Six-Element Optical Imaging Lens Design for Compact Systems
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Solution Overview
Problem
The challenge lies in designing an optical imaging lens that balances miniaturization with good imaging quality and an enhanced field of view, while also considering manufacturing constraints such as production yield and material properties.
Innovation Solution
The optical imaging lens is composed of six specific lens elements with carefully designed surface shapes and refracting powers, arranged along an optical axis, satisfying specific conditions regarding Abbe numbers, thicknesses, and air gaps to achieve optimal imaging quality and reduced length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lens size is reduced to meet compact product demands, then the lens length decreases, but the imaging quality deteriorates
Solution Approach 1:
The optical lens is divided into six separate lens elements with different refracting powers and surface shapes, arranged in sequence from object side to image side. This segmentation allows each element to contribute specifically to correcting aberrations and maintaining imaging quality while keeping the overall lens length compact through optimized individual element dimensions and air gaps.
Solution Approach 2:
Different regions of the lens elements have different surface shapes (convex or concave) and refracting powers tailored to specific functional requirements. For example, the second lens element has a convex periphery region on its object-side surface, while the fourth and sixth lens elements have concave optical axis regions on their image-side surfaces. This local differentiation enables precise control of light paths to maintain imaging quality in a compact form.
2Length of moving object
If the lens size is reduced to meet compact product demands, then the lens length decreases, but the field of view narrows
Solution Approach 1:
The lens design incorporates variable surface curvatures and refracting powers across different lens elements to dynamically adjust light path control. The combination of negative and positive refracting powers, along with convex and concave surface regions, enables the compact lens to achieve a wide field of view by optimally directing light rays from various angles to the image sensor.
Solution Approach 2:
The patent utilizes the spatial arrangement and surface curvature variations in multiple dimensions (convex/concave regions, different radii of curvature) to expand the field of view beyond what a simple reduction in lens length would permit. The six-element configuration with specific surface shapes creates dimensional complexity that enables wide-angle imaging in a compact form factor.
3Length of moving object
If the lens elements are reduced in number or size for miniaturization, then the lens length decreases, but chromatic aberration increases
Solution Approach 1:
The optical lens uses six different lens elements made from materials with different Abbe numbers (V1, V2, V3, V4, V5, V6) to form a composite optical system. This composite structure enables chromatic aberration correction through the combined dispersive properties of different materials, allowing the compact lens to maintain low chromatic aberration despite its reduced size.
Solution Approach 2:
The patent employs parameter optimization including specific Abbe number combinations (V2+V3≥100.000), thickness ratios ((T1+G12+T5+G56)/(T2+G23)≤3.400), and surface curvature variations to control chromatic aberration. These parameter changes across the six lens elements enable the compact design to achieve excellent chromatic aberration correction.
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 improves imaging quality, reduces lens length, and broadens the field of view while maintaining low chromatic aberration and distortion, thus addressing the limitations of existing designs.
Implementation Method 1
Each of the first through the sixth lens elements 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 including 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 arranged in sequence from an object side to an image side along an optical axis is provided. Each lens element includes an object-side surface and an image-side surface. The first lens element has negative refracting power. The second lens element has negative refracting power, and a periphery region of the object-side surface of the second lens element is convex. An optical axis region of the image-side surface of the fourth lens element is concave. An optical axis region of the image-side surface of the sixth lens element is concave. A periphery region of the image-side surface of the sixth lens element is convex.