Eight-Lens Imaging Layout for High-Resolution Thin Camera Modules
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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, due to the proportional increase in size with sensor and imaging plane dimensions.
Innovation Solution
A compact imaging lens system design comprising eight lenses, each with specific refractive powers and surface configurations, adhering to conditional expressions that optimize space utilization and resolution, including lenses with convex and concave surfaces, and materials with high light transmittance and workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor size and imaging plane size are increased to achieve high resolution, then the resolution is improved, but the overall size of the camera module and imaging lens system increases
Solution Approach 1:
The imaging lens system is divided into multiple lens groups (first through eighth lenses) with different refractive powers and surface configurations. This segmentation allows each lens to contribute differently to the overall optical performance, enabling high resolution while maintaining a compact form factor through optimized light path management.
Solution Approach 2:
Different lenses within the system have different surface configurations (convex or concave object-side and image-side surfaces) and refractive powers specifically tailored to their positions. This local optimization of optical properties allows the system to achieve high resolution imaging while controlling the overall size through precise local control of light refraction at each lens interface.
2Measurement precision
If the sensor size and imaging plane size are increased to achieve high resolution, then the resolution is improved, but the thickness of the electronic device increases
Solution Approach 1:
The lens surfaces are designed with dynamic curvature variations (convex and concave configurations) that optimize light path folding and refraction. This dynamic surface design enables the system to achieve high resolution imaging within a reduced thickness by controlling the angular deviation and convergence of light rays through each lens interface.
Solution Approach 2:
The optical system utilizes multi-dimensional light path control through the sequential arrangement of eight lenses with varying refractive powers. By managing light propagation in multiple spatial dimensions through the lens array, the system achieves high resolution while compressing the optical path length in the thickness direction, enabling thin device integration.
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
Enables high-resolution imaging in a compact form factor suitable for thin electronic devices by optimizing lens arrangements and materials, allowing for efficient integration and performance.
Implementation Method 1
a first lens having a refractive power; a second lens having positive refractive power, and having a concave image-side surface; a third lens having a refractive power; a fourth lens having positive refractive power, and having a concave image-side surface
Data Source
AI summary
An imaging lens system is provided. The imaging lens system includes a first lens having refractive power; a second lens having positive refractive power and having a concave image-side surface; a third lens having refractive power; a fourth lens having positive refractive power and having a concave image-side surface; a fifth lens having a concave object-side surface; a sixth lens having a concave image-side surface; a seventh lens having a convex object-side surface; and an eighth lens having refractive power, wherein the first to eighth lenses are sequentially arranged from an object-side to an imaging side, and the imaging lens system satisfies the following conditional expression: 0.15<BFL/TTL, where BFL is a distance from an image-side surface of the eighth lens to an imaging plane, and TTL is a distance from an object-side surface of the first lens to the imaging plane.