Optical Imaging Lens Compact Design Aberration Correction
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Solution Overview
Problem
The challenge is to design an optical imaging lens that maintains good optical performance while being compact, as traditional lens designs struggle to achieve both high imaging quality and small size, especially in mobile devices where space is limited and lighting conditions can be insufficient.
Innovation Solution
The optical imaging lens is designed with a three-element structure, including an aperture stop, a first lens element with positive refracting power, a second lens element with negative refracting power, and a third lens element, where the image-side surface of the first lens element has a convex portion near the periphery, and the image-side surface of the second lens element has a convex portion near the optical axis, satisfying the condition 2×ν1≦ν2+ν3, where ν1, ν2, and ν3 are the dispersion coefficients of the respective lens elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the length of the optical imaging lens is reduced to achieve compactness, then the size of the lens system is reduced, but the imaging quality deteriorates
Solution Approach 1:
The optical imaging lens is divided into three separate lens elements (first, second, and third lens elements), each with specific refracting power and dispersion characteristics. This segmentation allows each element to contribute differently to the overall optical performance, enabling compact design while maintaining imaging quality through coordinated aberration correction across multiple elements.
Solution Approach 2:
Each lens element is designed with specific local characteristics: the first lens element has positive refracting power with specific dispersion, the second has negative refracting power, and the third has positive refracting power. The dispersion relationship 2×ν1≦ν2+ν3 creates localized optical properties that collectively correct aberrations in the compact system.
2Reliability
If the field of view and aperture size are increased to improve imaging quality in insufficient lighting, then the lens space increases, but the device size increases
Solution Approach 1:
The patent optimizes specific parameters including the dispersion relationship (2×ν1≦ν2+ν3), refracting powers of individual elements, and surface curvatures to achieve a compact configuration that provides sufficient field of view and aperture for low-light imaging without increasing overall lens space.
3Area of stationary object
If the ratio of lens elements with good imaging quality is reduced to decrease lens space, then the device becomes more compact, but the manufacturing complexity increases
Solution Approach 1:
The patent uses three lens elements with specific local optical properties (refracting power and dispersion characteristics) that are optimized for manufacturing. The dispersion relationship 2×ν1≦ν2+ν3 creates a balanced design where each element can be manufactured with standard tolerances while achieving the desired compact form factor and imaging quality.
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 effectively reduces the lens system length while maintaining good imaging quality, overcoming aberrations and providing a larger field of view, making it suitable for thin, lightweight mobile devices with improved manufacturing yield.
Implementation Method 1
a first lens element (3), a second lens element (4), and a third lens element (5) from an object side to an image side in order along an optical axis (I), and the first lens element (3) has positive refracting power
Implementation Method 2
the second lens element (4) has negative refracting power
Implementation Method 3
the third lens element (5) has positive refracting power
Implementation Method 4
The image-side surface of the first lens element has a convex portion in a vicinity of a periphery of the first lens element
Implementation Method 5
the image-side surface of the second lens element has a convex portion in a vicinity of the optical axis
Implementation Method 6
the second lens element (4) has negative refracting power
Data Source
AI summary
An optical imaging lens includes an aperture stop and first, second, and third lens elements from an object side to an image side in order along an optical axis. Each of the lens elements has an object-side surface and an image-side surface. The image-side surface of the first lens element has a convex portion in a vicinity of a periphery. The second lens element has negative refracting power, and the image-side surface of the second lens element has a convex portion in a vicinity of the optical axis. The optical imaging lens satisfies: 2×ν1≦ν2+ν3, wherein ν1, ν2, and ν3 are respectively the coefficients of dispersion of the first, second, and third lens elements. A mobile device is also provided.