Eight-Lens Imaging Assembly for Wide-Angle Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance among high image quality, low sensitivity, proper aperture size, miniaturization, and a desirable field of view due to the rapid advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
An optical imaging lens assembly with eight lens elements, each with specific refractive powers and surface shapes, including aspheric surfaces and inflection points, is designed to optimize these parameters, with conditions such as central thickness ratios, focal length relationships, and Abbe number distributions to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality, then image quality is improved, but device complexity and size increase
Solution Approach 1:
The patent applies parameter changes by specifying precise refractive power relationships (f1/f7 ratio), thickness ratios (CT1+CT2+CT3+CT4)/(CT7+CT8), and curvature radius relationships (R1/R16) to optimize the optical performance of the eight-lens assembly, achieving high image quality through controlled parameter variations rather than simply adding more elements
Solution Approach 2:
The patent utilizes aspheric surfaces with inflection points on specific lens elements (first, seventh, and eighth lens elements) to correct optical aberrations and improve image quality, replacing simple spherical surfaces with complex curved geometries that provide better optical control
2Volume of moving object
If the lens assembly is miniaturized to reduce device size, then device size is reduced, but image quality and field of view deteriorate
Solution Approach 1:
The patent achieves miniaturization while maintaining image quality by controlling the total track length TL relative to focal length f (TL/f ratio) and by optimizing the distribution of lens thicknesses and air gaps according to specific ratio relationships, allowing compact design without sacrificing optical performance
Solution Approach 2:
The patent divides the optical system into eight distinct lens elements with alternating positive and negative refractive powers, creating a segmented structure that enables better control of light paths and aberrations within a compact form factor
3Use of energy by moving object
If the aperture size is increased to improve light gathering, then light gathering capability is improved, but sensitivity control and aberration correction become more difficult
Solution Approach 1:
The patent employs a composite lens design combining materials with different refractive indices and Abbe numbers across the eight lens elements, allowing simultaneous optimization of light gathering (through appropriate aperture selection) and aberration correction (through chromatic and spherical aberration compensation using material diversity)
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 design achieves a wide field of view, reduces size, corrects aberrations, and balances sensitivity and aperture, resulting in improved image quality and flexibility for various applications.
Implementation Method 1
The first lens element has negative refractive power in a paraxial region thereof... The seventh lens element has negative refractive power in a paraxial region thereof
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An optical imaging lens assembly includes eight lens elements (E1-E8) which are, in order from an object side to an image side: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6), a seventh lens element (E7) and an eighth lens element (E8). The first lens element with negative refractive power (E1) has an object-side surface being concave in a paraxial region thereof and having at least one inflection point. The second lens element (E2) has an object-side surface being convex in a paraxial region thereof. The seventh lens element (E7) has negative refractive power. The eighth lens element (E8) has an image-side surface being concave in a paraxial region thereof and having at least one inflection point. At least one lens surface of at least one of the second to seventh lens elements (E2-E7) is aspheric.