Eight-Lens Optical Imaging Assembly with Compact Spacing
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Solution Overview
Problem
The challenge in the field of optical imaging lens assemblies for portable electronic products is to enhance imaging capabilities and competitive advantages by optimizing the optical system design, particularly in terms of refractive power distribution, surface shapes, and spacings within the lens assembly.
Innovation Solution
The optical imaging lens assembly comprises a sequence of eight lenses with specific refractive powers and aspheric surfaces, where the center thickness and spaced intervals between lenses are carefully configured to achieve a small total length and improved image quality, with a relative F number of ≤1.7, ensuring a large image plane and ultra-thinness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens assembly uses a traditional optical system design, then the structure is simpler, but the imaging capability and competitive advantage are insufficient
Solution Approach 1:
The optical system is divided into eight separate lenses with different refractive powers arranged in sequence along the optical axis. Each lens is designed with specific parameters (curvature radii, thicknesses, spacings) to contribute to the overall imaging performance, allowing complex optical functions to be achieved through modular combination of simpler elements
Solution Approach 2:
Different regions of the lens assembly are optimized with specific local characteristics - the first lens has positive refractive power with specific curvature, the second lens has negative refractive power, and so on. Each lens position and parameter is locally optimized to correct specific aberrations and contribute to the overall imaging quality
2Length of moving object
If the lens assembly is made thinner, then the total length is reduced, but the imaging quality may deteriorate
Solution Approach 1:
The patent optimizes multiple parameters simultaneously including the curvature radii of lens surfaces, the thickness of each lens, the spacing between lenses, and the refractive indices of lens materials. By carefully adjusting these parameters, the system achieves a compact total length while maintaining high imaging quality through precise optical design
Solution Approach 2:
The patent addresses the thickness constraint by optimizing the optical path in three-dimensional space, arranging lenses at different positions and angles along the optical axis, and using aspheric surface geometries to achieve effective optical length reduction without sacrificing imaging performance
3Area of stationary object
If the lens assembly has a larger image plane, then the field of view is increased, but the total length increases
Solution Approach 1:
The optical system uses aspheric surfaces with specific conic coefficients to dynamically control light paths and optimize the relationship between focal length, image plane size, and overall length. The aspheric shapes allow the system to achieve larger effective image planes while maintaining compact dimensions through optimized light bending
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 results in a compact optical imaging lens assembly with enhanced image quality, reduced distortion, and improved manufacturability, suitable for portable electronic products.
Implementation Method 1
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 having 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 having refractive power. A center thickness CT6 of the sixth lens along the optical axis and a spaced interval T56 between the fifth lens and the sixth lens along the optical axis satisfy: 1.5<CT6/T56<2.6. A relative F number Fno of the optical imaging lens assembly satisfies: Fno≤1.7.