Seven-Lens Imaging Optics for High Resolution in Thin Devices
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Solution Overview
Problem
The challenge of integrating high-resolution camera modules and imaging lens systems into thin portable electronic devices, such as smartphones, is due to the proportional increase in size requirements that conflict with the compact form factor of these devices.
Innovation Solution
An imaging lens system is designed with specific lens configurations and refractive properties, including lenses with concave and convex surfaces, and adherence to conditional expressions that optimize size and performance, allowing for high-resolution imaging within a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor and imaging plane size are increased to achieve high resolution, then the resolution and resolving power are improved, but the camera module and imaging lens system size increases, making it difficult to mount in thin electronic devices
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices and Abbe numbers of lens materials. Specifically, the sixth lens has an Abbe number between 20-40, and the conditional expressions involving refractive indices (n1, n2, n3, n4, n5, n6) and Abbe numbers (v1, v2, v3, v4, v5, v6) are carefully controlled to achieve compact design while maintaining high resolution imaging performance
Solution Approach 2:
The imaging lens system is divided into seven distinct lens elements, each with specific refractive power and surface characteristics. This segmentation allows each lens to contribute differently to the overall optical performance, enabling compact design while achieving high resolution through distributed optical functions across multiple elements
2Measurement precision
If the sensor and imaging plane size are increased to achieve high resolving power, then the resolving power is improved, but the camera module and imaging lens system length increases, conflicting with the thin form factor requirement
Solution Approach 1:
The patent uses parameter changes by controlling the Abbe number of the sixth lens between 20-40 and satisfying specific conditional expressions involving refractive indices and Abbe numbers of all seven lenses. This optimization allows the system to achieve high resolving power while maintaining a compact length suitable for thin electronic devices
Solution Approach 2:
The imaging lens system is designed to perform multiple functions within a compact structure. The seven-lens configuration with specific refractive powers and surface characteristics enables the system to achieve both high resolving power and compact form factor, making it universally applicable to thin electronic devices like smartphones
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, addressing the size constraints of thin electronic devices.
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.