Six-Lens Optical Assembly for Vehicle-Mounted Autonomous Driving
Solution Overview
Problem
Vehicle-mounted optical lens assemblies for autonomous driving systems face challenges in maintaining clear images across varying temperature conditions and require improved imaging quality, light transmission, and miniaturization while avoiding ghost images and maintaining high resolution.
Innovation Solution
An optical lens assembly comprising six lenses with specific refractive powers and surface shapes, including a first lens with negative refractive power and concave image-side surface, a second lens with negative refractive power and concave object-side surface, and a third lens with positive refractive power and convex surfaces, optimized for a total effective focal length and field-of-view to achieve miniaturization, high resolution, and temperature stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional lens assembly is used, then the structure is simple, but the imaging quality deteriorates in high and low temperature environments
Solution Approach 1:
The lens assembly is divided into six individual lenses with specific refractive powers and surface shapes. Each lens is optimized to compensate for temperature-induced aberrations, allowing the system to maintain clear imaging across temperature variations while managing complexity through modular design
Solution Approach 2:
The patent specifies precise parameters for each lens including refractive power, surface curvature, and thickness. By carefully controlling these parameters, the lens assembly achieves temperature stability without requiring complex mechanical adjustments or additional components
2Volume of moving object
If the front-end diameter is reduced for miniaturization, then the device size decreases, but the light transmission capability deteriorates
Solution Approach 1:
The patent employs curved surfaces on multiple lenses, particularly the concave image-side surface of the first lens and the convex-concave configuration of the second lens. These curved surfaces enable effective light focusing and transmission through a compact aperture, achieving miniaturization while maintaining adequate light gathering capability
Solution Approach 2:
The lens assembly uses different lens materials with varying refractive indices and refractive powers. This composite approach allows optimization of light transmission paths and focal characteristics within a compact diameter, improving light transmission efficiency without increasing the front-end diameter
3Measurement precision
If the refractive power is increased for higher resolution, then the imaging quality improves, but the field-of-view decreases
Solution Approach 1:
The total refractive power is distributed across six separate lenses rather than concentrated in a single high-power element. This segmentation allows the system to achieve high resolution through cumulative refractive effect while maintaining a wide field-of-view by preventing any single lens from having excessive power that would narrow the angular acceptance
Solution Approach 2:
The patent utilizes the third dimension (depth along the optical axis) by arranging lenses in a stacked configuration with varying thicknesses and positions. This spatial arrangement allows the system to achieve high resolution through multiple refraction events while preserving field-of-view by optimizing the optical path length and focal plane positioning
4Reliability
If the image plane is fixed, then the structure is simple, but the image becomes blurred when temperature changes cause deviation
Solution Approach 1:
The lens design incorporates temperature-compensating parameters in the refractive power and surface curvature of each lens element. These parameter optimizations allow the optical system to automatically maintain proper focus across temperature variations without requiring mechanical focus adjustment mechanisms, ensuring image clarity while keeping the structure simple
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 solution provides a lens assembly with high resolution, miniaturization, and robust temperature performance, eliminating ghost images and ensuring clear imaging across temperature variations, while maintaining a large field-of-view and low sensitivity.
Implementation Method 1
an optical lens assembly comprising six lenses with specific refractive powers and surface shapes... a first lens with negative refractive power... a second lens with negative refractive power... a third lens with positive refractive power
Data Source
AI summary
Disclosed by the present application are an optical lens and an electronic device comprising the optical lens. The optical lens comprises in succession from an object side to an image side along an optical axis: a first lens provided with a negative focal power, the image side surface of which is concave; a second lens provided with a focal power, the object side surface of which is concave and the image side surface of which is convex; a third lens provided with a positive focal power, the object side surface of which is convex and the image side surface of which is convex; a fourth lens provided with a focal power, the object side surface of which is convex; a fifth lens provided with a focal power, the image side surface of which is convex; and a sixth lens provided with a focal power.