Six-Lens Optical System Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing small camera modules with four lenses face difficulties in achieving a clear image due to limitations in refractive power and aberration correction, making it challenging to miniaturize while maintaining high resolution and wide field of view.
Innovation Solution
An optical system comprising six lenses with specific refractive powers and surface configurations, including aspherical surfaces and inflection points, is designed to optimize focal lengths, Abbe numbers, and radii of curvature, ensuring corrected chromatic and spherical aberrations, and allowing for miniaturization while maintaining high resolution and wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lenses is increased from four to six, then image clarity and aberration correction are improved, but device complexity increases
Solution Approach 1:
The optical system divides the imaging function into six separate lens elements, each with specific refractive powers and surface configurations. This segmentation allows each lens to contribute to correcting specific types of aberrations (spherical, chromatic, coma), collectively achieving superior image clarity that cannot be obtained with fewer lenses.
Solution Approach 2:
Each lens element in the six-lens system serves multiple functions: focusing light, correcting spherical aberration, correcting chromatic aberration, and controlling coma. The combination of positive and negative refractive power lenses creates a universal optical system that addresses multiple optical defects simultaneously, justifying the increased complexity through multi-functional performance.
2Reliability
If lens surfaces are made aspherical with inflection points, then aberration correction is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs aspherical surfaces with inflection points on multiple lens elements (first, third, fifth, and sixth lenses). These aspherical configurations allow for more effective correction of spherical aberration and other optical defects compared to traditional spherical surfaces. The inflection points provide additional degrees of freedom in optimizing the optical path, improving overall aberration correction despite increased manufacturing complexity.
Solution Approach 2:
The optical system utilizes specific parameter ranges for refractive powers, Abbe numbers, and radii of curvature to balance aberration correction with manufacturability. By carefully selecting and constraining these parameters within defined ranges, the system achieves reliable aberration correction while maintaining practical manufacturing precision requirements.
3Measurement precision
If focal length ratios are optimized, then field of view and resolution are improved, but device miniaturization becomes more difficult
Solution Approach 1:
The patent defines specific parameter ranges for focal lengths and their ratios to achieve optimal balance between resolution, field of view, and optical system length. By carefully controlling the focal length ratios and other optical parameters within defined ranges, the system maintains high resolution and wide field of view while enabling miniaturization of the overall device.
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 optical system effectively corrects aberrations and miniaturizes the camera module, enabling high-resolution imaging with a wide field of view, suitable for small portable terminals.
Implementation Method 1
an optical system including lenses having refractive power
Data Source
AI summary
An optical system includes a first lens including a negative refractive power and a convex object-side surface, a second lens, and a third lens including a negative refractive power and a convex object-side surface. The optical system also includes a fourth lens, a fifth lens including a negative refractive power, and a sixth lens including a negative refractive power and comprising an inflection point on an image-side surface thereof. The first to sixth lenses are sequentially disposed from an object toward an imaging plane.