Eight-Lens Imaging Optics for Compact Aberration Control
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, proper aperture size, miniaturization, and a desirable field of view, making it difficult to meet the increasing functionality requirements of electronic devices.
Innovation Solution
An imaging lens system comprising eight lens elements with specific refractive powers and surface configurations, including inflection points, is designed to optimize light path control and aberration correction, featuring a range of conditions for focal lengths, entrance pupil diameters, and axial distances to achieve a compact and high-quality imaging solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality and reduce aberrations, then image quality improves, but the system size and complexity increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe numbers of lens elements (Vmin≥20, V8≥25), focal length ratios (0.10≤f/f1≤0.50), and axial distances (0.05≤BL/TD≤0.40). These parameter constraints optimize the balance between image quality and system complexity by selecting specific refractive index ranges and geometric configurations that reduce aberrations without requiring excessive lens elements.
Solution Approach 2:
The patent segments the optical system into eight distinct lens elements with specific functional assignments. Each lens element (L1-L8) has defined refractive power and Abbe number characteristics, allowing independent optimization of aberration correction while maintaining overall system compactness. The segmentation enables targeted correction of different types of aberrations by different lens groups.
2Illumination intensity
If the aperture size is increased to improve light gathering capability, then image brightness improves, but the system size increases
Solution Approach 1:
The patent controls the entrance pupil diameter relative to the axial distance (EPD/TD ratio) and optimizes the back focal length (BL) to achieve compact dimensions while maintaining adequate light gathering. The specific parameter ranges for focal length ratios and axial distances enable high brightness without proportionally increasing system volume.
3Adaptability or versatility
If the field of view is increased to expand coverage area, then functionality improves, but aberrations increase
Solution Approach 1:
The patent controls half of the maximum field of view (HFOV) within specific ranges and optimizes the focal length to field of view ratio (f/HFOV). The constrained parameter ranges for lens element positions, focal lengths, and Abbe numbers enable expanded field of view while maintaining aberration correction through precise geometric and material parameter selection.
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 enables a compact imaging lens system that balances image quality, sensitivity, and field of view, effectively addressing the limitations of conventional systems by providing improved image brightness and reduced aberrations within a limited space.
Implementation Method 1
The first lens element has positive refractive power. Each of the eight lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.
Data Source
AI summary
An imaging lens system includes eight 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, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one lens element of the imaging lens system has at least one lens surface having at least one inflection point. The imaging lens system has a total of eight lens elements.