Five-Lens Camera Optical Lens Design for Wide-Angle Aberration Correction
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Solution Overview
Problem
There is a need for a wide-angle camera optical lens with excellent optical characteristics, small size, and fully corrected aberrations to meet the increasing demands for high image quality in handheld devices and imaging systems, particularly with the shrinking pixel size of photosensitive devices.
Innovation Solution
A camera optical lens design comprising five lenses with specific refractive powers and curvature radii, optimized to achieve a large aperture, ultra-thin, and wide-angle performance, with conditions such as 1.20≤f1/f≤3.00, −8.00≤f5/f≤−2.00, and FOV≥102.7°, to balance field curvature, chromatism, astigmatism, and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-piece lens structure is used to improve image quality, then optical performance is improved, but device complexity increases
Solution Approach 1:
The optical lens system is divided into five distinct lens elements with specific refractive powers and curvature radii. Each lens element (first lens with positive refractive power, second lens with refractive power, third lens with negative refractive power, fourth lens with positive refractive power, and fifth lens with negative refractive power) is independently designed and positioned along the optical axis to collectively achieve superior image quality while maintaining manageable complexity through systematic segmentation.
2Volume of moving object
If the pixel area of the photosensitive device is reduced to achieve smaller device size, then device miniaturization is achieved, but image quality deteriorates
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including focal length ratios (f1/f between 1.20-3.00, f5/f between -8.00 to -2.00), curvature radius relationships ((R3+R4)/(R3-R4) between -1.00 to 0), and thickness ratios (d5/d6 between 3.00-10.00). These controlled parameter changes enable the optical system to maintain excellent image quality with reduced aberrations while being optimized for compact dimensions suitable for small pixel photosensitive devices.
3Length of moving object
If the optical lens is designed to be ultra-thin for portable appearance, then device portability is improved, but optical performance deteriorates
Solution Approach 1:
The patent employs dynamic optimization of lens element positions and thicknesses along the optical axis. The specific thickness ratio constraint (d5/d6 between 3.00-10.00) and distance relationships create a dynamically balanced optical path that achieves ultra-thin overall profile while maintaining proper light propagation and focusing characteristics. The alternating positive and negative refractive power elements dynamically compensate for each other to preserve optical performance in a compressed form factor.
4Area of moving object
If a wide-angle design is implemented to increase field of view, then imaging coverage is improved, but aberration correction becomes more difficult
Solution Approach 1:
The optical system uses a composite arrangement of five lens elements with alternating refractive powers (positive, refractive, negative, positive, negative). This composite structure combines different optical properties to achieve wide-angle coverage while the diverse refractive power distribution systematically corrects various aberrations including field curvature, chromatism, astigmatism, and distortion that typically worsen with wide-angle designs.
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 excellent optical performance with a large aperture, ultra-thin profile, and wide-angle capabilities, effectively correcting on-axis and off-axis aberrations, making it suitable for high-pixel CCD and CMOS camera lenses in mobile devices.
Implementation Method 1
a first lens having a positive refractive power
Implementation Method 2
a third lens having a negative refractive power
Implementation Method 3
a fifth lens having a negative 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 positive refractive power, a second lens having refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power. The camera optical lens satisfies the following conditions: 1.20≤f1/f≤3.00, −8.00≤f5/f≤−2.00, 3.00≤d5/d6≤10.00, and −1.00≤(R3+R4)/(R3−R4)≤0. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide angle, and ultra-thin.