Four-Lens Optical System Aberration Correction via Inflection Points
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Solution Overview
Problem
Conventional optical image capturing systems for portable electronic devices face challenges in balancing high pixel density, image quality, and minimization, particularly with increased pixel density leading to issues like aberration and distortion, especially in large aperture and wide-angle views.
Innovation Solution
The system employs a combination of four optical lenses with specific refractive powers and surface geometries to increase light admission and angle of view, incorporating inflection points on the fourth lens to adjust incident angles and correct optical distortions, while controlling lens thickness and spacing to enhance aberration correction and manufacturing feasibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture of the optical image capturing system is increased to meet high pixel density requirements, then the amount of light admitted increases, but optical aberration increases resulting in deterioration of peripheral image quality
Solution Approach 1:
The optical system is divided into multiple lenses (first lens, second lens, third lens, and fourth lens) with different refractive powers and surface geometries. Each lens segment contributes to correcting specific types of aberrations, allowing the system to maintain high light admission while controlling optical aberration through distributed correction functions.
Solution Approach 2:
The patent employs asymmetric surface geometries including convex and concave surfaces with different curvatures on each lens. The fourth lens specifically uses inflection points on its surfaces to create asymmetric light path control, which corrects peripheral aberrations while preserving central image quality and maintaining large aperture capability.
2Area of stationary object
If the angle of view is increased to meet wide angle requirements, then the field of view expands, but distortion rate in image formation increases
Solution Approach 1:
The patent utilizes curved surfaces including convex and concave geometries on multiple lenses to control light paths at wide angles. The inflection points on the fourth lens create specific curvature variations that counteract distortion effects, enabling wide angle of view while maintaining geometric accuracy in image formation.
3Volume of moving object
If the number of optical lenses is reduced to minimize the system, then the device size decreases, but the ability to correct aberration and maintain image quality deteriorates
Solution Approach 1:
Each lens in the four-lens system is designed to perform multiple functions: the first lens provides initial light gathering and basic focusing, the second lens contributes to aberration correction, the third lens continues the correction process, and the fourth lens with inflection points provides final distortion correction and sharpens peripheral images. This multi-functional design allows compact size while maintaining comprehensive aberration correction capabilities.
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
This configuration achieves improved image quality and higher pixel counts while maintaining a minimized form factor, effectively addressing the limitations of conventional systems by enhancing light intake and correcting optical distortions, thus supporting advanced photography requirements.
Implementation Method 1
combination of refractive powers, convex and concave surfaces of four optical lenses to increase the amount of light admitted into the optical image capturing system and angle of view
Data Source
AI summary
An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has positive refractive power and the object side thereof may be a convex surface. The second lens and the third lens both have refractive power and the object side and the image side of the second lens and the third lens are all aspheric. The fourth lens may have negative refractive power, the image side of the fourth lens may be a concave surface, and the object side and the image side thereof are both aspheric. When meeting some certain conditions, the optical image capturing system may have outstanding light-gathering ability and an adjustment ability about the optical path in order to elevate the image quality.