Six-Lens Camera Optical Lens 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 aberration, particularly for handheld devices like smartphones and digital cameras, where the existing lens structures fail to meet the demands of improving imaging quality with smaller pixel sizes and diverse user requirements.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses with specific refractive powers and thickness ratios, along with an optical filter, to achieve a short total optical length, reduce aberration, and enhance imaging quality, while maintaining miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens structure uses more lens pieces (five-piece, six-piece, seven-piece) to improve imaging quality and correct aberration, then the imaging quality and aberration correction improve, but the total optical length increases and the lens becomes thicker
Solution Approach 1:
The lens system is divided into multiple lens pieces (six pieces in the patent) with different refractive powers and dispersion characteristics. Each lens piece is optimized to correct specific types of aberrations, allowing comprehensive aberration correction while maintaining a compact overall structure that would be difficult to achieve with fewer, larger elements.
Solution Approach 2:
Different lens pieces are assigned specific local functions: some pieces focus on correcting spherical aberration, others on coma, astigmatism, or chromatic aberration. The patent specifies different refractive indices and Abbe numbers for different lens pieces, optimizing each local region's optical properties to address specific aberration types while maintaining overall system compactness.
2Manufacturing precision
If the lens structure uses more lens pieces to correct aberration, then the aberration correction improves, but the device complexity increases
Solution Approach 1:
The complex aberration correction task is segmented across six lens pieces, each with optimized refractive power and dispersion characteristics. This segmentation allows systematic correction of different aberration types (spherical, coma, astigmatism, chromatic) while maintaining manageable individual element designs that can be manufactured with standard precision.
Solution Approach 2:
The patent optimizes multiple parameters simultaneously: refractive indices (nd ranging from 1.47 to 1.75), Abbe numbers (vd ranging from 20 to 60), thickness ratios (0.05 < d3/d5 < 0.40), and curvature radii for each lens piece. These parameter optimizations enable effective aberration correction while keeping the total optical length constrained (0.90 < TTL/f < 1.80), balancing complexity and performance.
3Adaptability or versatility
If the lens is designed for wide-angle application, then the field of view improves, but the optical characteristics and aberration correction become more difficult to maintain
Solution Approach 1:
The wide-angle field is segmented into different ray paths and field zones, with specific lens pieces optimized to correct off-axis aberrations (coma, astigmatism, field curvature) that become prominent in wide-angle applications. The patent achieves 80° or greater diagonal field of view while maintaining optical quality through this segmented correction approach.
Solution Approach 2:
Different lens pieces are optimized for different local functions: some pieces handle on-axis aberrations while others specifically address off-axis performance. The patent uses lens pieces with varying dispersion characteristics (different Abbe numbers) to correct lateral color and other off-axis chromatic effects that are particularly challenging in 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 characteristics by fully correcting on-axis and off-axis aberrations, resulting in a wide-angle, ultra-thin lens with improved imaging performance and a large aperture, suitable for handheld devices.
Implementation Method 1
The camera optical lens includes, from an object side to an image side: a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a negative refractive power, a fourth lens with a positive refractive power, a fifth lens with a negative refractive power, and a sixth lens with a positive refractive power
Data Source
AI summary
The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens and a sixth lens. The camera optical lens satisfies following conditions: 1.00≤f2/f3≤10.00 and 2.00≤d3/d5≤3.00, where f2 denotes a focal length of the second lens; f3 denotes a focal length of the third lens; d3 denotes an on-axis thickness of the second lens; and d5 denotes an on-axis thickness of the third lens. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.