Four-Lens Optical System Aberration Control
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Solution Overview
Problem
Conventional optical image capturing systems in portable electronic devices face challenges in balancing high pixel density, image quality, and the need for large aperture or wide angle of view, often resulting in aberrations and manufacturing difficulties.
Innovation Solution
The optical image capturing system employs a combination of four optical lenses with refractive power, convex and concave surfaces, and positioning elements to enhance light admission and angle of view, while minimizing lens thickness, thereby improving image quality and accommodating miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to improve light admission and angle of view, then the image quality and photography functionality are improved, but optical aberrations increase and manufacturing difficulty increases
Solution Approach 1:
The optical system is divided into multiple lens elements (first lens, second lens, third lens, fourth lens) with different refractive powers and surface characteristics. Each lens segment handles specific optical functions, allowing the system to achieve large aperture and wide angle of view while controlling aberrations through coordinated design of individual segments.
Solution Approach 2:
Different regions of the optical system have specialized properties: the first lens has positive refractive power with convex surfaces for light gathering, the second lens has negative refractive power for aberration correction, the third lens has positive refractive power for focal adjustment, and the fourth lens has negative refractive power for final aberration control. This local specialization enables the system to overcome the manufacturing difficulties of single-lens large aperture designs.
2Illumination intensity
If the aperture is increased to improve light admission, then the angle of view is improved, but optical aberrations increase and peripheral image quality deteriorates
Solution Approach 1:
The second lens and fourth lens act as intermediary elements with negative refractive power that specifically correct optical aberrations introduced by the positive refractive power lenses. These intermediary lenses compensate for peripheral distortion and aberration, ensuring high image quality across the entire field of view while maintaining the large aperture for improved light admission.
3Length of stationary object
If the number of optical lenses is reduced to minimize system thickness, then the device size is reduced, but the ability to balance aperture, angle of view, and image quality deteriorates
Solution Approach 1:
The optical system merges multiple lens elements with different functions into a compact stacked configuration. The first, second, third, and fourth lenses are arranged in sequence along the optical axis with minimal spacing, combining light gathering, aberration correction, and focal adjustment functions within a thin profile suitable for portable electronic devices.
4Manufacturing precision
If the pixel density is increased to meet high imaging quality requirements, then the resolution is improved, but the demand for large aperture and wide angle of view increases
Solution Approach 1:
The optical system is designed to serve multiple photography functions simultaneously: the first lens provides light gathering for low-light photography, the second lens corrects aberrations for high-resolution imaging, the third lens adjusts focus for various distances, and the fourth lens optimizes peripheral quality for wide-angle shots. This multi-functional design enables high pixel density sensors to achieve excellent imaging quality across diverse photography scenarios.
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 effectively increases the angle of view, enhances relative illuminance, and improves image quality, addressing the limitations of conventional systems in meeting advanced photography requirements.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens... in order along an optical axis from an object side to an image side
Data Source
AI summary
An optical image capturing system is provided. In 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 a refractive power and the object side thereof may be convex. The second lens and the third lens have refractive power. The object side and the image side of the foregoing lenses may be aspheric. The fourth lens may have positive refractive power. The object side and the image side thereof are aspheric. At least one of surfaces of the fourth lens may have one inflection point. The four lenses have refractive power. 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.