Multi-element Optical Imaging Lens Aberration Control
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Solution Overview
Problem
The challenge lies in designing miniaturized optical lenses with improved image quality and reduced size, as scaling down traditional lenses is not sufficient and faces higher manufacturing difficulties due to material and production-related issues.
Innovation Solution
The optical imaging lens is designed with a specific arrangement of lens elements, including a first lens element with positive refracting power, a second lens element with negative refracting power, and a third and fourth lens element with specific convex and concave surface shapes, optimizing the lens system length, half field of view, and distance parameters to achieve favorable optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional lenses are scaled down to reduce size, then the lens size is reduced, but the image quality deteriorates and manufacturing difficulty increases
Solution Approach 1:
The optical lens is divided into multiple lens elements (first lens element with positive refracting power, second lens element with negative refracting power, third lens element, and fourth lens element) arranged in sequence. Each lens element has specific surface shape characteristics (convex portions in vicinity of optical axis and periphery, concave portions in vicinity of periphery) that work together to correct aberrations while maintaining a compact overall size, thereby resolving the contradiction between miniaturization and image quality.
2Length of moving object
If the lens system is miniaturized to meet consumer electronics requirements, then the product thickness is reduced, but the optical performance and assembly yield deteriorate
Solution Approach 1:
The patent specifies precise parameter ranges to optimize optical performance while maintaining miniaturization: half field of view (HFOV) ≤ 25°, total track length (TTL) ≤ 7.2 mm, and the ratio (T1+T2+T3)/(G12+G23) ≤ 2.0. These parameter constraints ensure that the miniaturized lens system achieves favorable optical performance and assembly yield by carefully controlling the relationship between lens element thicknesses and air gaps.
3Manufacturing precision
If lens elements are designed with specific convex and concave surface shapes to suppress aberration, then the image quality is improved, but the manufacturing complexity increases
Solution Approach 1:
Each lens element is designed with specific local surface characteristics: the first lens element has convex portions in the vicinity of both the optical axis and periphery; the second lens element has a concave portion in the vicinity of the periphery; the third and fourth lens elements have corresponding convex and concave portions. These localized surface shape variations allow effective aberration suppression while maintaining reasonable manufacturing feasibility by concentrating complexity only where optically necessary.
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 design achieves suppressed aberration and improved image quality while reducing the system length, making it suitable for thinner products with increased viewing angles and improved manufacturing yield.
Implementation Method 1
Each of the first to the fourth lens elements has an object-side surface, which faces the object side and allows an imaging ray to pass through, and an image-side surface, which faces the image side and allows the imaging ray to pass through
Data Source
AI summary
An optical imaging lens includes first, second, third, and fourth lens elements arranged in order from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The first lens element has positive refracting power. The object-side surface of the first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery. The second lens element has negative refracting power. The object-side surface of the third lens element has a concave portion in a vicinity of a periphery. The image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery.