Four-Element Imaging Lens Layout for Compact Aberration Correction
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Solution Overview
Problem
Conventional optical lens assemblies struggle to balance image quality, sensitivity, aperture size, volume, and field of view, making it difficult to achieve compactness and high image quality in modern electronic devices.
Innovation Solution
An image capturing optical lens system with four lens elements, each with specific refractive powers and surface configurations, including convex and concave surfaces, is designed to optimize compactness, aberration correction, and chromatic aberration control, using materials like glass and plastic with additives for wavelength-specific light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical lens assemblies are used, then image quality can be maintained, but the device volume and aperture size cannot be optimized simultaneously
Solution Approach 1:
The optical lens assembly is divided into multiple lens elements (first lens element, second lens element, third lens element, fourth lens element) with specific refractive powers and surface configurations. Each lens element contributes to correcting different types of aberrations, allowing the system to maintain high image quality while reducing overall device volume through optimized optical path design.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive power, curvature radii (R1-R8), thickness (CT1-CT4), and axial distances (T12-T34). These parameter optimizations enable compact design while maintaining image quality through controlled aberration correction across the optical system.
2Use of energy by moving object
If aperture size is increased for better sensitivity, then light gathering capability improves, but device volume and manufacturing complexity increase
Solution Approach 1:
The patent optimizes the aperture diameter within specific ranges (0.30<f/0.56, 0.68<TL/f<1.30) to balance light gathering capability with compact size. The specific curvature radii and thickness parameters of each lens element are tuned to achieve good aberration correction and sensitivity without requiring large aperture dimensions that would increase manufacturing complexity.
Solution Approach 2:
Different lens elements use materials with different Abbe numbers (V1-V4) and refractive indices (N1-N4). This composite material approach allows the system to achieve good chromatic aberration correction and light gathering capability through material properties rather than relying solely on large aperture size, thereby reducing manufacturing complexity.
3Reliability
If more lens elements are added to improve image quality, then aberration correction improves, but manufacturing difficulty and device volume increase
Solution Approach 1:
The optical system uses four lens elements with specific configurations (convex/concave surfaces with defined curvature radii) to correct different types of aberrations. This segmented approach distributes the correction function across multiple elements rather than requiring a single complex element, improving manufacturability while maintaining aberration correction performance.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including curvature radii (R1-R8), thickness (CT1-CT4), and axial distances (T12-T34). These parameter optimizations enable effective aberration correction with a manageable number of lens elements, avoiding the need for excessive elements that would increase manufacturing difficulty.
4Adaptability or versatility
If field of view is expanded, then imaging coverage improves, but optical path length and device volume increase
Solution Approach 1:
The optical lens assembly is divided into multiple lens elements (first lens element, second lens element, third lens element, fourth lens element) with specific refractive powers and surface configurations. Each lens element contributes to correcting different types of aberrations, allowing the system to maintain high image quality while reducing overall device volume through optimized optical path design.
Solution Approach 2:
The patent employs a multi-element lens configuration that manipulates light paths through three-dimensional spatial arrangement. By optimizing the axial distances (T12-T34) and radial curvature radii (R1-R8) of each element, the system achieves wide field of view (0.25<tan(HFOV)<0.70) without proportionally increasing the overall optical path length, effectively utilizing dimensional optimization to decouple field of view from path length.
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 system achieves a compact design with improved image quality, reduced manufacturing difficulties, and enhanced aberration correction, suitable for electronic devices with flexible space arrangements and reduced manufacturing costs.
Implementation Method 1
an image capturing optical lens system includes four lens elements, the four lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element and a fourth lens element
Implementation Method 2
using materials like glass and plastic with additives for wavelength-specific light absorption
Data Source
AI summary
An image capturing optical lens system includes four lens elements, which are, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an object-side surface being convex in a paraxial region thereof. The third lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The fourth lens element has negative refractive power.