Eight-Lens Imaging Optics for Thin High-Resolution Modules
Find Innovative SolutionsGenerate Solutions
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
An imaging lens system comprising a specific arrangement of lenses with defined refractive powers and surface configurations, including a first lens with a convex object-side surface, a second lens with positive refractive power and concave image-side surface, and an eighth lens with a convex object-side surface, satisfying conditional expressions like BFL/TTL > 0.15 and TTL/f < 1.5, which allows for compact design without compromising resolution.
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 is improved, but the overall size of the camera module and imaging lens system increases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the refractive powers, curvatures, and spacing of each lens element. The conditional expressions (e.g., 0.15 < BFL/TTL < 0.35, 0.3 < f1/f2 < 1.5) define optimized parameter ranges that enable high resolution with reduced overall size. This involves changing optical parameters like focal lengths and surface curvatures to achieve compact design.
Solution Approach 2:
The imaging lens system is segmented into eight distinct lens elements, each with specific refractive powers and surface configurations. This segmentation allows independent optimization of each element's function, enabling the system to achieve high resolution while maintaining a compact form factor through distributed optical functionality.
2Measurement precision
If the sensor and imaging plane size are increased to achieve high resolution, then the resolution is improved, but the thickness of the device increases
Solution Approach 1:
The patent optimizes the thickness parameter by controlling the axial distances between lens elements and the imaging plane. The conditional expression 0.15 < BFL/TTL < 0.35 directly addresses thickness optimization, where BFL (back focal length) and TTL (total track length) are adjusted to achieve thin design while maintaining high resolution through proper parameter selection.
Solution Approach 2:
The patent employs complex surface geometries including aspherical surfaces and specific curvature configurations to achieve high resolution in a compact axial dimension. By utilizing advanced surface forms rather than simple spherical lenses, the system achieves superior optical performance without increasing thickness.
3Volume of moving object
If the lens arrangement is optimized for compact design, then the device size is reduced, but the resolution may be compromised
Solution Approach 1:
The system divides the optical function across eight lens elements with specific refractive power distributions. This segmentation allows each element to contribute to both compactness and resolution, with positive and negative power elements working together to correct aberrations while maintaining a short overall length.
Solution Approach 2:
The patent establishes specific parameter ranges for lens spacing, focal lengths, and surface curvatures that simultaneously achieve compact size and high resolution. The conditional expressions define the optimal parameter space where both small form factor and high imaging quality are achieved together.
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 portable devices by optimizing lens arrangement and spacing, facilitating integration into devices with limited space.
Implementation Method 1
a first lens having a refractive power; a second lens having positive refractive power; a third lens having a refractive power; a fourth lens having positive refractive power; a fifth lens; a sixth lens having a refractive power; a seventh lens having positive refractive power; and an eighth lens having a refractive power
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.