Six-Element Camera Lens Assembly for Aberration Control
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Solution Overview
Problem
Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to the rapid advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
A photography optical lens assembly comprising six lens elements with specific refractive power configurations and surface shapes, including convex and concave surfaces with critical points, and an air gap between adjacent elements, optimized by conditions on Abbe numbers, thickness ratios, and curvature radii to correct aberrations and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel size is scaled down to improve image quality, then image quality improves, but optical system complexity increases
Solution Approach 1:
The optical system is divided into six separate lens elements with different refractive powers and surface shapes. Each lens element is optimized for specific aberration correction, allowing the system to achieve high image quality with scaled-down pixels while managing complexity through modular design
Solution Approach 2:
Different regions of the lens assembly have different optical properties. The first lens element has positive refractive power with specific surface curvatures, while subsequent elements have varying refractive powers and surface shapes tailored to correct specific aberrations at different positions in the optical path
2Volume of moving object
If aperture size is reduced for miniaturization, then device size decreases, but image quality deteriorates
Solution Approach 1:
The system changes optical parameters including refractive indices, surface curvatures, and lens spacing to achieve high image quality with a compact aperture. The specific curvature radii and thickness ratios are optimized to maintain performance while reducing overall device volume
Solution Approach 2:
Multiple lens elements feature spherical or aspherical surfaces with specific curvature radii. The concave and convex surfaces with optimized curvature values enable effective light control and aberration correction within a compact aperture size
3Adaptability or versatility
If field of view is increased for versatility, then adaptability improves, but optical aberrations increase
Solution Approach 1:
The wide field of view is achieved by segmenting the optical path into six lens elements, each responsible for correcting specific aberrations introduced by the wide angle. This modular approach allows the system to maintain manufacturing precision across extended field of view
Solution Approach 2:
Intermediate lens elements with specific refractive powers and surface shapes act as mediators between the wide-angle front elements and the image sensor. These intermediate elements correct aberrations and transmit optical information faithfully across the extended 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 achieves a balanced performance in image quality, field of view, and compact size while reducing manufacturing complexity and environmental sensitivity, enhancing image clarity and manufacturability.
Implementation Method 1
Each of the six lens elements has a refractive power configured to correct for optical aberrations
Data Source
AI summary
A photography optical lens assembly includes six 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, a fourth lens element, a fifth lens element and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The image-side surface of the fifth lens element is concave in a paraxial region thereof and has at least one critical point in an off-axis region thereof. The object-side surface of the sixth lens element is convex in a paraxial region thereof and has at least one critical point in an off-axis region thereof.