Five-Element Optical Imaging Lens Compact Design
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Solution Overview
Problem
Optical imaging lenses face challenges in being light, thin, and small while maintaining a large field of view and desired imaging quality, particularly in mobile devices where the distance from the object-side surface to the image plane along the optical axis needs to be minimized to keep devices thin.
Innovation Solution
The design incorporates a specific arrangement of lens elements with concave and convex surface regions and refracting powers, satisfying conditional expressions such as (T2+T4)/(T1+G12)≥2.900 and V2+V3+V4+V5≤170.000, which allows for a larger field of view, reduced length, and smaller area occupation in photography apparatus while maintaining imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance from the object-side surface of the first lens element to the image plane along the optical axis is increased to maintain imaging quality, then the imaging quality is improved, but the mobile phones and digital cameras cannot stay thin
Solution Approach 1:
The optical imaging lens is divided into five lens elements with different refracting powers (first: negative, second: positive, third: negative, fourth: positive, fifth: negative), allowing each element to contribute differently to image quality while maintaining a compact overall structure. This segmentation enables high imaging quality with a reduced total track length
Solution Approach 2:
The third lens element features concave periphery regions on both its object-side and image-side surfaces, creating localized optical corrections at specific areas of the lens. This local quality modification helps control aberrations while maintaining a short overall lens length
2Area of stationary object
If the optical imaging lens is designed to occupy a smaller area when being arranged in a photographing apparatus, then the device compactness is improved, but the field of view may be reduced
Solution Approach 1:
The lens design uses multiple lens elements arranged along the optical axis (vertical dimension) rather than increasing the lateral dimensions. By stacking five lens elements with alternating refracting powers, the system achieves a wide field of view while maintaining a small footprint area, effectively trading vertical space for lateral compactness
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 configuration effectively expands the field of view, reduces the length, and ensures desired imaging quality while occupying a smaller area in photography devices, addressing the need for a compact and high-performance optical imaging lens.
Implementation Method 1
Each of the first lens element to the fifth lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through
Data Source
AI summary
An optical imaging lens is provided, sequentially including a first lens element, an aperture, a second lens element, a third lens element, a fourth lens element, and a fifth lens element from an object side to an image side along an optical axis. The optical imaging lens satisfies conditional expressions V2+V3+V4+V5≤170.000 and (T2+T4)/(T1+G12)≥2.900. Furthermore, other optical imaging lenses are also provided.