Wide-Field Imaging Lens System Balancing 190° FOV and Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing imaging lens systems for vehicles face challenges in achieving high resolution and a wide field of view due to structural limitations, making it difficult to mount lenses with the desired specifications on vehicular components.
Innovation Solution
An imaging lens system comprising multiple lenses with specific refractive powers and surface configurations, including concave and convex surfaces, is designed to provide a wide field of view while maintaining high resolution, adhering to certain conditional expressions for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the f number is reduced to achieve high resolution, then the lens diameters must be increased, but this conflicts with the structural limitations of vehicular components
Solution Approach 1:
The imaging lens system is divided into multiple lens elements (first lens to seventh lens) with different refractive powers and surface configurations. This segmentation allows the system to achieve high resolution with a lower f number without requiring excessively large individual lens diameters, as each element contributes differently to the overall optical performance.
Solution Approach 2:
Different lens elements are assigned specific local properties: the first lens has negative refractive power, the third and fourth lenses have concave object-side surfaces, and the sixth lens has a concave object-side surface. These localized quality variations enable optimized light control and resolution achievement within constrained diameter limits.
2Adaptability or versatility
If a wide field of view is achieved through lens configuration, then the field of view increases to 190 degrees or more, but this may compromise resolution performance
Solution Approach 1:
The patent specifies precise parameter ranges for the lens system, including conditional expressions for focal lengths (e.g., −3.6 < f5/f6, −2.0 < f6/f7), effective diameters (e.g., L1S1ED/TTL > 0.65), and curvature radii. These parameter optimizations enable the system to simultaneously achieve a wide field of view (190° or more) and maintain high resolution by carefully balancing optical parameters.
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 a field of view of 190 degrees or more with high resolution, addressing the structural limitations by optimizing lens configurations and materials to fit various vehicular applications.
Implementation Method 1
a first lens L1 having negative refractive power; a second lens L2 having negative refractive power; a third lens L3 having positive refractive power; a fourth lens L4 having positive refractive power; a fifth lens L5 having positive refractive power; a sixth lens L6 having negative refractive power; and a seventh lens L7 having positive refractive power
Data Source
AI summary
An imaging lens system is provided. The imaging lens system includes a first lens having refractive power, a second lens having refractive power, a third lens having a concave object-side surface, a fourth lens having refractive power, a fifth lens having refractive power, a sixth lens having a concave object-side surface, and a seventh lens having refractive power. The first to seventh lenses may be sequentially disposed from an object side to an imaging side. In the imaging lens system, 20<V1−V3 and 190°≤FOV, where V1 is an Abbe number of the first lens, V3 is an Abbe number of the third lens, and FOV is a field of view of the imaging lens system.