Optical Imaging Lens with Seven or Eight Elements for Vehicle Thermal Stability
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Solution Overview
Problem
Optical imaging lenses for vehicles face challenges in achieving good thermal stability and wide viewing angles while maintaining high imaging quality, which are essential for diverse applications such as parking sensors, panoramic cameras, and advanced driver assistance systems.
Innovation Solution
The design of an optical imaging lens comprising multiple lens elements with specific refracting powers and surface curvatures, including a configuration of first to eighth lens elements with particular thicknesses and distances along the optical axis, optimized to satisfy specific numerical conditions that enhance thermal stability and imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of lens elements is increased to improve imaging quality and thermal stability, then imaging quality and thermal stability are improved, but device complexity increases
Solution Approach 1:
The optical imaging lens is divided into multiple lens elements (seven or eight elements) with different refractive powers and surface curvatures. Each lens element is designed with specific functions: negative refractive power elements for field curvature correction, positive refractive power elements for focal length control, and specific surface curvature configurations for aberration correction. This segmentation allows the system to achieve good thermal stability and imaging quality across different temperatures while managing complexity through functional specialization of each element.
2Measurement precision
If the number of lens elements is increased to improve imaging quality, then imaging quality is improved, but device complexity increases
Solution Approach 1:
Different lens elements are designed with specific local qualities: the first and second lens elements have negative refractive powers for field curvature correction, the third lens element has a concave object-side surface for aberration control, the fourth and fifth lens elements have convex object-side surfaces for focal length management, and the sixth and seventh lens elements have specific configurations for image quality optimization. This local quality approach ensures each element contributes specifically to overall imaging quality while maintaining manageable system complexity.
3Adaptability or versatility
If lens elements are optimized for wide viewing angle, then viewing angle is widened, but thermal stability may be compromised
Solution Approach 1:
The lens elements are designed with specific parameter configurations: the first lens element has negative refractive power with specific curvature radii, the second lens element has negative refractive power with optimized surface curvatures, the third lens element has a concave object-side surface with specific radius of curvature, the fourth and fifth lens elements have convex object-side surfaces with optimized parameters, and the sixth and seventh lens elements have configurations that maintain thermal stability. These parameter optimizations enable the system to achieve wide viewing angles while maintaining good thermal stability across different temperature conditions.
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 an optical imaging lens with improved thermal stability, wide viewing angles, and superior imaging quality, effectively addressing the demands of vehicle-based applications by optimizing lens element arrangements and material selection.
Implementation Method 1
Each first lens element, second lens element, third lens element, fourth lens element, fifth lens element, sixth lens element, seventh lens element and eighth lens element respectively has an object-side surface which faces toward the object-side and allows imaging rays to pass through as well as an image-side surface which faces toward the image-side and allows the imaging rays to pass through
Data Source
AI summary
In an optical imaging lens, a first lens element has negative refracting power, a second lens element has negative refracting power, an optical axis region of the object-side surface of the third lens element is concave, an optical axis region of the object-side surface of the fourth lens element is convex, an optical axis region of the object-side surface of the fifth lens element is convex, a sixth lens element is arranged to be a lens element in a second order from an image-side to an object-side and a seventh lens element is arranged to be a lens element in a first order from the image-side to the object-side to satisfy: (G23+T3+T4+G45)/L57≥2.700 and 1+2≤80.000.