Six-Lens Imaging Optical Assembly for Miniaturization and Aberration Control
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, appropriate aperture size, miniaturization, and a desirable field of view, making it difficult to meet the increasing functionality requirements of electronic devices with advanced image sensors.
Innovation Solution
An imaging optical lens assembly comprising six lens elements with specific refractive power distributions, thickness ratios, and curvature radii, including aspheric surfaces and inflection points, is designed to optimize light convergence, correct aberrations, and miniaturize the system while maintaining image quality.
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 lens assembly is divided into six distinct lens elements with specific positive and negative refractive powers, where each element contributes to correcting specific types of aberrations. The segmentation allows complex optical functions to be distributed across multiple simpler components, achieving high image quality while maintaining manageable complexity through systematic design
Solution Approach 2:
Each lens element serves multiple functions: the first lens element with positive refractive power provides both light convergence and aberration correction, while subsequent elements with alternating positive and negative powers simultaneously control different types of optical distortions. This multi-functionality reduces the need for additional specialized components
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 six lens elements are arranged in a compact nested configuration along the optical axis with optimized axial distances between them. This nesting allows the lens assembly to achieve a short total track length while maintaining sufficient space within each element for proper optical function, effectively packing complex optical functionality into a miniaturized form factor
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements with specifically designed curvature radii and conic coefficients, along with optimized central thickness ratios and axial spacing parameters. These parameter changes enable compact element designs that maintain effective optical power and aberration correction capabilities despite reduced overall size
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 image quality balance become difficult
Solution Approach 1:
The lens elements feature non-uniform surface profiles with aspheric zones optimized for different regions: the paraxial regions are designed for on-axis light rays to achieve sharp focus and proper refractive power, while the marginal zones are shaped to control off-axis rays and reduce aberrations. This local quality variation allows the aperture to effectively gather light across the entire surface while maintaining balanced image quality throughout the field of view
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 solution effectively balances image quality, sensitivity, and size, enabling the optical lens assembly to be applicable in various electronic devices with improved performance and manufacturing feasibility.
Implementation Method 1
The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof
Data Source
AI summary
An imaging optical lens assembly includes six lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof.