Six-Lens Optical System for Aberration Correction and Light Capture
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Solution Overview
Problem
Existing camera modules in mobile communications terminals face limitations in achieving high resolution and performance due to size and weight constraints, necessitating an optical system that improves aberration effects and increases light incidence to enhance image capture quality.
Innovation Solution
An optical system comprising six lenses with specific refractive powers, shapes, and curvatures, including a stop and an image sensor, configured to optimize light transmission and aberration correction, with conditional expressions defining lens parameters such as focal lengths, radii of curvature, and Abbe numbers to enhance image resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the size and weight of mobile communications terminals are reduced, then portability is improved, but the resolution and performance of camera modules deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Abbe numbers of adjacent lenses (|v1-v2|<10, |v2-v3|<10) to manage chromatic aberration, and by optimizing the focal length ratios (f1/f2 between 0.4-1.9, f4/f5 between 4.0-10.0) to improve light transmission and resolution within a compact form factor
Solution Approach 2:
The patent uses composite optical design combining multiple lens elements with different refractive properties (six lenses with specific Abbe number relationships) to achieve superior aberration correction and light transmission efficiency in a space-constrained terminal
2Measurement precision
If the number of lenses is increased to improve resolution, then aberration correction is improved, but device complexity increases
Solution Approach 1:
The patent segments the optical system into six distinct lenses with specific functional assignments: first lens (positive refractive power) for initial light gathering, second and third lenses (negative refractive power) for aberration correction, fourth lens (positive refractive power) for focusing, and fifth and sixth lenses for additional correction and image quality optimization
Solution Approach 2:
The patent optimizes the focal length parameters of each lens (f1-f6) with specific ratio relationships to the overall focal length f, ensuring efficient light transmission and aberration correction while maintaining manageable system complexity through coordinated parameter design
3Measurement precision
If the focal length of individual lenses is optimized to increase light incidence, then resolution is improved, but aberration correction becomes more difficult
Solution Approach 1:
The patent optimizes focal length parameters (f1-f6) with specific ratio relationships to the overall focal length f, while simultaneously controlling Abbe numbers (v1-v6) to manage chromatic aberration, achieving both improved light transmission and aberration correction through coordinated parameter optimization
Solution Approach 2:
The patent employs a composite lens system where adjacent lenses have controlled Abbe number differences (|v1-v2|<10, |v2-v3|<10) to compensate for chromatic aberration introduced by focal length optimization, combining multiple refractive properties to achieve superior overall performance
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 improves aberration performance and increases light incidence, resulting in high-resolution images captured by mobile communications terminals.
Implementation Method 1
an optical system including a first lens; a second lens comprising an object-side surface and an image-side surface, both being convex in a paraxial region
Data Source
AI summary
An optical system includes a first lens having refractive power; a second lens having refractive power, both surfaces thereof being convex in a paraxial region; a third lens having refractive power and having an object-side surface that is convex in the paraxial region; a fourth lens having refractive power; a fifth lens having refractive power and having an image-side surface that is concave in the paraxial region; and a sixth lens having refractive power, wherein the first to sixth lenses are sequentially disposed from an object side, and when an Abbe number of the first lens is v1 and an Abbe number of the second lens is v2, |v1−v2|<10 is satisfied, whereby an aberration improvement effect can be increased, and high resolution in images captured thereby can be realized while an amount of light incident through the lenses to an image sensor can be increased.