Four-Lens Imaging System Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance among high image quality, low sensitivity, proper aperture size, miniaturization, and a desirable field of view.
Innovation Solution
The proposed imaging lens system consists of four lens elements with specific refractive powers and surface curvatures, including negative and positive refractive powers, convex and concave surfaces, and inflection points on lens surfaces, optimized by conditions such as central thickness ratios, focal length relationships, and axial distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical systems are designed to achieve high image quality, then image quality is improved, but the system becomes larger and more complex
Solution Approach 1:
The optical system is divided into four distinct lens elements, each with specific refractive powers and surface curvatures. This segmentation allows each element to contribute to correcting specific aberrations, achieving high image quality while keeping individual elements relatively simple in design
Solution Approach 2:
Different regions of the lens surfaces are designed with different curvatures and refractive properties. For example, the first lens element has a convex object-side surface and concave image-side surface, while the fourth lens element has convex surfaces on both sides. This local variation in optical properties enables precise control of light paths to improve image quality without requiring a larger overall system
2Volume of moving object
If the optical system is miniaturized, then the device size is reduced, but it becomes difficult to achieve high image quality and proper aperture size
Solution Approach 1:
The four lens elements are arranged in a compact sequence from object side to image side, with each element positioned closely to its neighbors. This nested arrangement minimizes the overall axial length of the optical system while maintaining the necessary optical power distribution and separation between elements to achieve high image quality
Solution Approach 2:
The patent specifies precise parameter relationships, such as the focal length ratios between lens elements and the axial distances between them. By optimizing these parameters, the system achieves miniaturization while maintaining proper aperture size and high image quality, resolving the trade-off between size and performance
3Adaptability or versatility
If the optical system is designed for multi-functionality, then functionality requirements are increased, but it becomes difficult to balance image quality, sensitivity, aperture size, and field of view
Solution Approach 1:
The four-lens-element configuration is designed to simultaneously achieve multiple objectives: high image quality through aberration correction, low sensitivity to misalignment through robust optical design, proper aperture control, miniaturization, and a desirable field of view. Each lens element contributes to multiple performance aspects, making the system universally applicable to various electronic device applications
Solution Approach 2:
The optical system is designed with flexible parameters that can be adjusted to optimize performance for different applications. The specific curvature radii, thicknesses, and spacing of the four lens elements can be modified while maintaining the overall design principles, allowing the system to adapt to different functionality requirements while preserving image quality and other performance characteristics
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 enhances image quality, improves mechanical strength, and achieves a compact design while maintaining a wide detection range and accurate image identification.
Implementation Method 1
The first lens element has negative refractive power. The fourth lens element has positive refractive power.
Data Source
AI summary
An imaging lens system includes four lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element, and each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has negative refractive power. The fourth lens element has positive refractive power, and the image-side surface of the fourth lens element is convex in a paraxial region thereof. At least one lens element of the imaging lens system has at least one lens surface having at least one inflection point.