Eight-Lens Optical Imaging System for Compact High-Quality Photography
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Solution Overview
Problem
There is a need for an optical imaging lens that balances miniaturization and high imaging quality for portable electronic devices, which existing lenses fail to achieve effectively.
Innovation Solution
The optical imaging lens is designed with a specific configuration of eight lenses, including lenses with positive and negative focal powers, optimized focal lengths, and curvature radii, along with aspherical surfaces, to improve imaging quality while being miniaturized and lighter. This configuration includes a diaphragm and filter for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased to improve imaging quality, then imaging quality is improved, but device complexity and size increase
Solution Approach 1:
The optical imaging lens divides the optical system into eight distinct lens elements (first lens to eighth lens), each with specific focal powers and surface configurations. This segmentation allows complex imaging functions to be distributed across multiple specialized components, achieving high imaging quality while maintaining manageable system complexity through modular design
Solution Approach 2:
Each lens element is designed with specific local characteristics: the first lens has positive focal power with convex-concave surfaces, the second lens has negative focal power with convex-concave surfaces, and subsequent lenses have varying focal powers and surface configurations. This local quality differentiation optimizes the imaging performance of each component for its specific function within the overall system
2Volume of moving object
If the lens size is reduced for miniaturization, then device size is reduced, but imaging quality deteriorates
Solution Approach 1:
The lens system employs aspherical surfaces on multiple lens elements, including the first lens with object side convex surface and image side concave surface, the second lens with object side convex surface and image side concave surface, and other lenses with varying surface curvatures. These curved and aspherical surfaces enable compact lens design while maintaining high imaging quality by effectively controlling light paths and reducing aberrations within a small form factor
Solution Approach 2:
The patent specifies precise parameter ranges for the optical system: total effective focal length f satisfies 3.0mm<f<5.0mm, curvature radii R1 through R16 have specific ranges, spacing distances T12 through T78 are optimized, and the ratio f/R13>2.5. These parameter optimizations enable miniaturization while preserving imaging quality through mathematical optimization of the optical system
3Illumination intensity
If the aperture is increased to improve light gathering ability, then light gathering ability is improved, but lens size and complexity increase
Solution Approach 1:
The patent optimizes the aperture in a multi-dimensional parameter space, specifying that the aperture diameter satisfies 1.5mm<aperture diameter<2.5mm while coordinating it with focal length f (3.0mm<f<5.0mm) and curvature radii R1-R16. This multi-dimensional optimization allows achieving high light gathering ability (f/EPD<2.5) without proportionally increasing lens size, as the aperture is balanced with other optical parameters
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 imaging quality with a large aperture, high pixel count, and a wide field of view, suitable for both long-range and short-range views, while maintaining a compact and lightweight design.
Implementation Method 1
an optical imaging lens sequentially includes from an object side to an image side along an optical axis: a first lens having a positive focal power; a second lens having a negative focal power
Data Source
AI summary
The disclosure discloses an optical imaging lens, wherein the optical imaging lens sequentially from an object side to an image side along an optical axis includes, a first lens having a focal power; a second lens having a focal power, with an object side surface being a convex surface, and an image side surface being a concave surface; a third lens having a focal power; a fourth lens having a focal power; a fifth lens having a focal power, with an object side surface being a concave surface; a sixth lens having a focal power; a seventh lens having a positive focal power; and an eighth lens having a negative focal power; wherein, a total effective focal length f of the optical imaging lens and a combined focal length f34 of the third lens and the fourth lens satisfy: 0<f/f34≤0.6.