Six-Element Camera Lens Design for Miniaturization and Aberration Correction
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Solution Overview
Problem
There is a need for ultra-thin wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration, particularly for handheld devices like smartphones and digital cameras, where existing lens structures struggle to achieve both miniaturization and high imaging quality.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising specific plastic lenses with controlled refractive powers and curvature radii, optimized to achieve a short total optical length, low distortion, and effective aberration correction, ensuring ultra-thin and wide-angle performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens structure uses three-piece or four-piece design, then the device complexity is reduced, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens is divided into six separate lens elements (first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6), each with specific refractive power and curvature characteristics. This segmentation allows independent optimization of each element to correct various aberrations including chromatic aberration, while achieving high imaging quality that cannot be obtained with fewer elements.
2Manufacturing precision
If the lens structure uses five-piece, six-piece or seven-piece design, then the imaging quality and chromatic aberration correction are improved, but the total optical length increases
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including refractive power ratios (f1/f, f2/f, f3/f, f4/f, f5/f, f6/f), curvature radius ratios (R1/R2, R3/R4, R5/R6, R7/R8, R9/R10, R11/R12), and thickness ratios (d1/TTL, d2/TTL, d3/TTL, d4/TTL, d5/TTL, d6/TTL). These parameter optimizations enable the six-piece lens to achieve excellent chromatic aberration correction and high imaging quality while maintaining an ultra-thin total optical length suitable for portable devices.
3Adaptability or versatility
If the lens is designed for wide-angle application, then the field of view is increased, but the optical characteristics and aberration correction become more difficult to maintain
Solution Approach 1:
Each lens element is designed with specific local characteristics: the first lens L1 has positive refractive power with convex object-side surface, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power with convex object-side surface, the fourth lens L4 has negative refractive power with concave object-side surface, the fifth lens L5 has positive refractive power with convex object-side surface, and the sixth lens L6 has negative refractive power with concave object-side surface. This local quality differentiation across elements enables effective correction of wide-angle aberrations while maintaining high imaging quality across the expanded field of view.
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 characteristics, including full correction of on-axis and off-axis chromatic aberrations, maintaining miniaturization while providing high imaging quality and a wide field of view.
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 arranged in sequence from an object side to an image side along an optical axis
Implementation Method 2
The design achieves excellent optical characteristics, including full correction of on-axis and off-axis chromatic aberrations
Data Source
AI summary
The present disclosure relates to optical lens, in particular to a camera optical lens, comprising, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; the second lens has a negative refractive power, and the third lens has a positive refractive power; wherein the camera optical lens satisfies the following conditions: 1.30≤f1/f≤2.00; 13.00≤R7/d7≤16.00, where, f denotes a focus length of the camera optical lens; f1 denotes a focus length of the first lens; R7 denotes a curvature radius of an object side surface of the fourth lens; and d7 denotes an on-axis thickness of the fourth lens. The camera optical lens may obtain high imaging performance and a low TTL.