Five-Lens Optical Imaging Layout for Low-Light Vehicle Vision
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Solution Overview
Problem
Existing optical imaging systems for vehicles face challenges in clearly photographing objects in low illumination environments, particularly at night, due to their small size and the need to capture images in both visible and near-infrared ray regions.
Innovation Solution
An optical imaging system comprising five lenses with specific refractive powers and surface curvatures, including a stop between certain lenses, optimized to achieve high resolution and miniaturization, allowing clear photography in visible and near-infrared regions with a low F-number, suitable for use in vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical imaging system is made small for vehicle mounting, then the device size is reduced, but the ability to clearly photograph objects in low illumination conditions deteriorates
Solution Approach 1:
The optical imaging system is divided into five separate lens elements (first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5) with different refractive powers and surface curvatures. This segmentation allows each lens to be optimized for specific optical functions while maintaining a compact overall system size suitable for vehicle mounting.
Solution Approach 2:
Different lens elements are assigned specific local optical properties: the first lens has a convex image-side surface, the second lens has a concave image-side surface, the third lens has negative refractive power, and so on. This local differentiation of optical qualities enables the compact system to achieve high image quality in both visible and near-infrared regions despite the small overall size.
2Manufacturing precision
If the optical imaging system is designed for high resolution in visible and near-infrared regions, then the image quality is improved, but the device complexity increases
Solution Approach 1:
The optical imaging system is designed with five lens elements that collectively serve multiple functions: they provide high-resolution imaging in both visible and near-infrared regions, maintain a compact form factor for vehicle mounting, and achieve low F-number for low-light performance. This multi-functionality is achieved through the specific arrangement of lenses with different refractive powers and surface curvatures, eliminating the need for separate optical systems for different functions.
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 effectively captures high-resolution images in both visible and near-infrared regions, even in low illumination conditions, while being compact and cost-effective, maintaining performance across varying temperatures.
Implementation Method 1
a first lens L1 including a positive refractive power and a convex image-side surface; a second lens L2 including a positive refractive power; a third lens L3 including a negative refractive power; a fourth lens L4 including a positive refractive power; and a fifth lens L5 including a positive refractive power
Data Source
AI summary
An optical imaging system includes a first lens, as second lens, a third lens, a fourth lens, and a fifth lens. The first lens includes a positive refractive power and a convex image-side surface. The second lens includes a positive refractive power, and the third lens includes a negative refractive power. The fourth lens includes a positive refractive power, and the fifth lens includes a positive refractive power. The first to fifth lenses are sequentially disposed from an object side toward an imaging plane.