Wide-Angle Imaging Lens Miniaturization via Segmented Asymmetric Design
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Solution Overview
Problem
Conventional wide-angle imaging lenses face challenges in miniaturization and maintaining high imaging quality while preserving a wide-angle feature, as smaller pixel sizes require smaller image lenses, which often compromise imaging quality and field angle.
Innovation Solution
A wide-angle imaging lens design comprising specific lens elements with defined focal powers and surface shapes, including a first concave object side surface, a second concave image side surface, a third positive focal power with a convex image side surface, a fourth negative focal power with a meniscus object side surface, and a fifth lens with positive focal power and inflection points, meeting specific formulas to ensure miniaturization and wide-angle capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the image lens is made smaller to adapt to smaller pixel sizes, then the imaging lens size is reduced, but the imaging quality deteriorates
Solution Approach 1:
The imaging lens is divided into five separate lens elements (first lens E1, second lens E2, third lens E3, fourth lens E4, and fifth lens E5), each with specific focal powers and surface shapes. This segmentation allows each element to contribute differently to the overall optical performance, enabling high imaging quality in a compact form factor by distributing the optical functions across multiple smaller components rather than requiring a single large lens.
2Volume of moving object
If the image lens is made smaller to adapt to smaller pixel sizes, then the image lens size is reduced, but the field angle is narrowed
Solution Approach 1:
The lens elements employ asymmetric surface designs including concave object side surfaces, convex image side surfaces, and meniscus shapes with inflection points. These asymmetric configurations optimize light ray paths across wide angles while maintaining compact dimensions, allowing the lens to achieve both a wide field angle (50 degrees or more) and small size by non-uniformly distributing optical power across the aperture and field.
3Reliability
If additional lenses are added to improve imaging quality, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
Each lens element is designed with specific local optical properties: the first lens has a concave object side surface, the second lens has a concave image side surface, the third lens has a convex image side surface, the fourth lens has a meniscus shape with inflection points, and the fifth lens has a convex object side surface. These localized quality variations in each element's surface shape and focal power allow the system to achieve high imaging quality through coordinated local optimizations rather than requiring a complex overall structure.
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 miniaturization, maintains high imaging quality, and enlarges the field angle, ensuring both compact size and wide-angle features through optimized lens configurations and surface shapes.
Implementation Method 1
a first lens E1, a second lens E2, a third lens E3, a fourth lens E4 and a fifth lens E5 from an object side of the wide-angle imaging lens to an image side of the wide-angle imaging lens in turn
Data Source
AI summary
Provided is a wide-angle imaging lens, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side of the wide-angle imaging lens to an image side of the wide-angle imaging lens in turn. The first lens is of a focal power, an object side surface of the first lens close to an axis is concave; the second lens is of a focal power, an image side surface of the second lens is concave; the third lens is of a positive focal power, an image side surface of the third lens is convex; the fourth lens is of a negative focal power, an object side surface of the fourth lens is concave and in a meniscus shape; the fifth lens is of a focal power, an object side surface of the fifth lens close to the axis is convex.