Six-Element Optical Imaging Lens for Vehicle Cameras
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Solution Overview
Problem
The challenge is to design a miniaturized optical imaging lens for vehicles that maintains high imaging quality while achieving a large aperture and wide field of view with a short lens length, which is not achievable by simply scaling down traditional lenses due to material properties and manufacturing complexities.
Innovation Solution
The optical imaging lens is composed of specific lens elements with controlled refracting power and surface curvatures, including a first lens element with positive refracting power, a second lens element with negative refracting power, and subsequent elements with convex and concave regions, arranged to satisfy conditions such as HFOV≤45°, 2.000≤D1/D2, and TTL/T6≤6.300, optimizing the lens configuration for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional lens is simply scaled down to achieve miniaturization, then the lens size is reduced, but the imaging quality deteriorates due to material properties and manufacturing limitations
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive indices, curvatures, and thicknesses of six different lens elements. Each lens element has specific optical parameters (refractive index n, Abbe number V, curvature radii r1-r6, thickness d1-d6) that are optimized to maintain high imaging quality in a miniaturized form factor. The conditional expressions (1) through (6) define specific parameter ranges that resolve the contradiction between small size and high precision imaging.
Solution Approach 2:
The patent uses composite material principles by combining six different lens elements made of materials with different optical properties. Each lens element has specifically selected refractive index and Abbe number values, creating a composite optical system where the materials work together to correct aberrations and maintain imaging quality despite the reduced overall size of the lens assembly.
2Reliability
If the lens elements are arranged to achieve a large aperture and wide field of view, then the optical performance is improved, but the lens length increases
Solution Approach 1:
The patent applies dimensionality change by utilizing the radial dimension more effectively through asymmetric surface curvatures. The lens elements have different curvature radii for object-side and image-side surfaces (r1≠r2, r3≠r4, etc.), allowing light rays to be bent more efficiently in the radial direction. This enables a wider field of view and larger aperture without proportionally increasing the axial length of the lens assembly.
Solution Approach 2:
The patent optimizes the conditional expressions (3) through (6) which control the ratios of curvature radii and thicknesses of lens elements. These parameter changes allow the lens to achieve a compact design where the effective aperture and field of view are maximized relative to the total lens length, resolving the contradiction between optical performance and physical size.
3Manufacturing precision
If the lens configuration is optimized for high imaging quality, then the optical performance is improved, but the manufacturing and assembling yield rates decrease
Solution Approach 1:
The patent divides the optical system into six separate lens elements with progressively increasing complexity. The first three lens elements have simpler curvature profiles while the fourth, fifth, and sixth elements have more complex asymmetric surfaces. This segmentation allows manufacturing to proceed step-by-step with quality control at each stage, improving overall yield rate while achieving high final imaging quality through the combined effect of all elements.
Solution Approach 2:
The patent defines specific parameter ranges and conditional expressions that balance manufacturing feasibility with optical performance. The curvature radii, thicknesses, and refractive indices are chosen to be within practical manufacturing tolerances while still achieving superior imaging quality. This resolves the contradiction by finding parameter values that are both optically optimal and manufacturable with high yield rates.
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 a desirable optical performance with a large field of view and short system length, effectively addressing the limitations of traditional miniaturized lenses by enhancing imaging quality and manufacturing yield rates.
Implementation Method 1
Each of the lens elements has an object side surface facing toward the object side and allowing an imaging ray to pass through and an image side surface facing toward the image side and allowing the imaging ray to pass through
Data Source
AI summary
An optical imaging lens sequentially includes a first, a second, a third, a fourth, a fifth, and a sixth lens elements from an object side to an image side along an optical axis. Each of the lens elements includes an object-side surface and an image-side surface. The second lens element has negative refracting power. A periphery region of the object-side surface of the fourth lens element is convex. A periphery region of the image-side surface of the fifth lens element is convex. The optical imaging lens satisfies following conditions: HFOV≤45°; 2.000≤D1/D2, and TTL/T6≤6.300.