Five-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
There is an urgent need for a wide-angle imaging lens with excellent optical characteristics, small size, and fully corrected aberrations, particularly for handheld terminal devices and imaging devices where miniaturization and high image quality are essential.
Innovation Solution
A camera optical lens comprising five lenses, arranged from object side to image side with specific refractive powers and surface curvatures, satisfying conditions such as 12.00≤TTL/f≤15.00, 2.00f45/f6.00, and 0(R3+R4)/(R3−R4)<1.00, which ensures optimal optical performance, miniaturization, and correction of aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-piece lens structure is used to improve image quality, then optical characteristics are improved, but device complexity increases
Solution Approach 1:
The lens system is divided into five separate lens elements with different refractive powers (negative, negative, positive, negative, positive), each segment contributing to correcting specific optical aberrations while working together to achieve excellent overall optical characteristics
Solution Approach 2:
Each lens element is designed with specific local optical properties - the first and second lenses have negative refractive power to control distortion, the third lens has positive refractive power for focusing, and the fourth and fifth lenses have negative and positive refractive powers respectively to correct chromatic aberration and other optical defects
2Volume of moving object
If pixel size is reduced to enable miniaturization, then device size is reduced, but image quality deteriorates
Solution Approach 1:
The lens design uses specific parameter relationships (TTL/f ratio between 12.00-15.00, f45/f ratio between 2.00-6.00, curvature radius ratios) to optimize the optical path and light distribution, ensuring excellent image quality is maintained even with reduced pixel size and compact lens structure
3Reliability
If aperture is increased to improve light gathering ability, then optical performance is improved, but distortion increases
Solution Approach 1:
The lens system segments the optical path into five stages with different refractive powers, where the negative refractive power lenses (first, second, and fourth lenses) specifically work to counteract distortion while the positive refractive power lenses (third and fifth lenses) maintain focus and optical performance
Solution Approach 2:
The lens elements have asymmetric curvature configurations - for example, the first lens has different curvature radii on object and image sides (R1, R2), and the fourth lens has asymmetric curvatures (R7, R8) - which allows the system to achieve wide aperture while minimizing distortion through asymmetric light path correction
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 performance with a large aperture, long focal length, and low distortion, making it suitable for high-pixel imaging elements in handheld devices while maintaining a compact size and correcting aberrations effectively.
Implementation Method 1
a first lens having a negative 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, and a fifth lens having a positive refractive power
Data Source
AI summary
The present invention discloses a camera optical lens including, from an object side to an image side in sequence: a first lens having a negative 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, and a fifth lens having a positive refractive power. The camera optical lens satisfies the following conditions: 12.00≤TTL/f≤15.00, 2.00≤f45/f≤6.00, 0≤(R3+R4)/(R3−R4)<1.00, and 8.00≤d4/d6≤30.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide angle, and ultra-thin.