Seven-Element Camera Lens Layout for Wide-Angle Thin Modules
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Solution Overview
Problem
Existing camera lenses for mobile devices struggle to achieve a balance between wide-angle, large aperture, and ultra-thin design while maintaining good optical performance due to unreasonable focal power, lens spacing, and lens shape.
Innovation Solution
A seven-piece camera optical lens design with specific refractive power and curvature radius conditions for each lens, including glass and plastic materials, optimized to meet the requirements of a wide-angle, large aperture, and ultra-thin structure, correcting aberrations and ensuring excellent imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seven-piece lens structure is used to achieve good optical performance, then imaging quality is improved, but the lens height and complexity increase, making it difficult to meet ultra-thin design requirements
Solution Approach 1:
The patent applies parameter changes by precisely controlling the focal lengths, curvature radii, and thickness ratios of each lens element. Specific conditional expressions are established (e.g., relationships between focal lengths of adjacent lenses, ratios of curvature radii) to optimize the optical path and reduce the total lens height while maintaining imaging quality. This allows the seven-piece lens to achieve ultra-thin profile without sacrificing optical performance.
2Ease of manufacture
If traditional lens structures are used to maintain simplicity, then manufacturing is easier, but optical performance and imaging quality deteriorate
Solution Approach 1:
The patent divides the optical system into seven distinct lens elements with specific refractive power configurations (positive and negative). Each lens element is designed with particular curvature radii and thickness parameters that can be independently controlled during manufacturing. This segmentation allows for standardized production processes while achieving complex optical functions that would be difficult with simpler structures.
3Reliability
If lens elements are made with larger curvature radii to reduce aberrations, then optical performance is improved, but the lens height and device thickness increase
Solution Approach 1:
The patent employs a composite lens structure combining seven different lens elements with varying refractive powers and material properties. By strategically arranging positive and negative lenses with specific curvature radii ratios, the system corrects optical aberrations through the combined effect of multiple elements rather than relying on single large-curvature surfaces. This composite approach enables aberration correction within a compact form factor.
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 lens achieves excellent optical performance with a wide-angle and ultra-thin design, suitable for mobile camera components and web cameras, with improved imaging quality and reduced sensitivity.
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, a fourth lens L4, a fifth lens L5 having a positive refractive power, a sixth lens L6 having a positive refractive power, and a seventh lens L7 having a negative refractive power
Data Source
AI summary
A 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; a fourth lens; a fifth lens with a positive refractive power; a sixth lens with a positive refractive power; a seventh lens with a negative refractive power. The camera optical lens satisfies the conditions of −8.00≤f2/f≤−2.50, 2.50≤(R5+R6)/(R5−R6)≤30.00 and R8/R7≤−1.50. The camera optical lens of the present disclosure has excellent optical performances, and meanwhile can meet design requirements of a wide-angle, a large aperture and ultra-thin.