Seven-Lens Imaging Optics for Thin Wide-Angle Camera Modules
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Solution Overview
Problem
The challenge of integrating high-resolution camera modules with imaging lens systems into thin portable electronic devices, such as smartphones, due to the increased size requirements of sensors and imaging planes, limits their mounting capabilities.
Innovation Solution
An imaging lens system design comprising a sequence of lenses with specific refractive powers and surface configurations, including concave and convex surfaces, that satisfy certain conditional expressions to optimize size and performance, allowing for high-resolution imaging within compact form factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of sensor and imaging plane is increased to achieve high resolution, then the resolution and resolving power are improved, but the size of camera module and imaging lens system increases
Solution Approach 1:
The imaging lens system is divided into seven distinct lens elements (first lens to seventh lens) with specific refractive powers and surface configurations. Each lens element contributes to the overall optical function, allowing the system to achieve high resolution while maintaining a compact form factor through distributed optical power management.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive power signs, surface curvatures (convex/concave configurations), and positional relationships. By optimizing these parameters within defined ranges, the system achieves high resolution imaging with a compact total length suitable for portable devices.
2Measurement precision
If the size of sensor and imaging plane is increased to achieve high resolution, then the resolution and resolving power are improved, but the mounting capability in thin electronic devices deteriorates
Solution Approach 1:
The seven-lens segmented design allows flexible spatial arrangement and integration into thin electronic devices. The division into multiple elements with specific optical powers enables the system to maintain high resolution while adapting to the thickness constraints of portable electronics through optimized lens spacing and curvature configurations.
Solution Approach 2:
The patent optimizes the lens system in the optical axis direction (thickness dimension) by carefully controlling the refractive powers and surface configurations of seven lens elements. This dimensional optimization allows the system to achieve high resolution imaging capability while reducing the overall thickness to enable mounting in thin electronic devices.
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 proposed lens system achieves a compact design suitable for portable devices while maintaining high resolution and image quality, adhering to conditional expressions that enhance optical performance.
Implementation Method 1
a first lens having negative refractive power; a second lens having positive refractive power; a third lens having a convex object-side surface; a fourth lens having a concave object-side surface; a fifth lens having positive refractive power; a sixth lens having a convex object-side surface; and a seventh lens having a refractive power, wherein the first to seventh lenses are sequentially arranged from an object-side to an imaging side
Data Source
AI summary
An imaging lens system is provided. The imaging lens system includes a first lens having a concave object-side surface; a second lens having positive refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having an Abbe number greater than 20 and less than 40; and a seventh lens having refractive power, wherein the first to seventh lenses are sequentially arranged from an object-side to an imaging side, and the imaging lens system satisfies the following conditional expressions: TTL/(ImgHT*2)<0.8, and 100°<FOV, where TTL is a distance from the object-side surface of the first lens to an imaging plane, ImgHT is a height of the imaging plane, and FOV is an angle of view of the imaging lens system.