Eight-Lens Optical Imaging Assembly for Compact High-Quality Photography
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Solution Overview
Problem
The challenge lies in designing an optical imaging lens assembly for portable electronic products that balances miniaturization with high imaging quality, while meeting stringent length requirements and accommodating the miniaturization of image sensors like CCD and CMOS, which demands improved refractive power distribution and surface shapes across lenses.
Innovation Solution
The optical imaging lens assembly comprises eight lenses with specific refractive powers and surface shapes, including positive and negative refractive powers, convex and concave surfaces, and carefully controlled focal lengths and spacings, optimizing the refractive power distribution and surface shapes to achieve miniaturization, large aperture, and high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the total length of imaging lens assembly is reduced to meet miniaturization requirements, then the lens assembly can be applied to portable electronic products, but the design freedom is reduced and design difficulty increases
Solution Approach 1:
The imaging lens assembly is divided into eight individual lenses with specific refractive power assignments (positive, negative, and mixed). Each lens has controlled curvature radii and thickness parameters, allowing the system to achieve compact overall length while distributing optical functions across multiple elements to maintain design flexibility and correct aberrations.
2Volume of moving object
If the size of image sensors (CCD or CMOS) is reduced, then portable electronic products can be miniaturized, but higher requirements are placed on the imaging lens assembly to maintain imaging quality
Solution Approach 1:
Each lens in the eight-lens assembly has specifically optimized local properties including refractive power (positive or negative), curvature radii (R1-R10), and center thickness (CT1-CT8). The fourth lens features convex object-side and image-side surfaces, the fifth lens has a concave image-side surface, and spacing parameters (T12, T23, T34, T45, T56, T67, T78) are precisely controlled to maintain high imaging quality despite miniaturization.
3Length of moving object
If lenses with specific refractive powers and surface shapes are used to achieve miniaturization and large aperture, then compact design is achieved, but aberration correction becomes more challenging
Solution Approach 1:
The patent combines multiple lenses with alternating positive and negative refractive powers into a unified eight-element assembly. This merging of diverse optical elements with different surface configurations (convex, concave, aspheric) enables simultaneous achievement of compact length, large aperture (f/EPD ≤ 2.0), and effective correction of low-order aberrations through the collective optical power distribution.
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
This configuration effectively compensates for low-order aberrations, reduces tolerance sensitivity, and enhances imaging quality, particularly in dark environments and wide fields of view, while ensuring the lens assembly is compact and suitable for production.
Implementation Method 1
The first lens has a positive refractive power
Implementation Method 2
the second lens has a negative refractive power
Implementation Method 3
the eighth lens has a negative refractive power
Data Source
AI summary
The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has a positive refractive power; the second lens has a negative refractive power; the third lens has a positive or negative refractive power; the fourth lens has a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a convex surface; the fifth lens has a positive or negative refractive power, and an image-side surface thereof is a concave surface; the sixth lens has a positive or negative refractive power; the seventh lens has a positive refractive power; and the eighth lens has a negative refractive power.