific ratio conditions for focal lengths (f1/f between 0.50-0.80, f6/f7 between 1.50-5.00) and spacing distances (d4/d5 between 1.20-2.00). These controlled parameter relationships enable long focal length and large aperture while constraining overall lens thickness
Solution Approach 2:
The patent transitions from considering only axial thickness to optimizing multiple dimensional parameters simultaneously - including radial aperture size, focal length, and various spacing dimensions. This multi-dimensional optimization allows achieving long focal length and large aperture without proportionally increasing thickness
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 achieves excellent optical characteristics, being ultra-thin and suitable for high-pixel camera assemblies in mobile phones and web cameras, with improved imaging quality and large aperture capabilities.
Implementation Method 1
a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, a third lens L3, a fourth lens L4 having a positive refractive power, a fifth lens L5 having a positive refractive power, a sixth lens L6 having a negative refractive power, and a seventh lens L7 having a negative refractive power
Data Source
AI summary
Provided is a camera optical lens, which includes, from an object side to an image side, first to seventh lenses. The camera optical lens satisfies following conditions: 0.50≤f1/f≤0.80; 1.50≤f6/f7≤5.00; and 1.20≤d4/d5≤2.00, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, f6 denotes a focal length of the sixth lens, f7 denotes a focal length of the seventh lens, d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens, and d5 denotes an on-axis thickness of the third lens. The camera optical lens according to the present disclosure can achieve high optical performance while satisfying design requirements for ultra-thin, long-focal-length lenses having large apertures.