Seven-Lens Optical System Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems in portable electronic devices face challenges in capturing high-quality images in low-light environments due to limited light intake and aberrations, particularly in compact designs with multiple lenses.
Innovation Solution
A compact optical image capturing system utilizing a seven-piece optical lens configuration with refractive powers, convex and concave surfaces, and inflection points to optimize light entry and correct aberrations, featuring specific lens parameters and aspheric surfaces to enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems use five or six lenses to achieve high optical performance, then imaging quality is improved, but the system size and complexity increase
Solution Approach 1:
The patent divides the optical system into seven distinct lens elements with specific refractive powers and surface characteristics. Each lens element is optimized for specific functions (e.g., first lens with positive refractive power for light gathering, second lens with negative refractive power for aberration correction), allowing the system to achieve high imaging quality while maintaining a compact seven-element configuration rather than using more lenses
Solution Approach 2:
The patent applies local quality by giving different lens elements specific local characteristics tailored to their positions and functions in the optical path. For example, the object-side surface of the first lens is made convex to maximize light intake, while the image-side surface of the seventh lens is made concave to control light convergence. Each lens element has customized refractive power, surface curvature, and aspheric coefficients to address specific optical requirements at that location, achieving overall high imaging quality through localized optimization
2Illumination intensity
If the optical system uses a large aperture to increase light intake for dark environment photography, then light gathering capability is improved, but aberrations increase
Solution Approach 1:
The patent converts the harmful effect of large aperture-induced aberrations into a benefit by strategically placing inflection points on specific lens surfaces (object-side surface of the fourth lens and image-side surface of the fifth lens). These inflection points create localized surface curvature changes that counteract the spherical and coma aberrations naturally produced by the large aperture, allowing the system to maintain both high light intake and low aberrations
Solution Approach 2:
The patent employs parameter changes by optimizing the inflection point positions, surface curvatures, and aspheric coefficients of the lens elements based on the large aperture configuration. The object-side surface of the first lens is designed with a convex shape and specific curvature radius to maximize light gathering, while subsequent lenses have their parameters (refractive power, surface curvature, thickness) precisely adjusted to correct the aberrations introduced by the large aperture, achieving a balance between light intake and imaging quality
3Length of moving object
If the optical system is compacted for portable electronic devices, then device size is reduced, but light intake and imaging quality deteriorate
Solution Approach 1:
The patent achieves compactness by nesting the seven lens elements in a tightly integrated configuration where each lens element is positioned close to the next, minimizing the overall optical path length. The lens elements are arranged in a nested sequence from the object-side surface of the first lens to the image-side surface of the seventh lens, with minimal spacing between elements, allowing the system to maintain a compact form factor while incorporating multiple optical elements necessary for high light intake and aberration correction
Solution Approach 2:
The patent utilizes aspheric surfaces with inflection points to achieve compactness in the optical path direction (one dimension) while maintaining light gathering capability. The inflection points on the object-side surface of the fourth lens and image-side surface of the fifth lens create three-dimensional surface variations that efficiently correct aberrations without requiring additional lens elements or increased system length, effectively using dimensional complexity of the lens surfaces to compensate for the reduced system size
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 effectively increases light intake and improves imaging quality, reducing aberrations and size, while maintaining compactness for portable electronic devices.
Implementation Method 1
an optical image capturing system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an image plane from an object side to an image side... Each of the first lens to the seventh lens has refractive power
Data Source
AI summary
An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. At least one lens among the first to the sixth lenses has positive refractive power. The seventh lens can have negative refractive power, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the seventh lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.