Optical Imaging Lens Assembly Aberration Correction
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Solution Overview
Problem
The design of optical imaging lens assemblies for portable electronic products, such as smartphones, faces challenges in miniaturization while maintaining high imaging quality, as simply scaling down large lens assemblies does not result in equivalent performance.
Innovation Solution
An optical imaging lens assembly comprising seven lenses with specific refractive powers and surface configurations, including aspheric surfaces, is designed to achieve a compact, high-performance lens system with a large imaging plane, ultra-thinness, small distortion, and high imaging quality, by optimizing the refractive power and surface shape of each lens to reduce tolerance sensitivity and aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of a large lens assembly is scaled down, then the lens assembly size is reduced, but the imaging quality deteriorates
Solution Approach 1:
The lens assembly is divided into seven separate lens elements with specific refractive powers and surface configurations. Each lens element is optimized independently to contribute to the overall imaging performance, allowing the compact design to maintain high imaging quality despite the reduced total size.
Solution Approach 2:
Different lens elements are assigned different refractive powers (positive and negative) and surface configurations (convex and concave). The fifth lens specifically uses a concave object-side surface with optimized curvature radius to correct aberrations. This localized optimization of optical properties throughout the assembly maintains imaging quality in the miniaturized design.
2Manufacturing precision
If more lens elements are added to improve imaging quality, then the imaging performance is enhanced, but the device complexity increases
Solution Approach 1:
The patent optimizes specific parameter ranges for each lens element, including refractive powers, curvature radii, and thickness ratios. By constraining these parameters within specific ranges (e.g., f3/f>1.49, TTL/ImgH≤1.28), the design achieves high imaging quality with a manageable seven-element configuration, balancing performance and complexity.
3Adaptability or versatility
If the lens assembly is made ultra-thin for portable devices, then the adaptability to portable electronics is improved, but the aberration correction becomes more difficult
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements, including the fifth lens with its concave object-side surface. These curved and aspheric surfaces are strategically designed to correct spherical aberration, coma, and other optical aberrations within the ultra-thin form factor, enabling portable device integration without sacrificing imaging quality.
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 solution enables a compact optical imaging lens assembly with improved mass production feasibility, better correction of aberrations, and enhanced imaging performance, including a large field of view and reduced distortion, suitable for portable electronic products.
Implementation Method 1
a first lens having refractive power, an object-side surface thereof is a concave surface, and an image-side surface thereof is a convex surface; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power
Data Source
AI summary
The present disclosure discloses an optical imaging lens assembly, sequentially from an object side to an image side along an optical axis, including: a first lens having refractive power, an object-side surface thereof is concave, and an image-side surface thereof is convex; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power, and an object-side surface thereof is concave; a sixth lens having positive refractive power; and a seventh lens having refractive power. A total effective focal length f of the optical imaging lens assembly and an effective focal length f3 of the third lens may satisfy f3/f>1.49.