Six-Lens Camera Optical Lens Aberration Correction
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Solution Overview
Problem
The demand for miniature camera optical lenses with excellent imaging quality and ultra-thin, wide-angle capabilities has increased, particularly for handheld devices like smartphones, but existing lenses struggle to fully correct chromatic aberrations and achieve optimal optical performance.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses with specific refractive powers and curvature radii, along with constraints on focal lengths, thicknesses, and curvature ratios, to achieve balanced spherical aberration, field curvature, and ultra-thin, wide-angle performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a three-piece or four-piece lens structure is used, then the device complexity is reduced, but the imaging quality and chromatic aberration correction are insufficient
Solution Approach 1:
The lens system is divided into six separate lens elements with specific refractive powers arranged in sequence. This segmentation allows each lens element to be optimized for specific optical functions, enabling comprehensive correction of chromatic aberrations and other optical defects while achieving high imaging quality that cannot be obtained with fewer elements.
2Volume of moving object
If the pixel area of photosensitive devices is reduced, then the device dimensions are reduced, but the imaging quality requirements become more stringent
Solution Approach 1:
The patent specifies precise parameter ranges for each lens element including focal length ratios (f1/f between 5.00-20.00), curvature radius ratios ((R7+R8)/(R7-R8) between 12.00-30.00), and thickness ratios (d1/TTL between 0.02-0.07). These controlled parameter changes enable the lens system to maintain excellent imaging quality while accommodating smaller pixel sizes and reduced device dimensions.
3Length of moving object
If an ultra-thin lens design is implemented, then the device thickness is reduced, but the optical performance and aberration correction are compromised
Solution Approach 1:
Different lens elements are assigned specific local optical functions based on their position in the sequence. The first lens (positive power) handles initial light convergence, the second lens (positive power) provides intermediate correction, the third lens (negative power) corrects chromatic aberrations, the fourth lens (negative power) provides further refinement, the fifth lens (positive power) enhances focal control, and the sixth lens completes the optical correction. This localized optimization of each element's properties enables ultra-thin design while maintaining superior optical performance.
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 effectively corrects on-axis and off-axis aberrations, achieving excellent optical characteristics and a wide field of view, making it suitable for high-pixel camera assemblies in mobile phones and web cameras.
Implementation Method 1
a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens having a positive refractive power, and a sixth lens
Data Source
AI summary
Provided is a camera optical lens including a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens having a positive refractive power, and a sixth lens. The camera optical lens satisfies: 5.00≤f1/f≤20.00; 12.00≤(R7+R8)/(R7−R8); and 2.00≤(R11+R12)/(R11−R12)≤8.00, where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; R7 and R8 denote curvature radiuses of an object side surface and an image side surface of the fourth lens, respectively; and R11 and R12 denote curvature radiuses of an object side surface and an image side surface of the sixth lens, respectively. The camera optical lens can achieve good optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.