Seven-Lens Imaging System for Wide-Angle On-Board Detection
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Solution Overview
Problem
Conventional imaging lenses struggle to detect far objects at high resolution with a wide angle of view while maintaining a compact size, particularly for on-board imaging devices used in automotive applications.
Innovation Solution
The imaging lens configuration includes a first negative lens, a meniscus-shaped second negative lens, a third positive lens, a fourth positive lens, a cemented fifth and sixth lens with negative and positive refractive powers, and a seventh positive lens, arranged to achieve strong negative refractive power and wide angle of view while minimizing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide angle of view is achieved using conventional imaging lens configurations, then the angle of view increases, but the outer diameter of the lens and the device size increase
Solution Approach 1:
The imaging lens is divided into seven distinct lens elements with specific refractive powers arranged in a predetermined sequence. This segmentation allows each lens to contribute differently to the overall optical performance, enabling a wide angle of view while maintaining a compact form factor through optimized individual lens functions.
Solution Approach 2:
The patent applies specific conditional expressions that define parameter relationships between lens elements, such as the ratio of focal lengths and refractive powers. By controlling these parameters within specific ranges, the lens achieves a wide angle of view while keeping the outer diameter and overall device size reduced.
2Adaptability or versatility
If the lens configuration is optimized for wide angle of view, then the angle of view increases, but the imaging resolution of far objects deteriorates
Solution Approach 1:
The seven-lens configuration with specific positive and negative refractive powers is segmented to handle different spatial frequencies and focal distances. This allows the lens to maintain high resolution for far objects while simultaneously achieving a wide angle of view, as each lens element contributes to different aspects of the optical performance.
Solution Approach 2:
The patent defines specific parameter ranges and conditional expressions that control the relationship between focal lengths, refractive powers, and lens positions. These parameter optimizations ensure that the lens maintains high imaging resolution for far objects even when configured for a wide angle of view.
3Volume of moving object
If the lens outer diameter is reduced for compact size, then the device size decreases, but the ability to detect far objects at high resolution deteriorates
Solution Approach 1:
The patent applies specific conditional expressions that define the relationship between lens parameters and detection performance. By optimizing these parameters within defined ranges, the lens achieves compact dimensions while maintaining the ability to detect far objects at high resolution, resolving the contradiction between size and detection capability.
4Device complexity
If a simpler lens configuration is used, then the device complexity decreases, but the ability to achieve wide angle of view with high resolution deteriorates
Solution Approach 1:
The lens is segmented into seven elements with specific refractive powers arranged in a predetermined sequence. This segmentation provides a balanced complexity that achieves both wide angle of view and high resolution performance, avoiding both oversimplification and excessive complexity.
Solution Approach 2:
The patent defines specific parameter ranges and conditional expressions that control the lens configuration. These parameter optimizations enable the lens to achieve wide angle of view with high resolution while maintaining a manageable level of complexity through systematic design constraints.
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 enables high-resolution imaging of far objects with a wide angle of view, suitable for on-board imaging devices, allowing for accurate detection of obstacles and traffic signs, and is compact enough for inconspicuous integration in vehicles.
Implementation Method 1
an imaging lens includes a first lens G1 having negative refractive power, a meniscus-shaped second lens G2 having a concave surface facing to an object side and having negative refractive power, a third lens G3 having positive refractive power, a fourth lens G4 having a convex surface on the object side and having positive refractive power, a fifth lens G5 having positive refractive power, a sixth lens G6 having negative refractive power, and seventh lens G7 having positive refractive power arranged in above order from the object side
Data Source
AI summary
An imaging lens according to the present invention includes a negative first lens, a meniscus-shaped negative second lens having a concave surface facing to an object side, a positive third lens, a positive fourth lens having a convex surface on the object side, a positive fifth lens, a negative sixth lens, and a positive seventh lens arranged in order from the object side. Furthermore, an imaging device according to the present invention includes the imaging lens.