Seven-Lens Camera Assembly Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wide-angle camera lens assemblies face challenges in achieving miniaturization, high imaging quality, and large field-of-view while maintaining a compact and lightweight design, as reducing the number of lenses compromises design freedom and image performance.
Innovation Solution
A camera lens assembly comprising seven lenses, with specific refractive powers and surface curvatures, where the effective focal lengths and surface ratios are optimized to balance aberrations, reduce system sensitivity, and enhance imaging quality, allowing for a compact and high-performance design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the number of lenses is reduced to achieve miniaturization, then the device size is reduced, but the design freedom and image performance deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive powers, focal lengths, and curvature radii of each lens element. Specifically, it sets the effective focal length ratio f1/f5 between 1.5-2.5 and the radius ratio R1/R2 between -0.5-0.5, along with optimizing thickness and spacing parameters, to achieve miniaturization while maintaining design freedom and image quality through precise parameter control rather than simply reducing lens count
Solution Approach 2:
The patent employs composite material principles by combining lenses with different refractive powers (positive and negative) and different material properties. The seven-lens configuration includes alternating positive and negative power elements with specifically selected glass materials having different Abbe numbers and refractive indices, creating a composite optical system that achieves compact size while maintaining high design flexibility and superior imaging performance
2Volume of moving object
If the number of lenses is reduced for miniaturization, then the device becomes more compact, but the imaging quality deteriorates
Solution Approach 1:
The patent optimizes imaging quality through precise parameter control, setting the effective focal length ratio f1/f5 between 1.5-2.5 and curvature radius ratio R1/R2 between -0.5-0.5, along with optimizing center thickness and spacing parameters for each lens element. This parameter optimization enables compact seven-lens design while achieving high imaging quality with balanced aberrations
Solution Approach 2:
The patent applies local quality by assigning different optical properties to different lens elements based on their specific positions and functions. Each of the seven lenses has specifically tailored refractive power, curvature radius, and thickness parameters optimized for its local role in the optical system, allowing compact design while maintaining high overall imaging quality through localized optimization
3Adaptability or versatility
If a wide-field-of-view is achieved, then more information is captured, but the lens assembly becomes longer
Solution Approach 1:
The patent achieves wide field-of-view in a compact form by optimizing the effective focal length ratio f1/f5 between 1.5-2.5 and curvature radius ratio R1/R2 between -0.5-0.5, along with optimizing thickness and spacing parameters. This parameter optimization enables the lens assembly to achieve 80 degrees or more field-of-view while maintaining compact length suitable for portable devices
Solution Approach 2:
The patent employs dynamic design principles by using aspherical surfaces with variable curvature throughout the lens elements. The aspherical shapes allow the optical system to dynamically adjust light path control across different field angles, achieving wide field-of-view coverage while maintaining compact overall length through efficient use of optical space
4Ease of manufacture
If all-glass structure is used for wide-angle lens, then manufacturing is simplified, but the lens assembly becomes longer and image quality is average
Solution Approach 1:
The patent optimizes the all-glass seven-lens configuration by precisely controlling the effective focal length ratio f1/f5 between 1.5-2.5, curvature radius ratio R1/R2 between -0.5-0.5, and thickness parameters. This parameter optimization achieves compact lens assembly length while maintaining manufacturing simplicity and high imaging quality with balanced aberrations
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 achieves a wide-angle, ultra-thin, high-image-quality camera lens assembly with balanced aberrations, suitable for portable electronic devices, by carefully allocating refractive powers and surface types across the lenses, thereby meeting the demands of miniaturization and high-resolution imaging.
Implementation Method 1
a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power, a third lens L3 having a positive refractive power, a fourth lens L4 having a positive refractive power, a fifth lens L5 having a positive refractive power, a sixth lens L6 having a negative refractive power and a seventh lens L7 having a negative refractive power
Data Source
AI summary
The present disclosure discloses a camera lens assembly includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The first lens has a positive refractive power. At least one of the second lens, the third lens, or the fourth lens has a positive refractive power or a negative refractive power. The fifth lens has a positive refractive power, and an image-side surface of the fifth lens is a convex surface. The sixth lens has a negative refractive power. The seventh lens has a negative refractive power, and an object-side surface of the seventh lens is a convex surface. An effective focal length f1 of the first lens and an effective focal length f5 of the fifth lens satisfy: 1.5<f1/f5<3.5.