Nine-Lens Optical Imaging Layout for Chromatic Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for a slim, high-resolution optical imaging system for portable terminals that can integrate multiple functions while maintaining image quality and correcting chromatic aberration.
Innovation Solution
The optical imaging system comprises nine lenses, each with specific refractive powers and Abbe numbers, arranged to satisfy various conditions such as 15<v7−v8<25, 25<v1−v3<45, and |f1/f2|<1.0, along with aspherical surfaces and materials like high refractive index plastics to correct chromatic aberration and improve color characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera module is integrated with more functions and high resolution is achieved, then the image quality is improved, but the size of the portable terminal increases
Solution Approach 1:
The optical imaging system is divided into nine distinct lenses with specific refractive powers and Abbe numbers, allowing each lens to contribute differently to image quality while maintaining a compact overall structure. This segmentation enables high resolution without proportionally increasing the total system size
Solution Approach 2:
The patent specifies precise parameter ranges for each lens including refractive power ratios (e.g., 0.2 < f1/f2 < 1.0, |f3/f| < 0.5), Abbe number differences (e.g., 15 < v7-v8 < 25), and focal length relationships. These parameter optimizations enable high-resolution imaging while controlling the overall system dimensions
2Length of moving object
If the camera module is slimmed down, then the portability is improved, but the resolution and image quality deteriorate
Solution Approach 1:
The patent employs aspherical surfaces on multiple lenses (first through ninth lenses) to correct optical aberrations efficiently within a short optical path. The aspherical design allows for better light control and aberration correction without increasing lens thickness, enabling slim form factor while maintaining high resolution
Solution Approach 2:
The optical system uses lenses with different Abbe numbers (e.g., v7 and v8 differ by 15-25, v1 and v3 differ by 25-45) to correct chromatic aberration. This composite approach with varied material properties enables effective aberration correction in a compact configuration, achieving high resolution without increasing module thickness
3Reliability
If multiple lenses are added to correct chromatic aberration, then the color characteristics are improved, but the device complexity increases
Solution Approach 1:
The patent establishes specific parameter relationships to guide the design: Abbe number differences between adjacent lenses (e.g., 15 < v7-v8 < 25, 25 < v1-v3 < 45), focal length ratios (e.g., 0.2 < f1/f2 < 1.0, |f3/f| < 0.5), and refractive power distributions. These quantified parameters enable systematic chromatic aberration correction while managing the complexity of having nine lenses
Solution Approach 2:
Different lenses in the system have specifically tailored properties: some lenses have positive refractive power while others have negative refractive power, and Abbe numbers are strategically varied across the lens sequence. This local differentiation of optical properties enables effective chromatic aberration correction at each stage of the optical path
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 system achieves high resolution, brightness (Fno < 2.0), wide field of view (>70°), and slim design by effectively correcting aberrations and maintaining refractive power levels across the lenses.
Implementation Method 1
an optical imaging system including a plurality of lenses
Implementation Method 2
correcting chromatic aberration
Data Source
AI summary
An optical imaging system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens, arranged in order from an object side, wherein the first lens and the second lens each have positive refractive power, and 15<v7−v8<25 is satisfied, where v7 indicates an Abbe number of the seventh lens, and v8 indicates an Abbe number of the eighth lens.