Seven-Element Imaging Lens for 190° Wide-Field Vehicle Cameras
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Solution Overview
Problem
Existing imaging lens systems for vehicles face challenges in achieving both high resolution and a wide field of view due to structural limitations, making it difficult to increase lens size for improved performance.
Innovation Solution
An imaging lens system comprising seven lenses with specific refractive powers and surface configurations, including concave and convex surfaces, arranged to provide a field of view of 190 degrees or more and an f-number of 1.9 or less, while minimizing lens size changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the diameter of front lens and other lenses is increased to implement a vehicle camera with a low f number, then the f number is reduced and light gathering ability is improved, but the lens size increases which conflicts with structural and design limitations of vehicle components
Solution Approach 1:
The patent applies parameter changes by carefully controlling the focal lengths, curvature radii, and thicknesses of seven lens elements to achieve an f number of 1.9 or less while maintaining a compact overall lens diameter that fits within vehicle component structural limitations
Solution Approach 2:
The patent divides the imaging lens system into seven separate lens elements with specific refractive powers and surface configurations, allowing each element to contribute to the overall optical performance and enabling the system to achieve low f number without requiring a single large lens element
2Measurement precision
If the lens size is increased to achieve high resolution and wide field of view, then imaging performance is improved, but it becomes difficult to mount the camera due to structural limitations of vehicle components
Solution Approach 1:
The patent achieves high-resolution imaging with a wide field of view of 190 degrees or more by optimizing optical parameters including focal lengths, curvature radii, and spacing between lens elements, all while maintaining a compact form factor that facilitates mounting on vehicle components
Solution Approach 2:
The patent achieves a wide field of view of 190 degrees or more through sophisticated lens design that effectively expands the angular coverage without proportionally increasing the physical lens diameter, allowing high-resolution wide-angle imaging within constrained mounting spaces
3Adaptability or versatility
If the field of view is increased to 190 degrees or more, then wide-angle coverage is achieved, but the complexity of lens design and manufacturing increases
Solution Approach 1:
The patent divides the wide-field imaging task across seven lens elements with alternating convex and concave surfaces, where each element contributes to the overall 190-degree field of view while maintaining manageable individual element complexities that can be manufactured with standard precision
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 system achieves high-resolution imaging with a wide field of view without significantly increasing lens size, suitable for vehicle cameras and surveillance systems.
Implementation Method 1
a first lens having refractive power, a second lens having a concave object-side surface, a third lens having refractive power, a fourth lens having a concave object-side surface, a fifth lens having refractive power, a sixth lens having a concave object-side surface, and a seventh lens having refractive power
Data Source
AI summary
An imaging lens system includes a first lens having refractive power; a second lens having a concave object-side surface; a third lens having refractive power; a fourth lens having a concave object-side surface; a fifth lens having refractive power; a sixth lens having a concave object-side surface; and a seventh lens having refractive power, wherein the first to the seventh lenses are disposed in sequential order from an object side, and wherein a field of view is 190 degrees or more.