Five-Lens Optical Assembly for Vehicle Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle-mounted optical lens assemblies face challenges in achieving high resolution, miniaturization, and low cost simultaneously, as increasing the number of lenses to improve resolution often compromises miniaturization and increases production costs.
Innovation Solution
An optical lens assembly comprising five lenses with optimized shapes and refractive powers, including a first lens with negative refractive power and aspheric surfaces, and cemented lenses to correct chromatic aberrations, achieving high resolution and miniaturization while maintaining a low cost structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to improve resolution ability, then the resolution ability of the lens assembly is improved, but the miniaturization characteristics are affected and production costs increase
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices, curvatures, and thicknesses of each lens element. Specifically, the first lens has a negative refractive power with specific curvature relationships (|R1/R2|≤5), and subsequent lenses have controlled refractive powers and Abbe numbers. These parameter optimizations allow five lenses to achieve resolution equivalent to or better than traditional six-or-seven-lens designs while maintaining compact dimensions.
Solution Approach 2:
The patent employs composite material principles by combining lenses with different refractive indices and Abbe numbers to correct chromatic and spherical aberrations. The second lens has a positive refractive power with specific Abbe number constraints, and the third through fifth lenses have coordinated optical properties. This composite approach enables high-resolution imaging with fewer elements, achieving both miniaturization and high resolution simultaneously.
2Measurement precision
If the number of lenses is increased to improve resolution ability, then the resolution ability of the lens assembly is improved, but the production cost increases
Solution Approach 1:
The patent reduces production cost by optimizing the number of lens elements from six or seven to five, while maintaining high resolution through careful parameter selection. The specific curvature ratios (|R1/R2|≤5 for the first lens, |R3/R4|≤5 for the second lens), refractive power distributions, and Abbe number constraints enable cost-effective manufacturing with fewer components, reducing material costs, assembly complexity, and production time.
3Volume of moving object
If the lens assembly is miniaturized to reduce size, then the miniaturization characteristics are improved, but the field-of-view and imaging quality may be compromised
Solution Approach 1:
The patent employs curved surface principles by specifying that the object-side surface of the first lens is a convex surface and the image-side surface is a concave surface, with controlled curvature ratios. The subsequent lenses also have specific surface curvature configurations. These curvature optimizations enable light rays from wide field angles to be properly focused, achieving large field-of-view (≥80° in some embodiments) within a compact lens assembly structure.
Solution Approach 2:
The patent achieves both miniaturization and large field-of-view through coordinated parameter changes across all five lenses. The refractive power distribution, where the first lens has negative power and subsequent lenses have positive or negative powers with specific relationships, enables compact form factor while maintaining wide angular acceptance and high imaging quality across the entire field-of-view.
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 optical lens assembly achieves high resolution, miniaturization, and low production costs, with a compact design that supports large field-of-view and high-definition imaging even in low-light conditions, while reducing sensitivity to environmental factors like temperature changes.
Implementation Method 1
a first lens, having a negative refractive power, an object-side surface of the first lens being a convex surface, and an image-side surface of the first lens being a concave surface; a second lens, having a positive refractive power
Data Source
AI summary
An optical lens assembly and an electronic device comprising same. The optical lens assembly sequentially comprises, from an object side to an image side along an optical axis, a first lens (L1) having a negative refractive power, an object-side surface (S1) of the first lens being a convex surface, and an image-side surface (S2) of the first lens being a concave surface; a second lens (L2) having a positive refractive power, an object-side surface (S3) of the second lens being a convex surface, and an image-side surface (S4) of the second lens being a convex surface; a third lens (L3) having a refractive power; a fourth lens (L4) having a refractive power; and a fifth lens (L5) having a refractive power.