Six-Lens Optical System with Inflected Surface for Aberration Correction
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices fail to meet the requirements for higher resolution and imaging quality, especially for micro filming and night viewing, due to limitations in lens design and aberration correction.
Innovation Solution
The optical image capturing system employs a combination of six-piece optical lenses with specific refractive powers, convex and concave surfaces, and aspheric surfaces to increase lens light and improve imaging quality, incorporating a configuration of six lens elements with positive and negative refractive powers to correct optical and TV distortions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional four-lens or five-lens designs are used, then the device structure is simpler, but the imaging quality and resolution are insufficient for high-performance requirements
Solution Approach 1:
The optical system is divided into six independent lens elements with specific refractive powers (positive or negative), where each element contributes to correcting specific aberrations. This segmentation allows precise control of optical paths and improves overall imaging quality while managing system complexity through modular design
Solution Approach 2:
Different lens elements are assigned specific local functions: some elements focus on correcting spherical aberration, others on coma or distortion. The sixth lens element specifically features an inflected object-side surface to correct off-axis aberrations, applying local quality optimization to specific regions of the optical system
2Manufacturing precision
If more lens elements are added to improve imaging quality, then the aberration correction capability increases, but the system size and weight increase
Solution Approach 1:
The patent optimizes key parameters including the refractive powers of individual elements, the inflection point position on the sixth element's object-side surface, and spacing between elements. These parameter optimizations enable effective aberration correction with a compact six-element design, avoiding the need for heavier, more numerous elements
Solution Approach 2:
The sixth lens element features an inflected object-side surface with specific curvature characteristics that enable effective aberration correction. This sophisticated surface curvature design allows a single element to perform correction functions that would otherwise require multiple additional elements, reducing overall system weight
3Illumination intensity
If the aperture is increased for better low-light performance, then the light gathering ability improves, but the optical aberrations increase
Solution Approach 1:
The sixth lens element is specifically designed with an inflected object-side surface to address off-axis aberrations that become prominent at larger apertures. This local optimization enables the system to maintain low distortion even when the aperture is increased for better low-light performance
Solution Approach 2:
The design converts the potential harm of increased optical aberrations at large apertures into a benefit by using the inflected surface to create favorable optical paths. The inflection point is positioned to specifically counteract the aberrations that would otherwise be introduced by large-aperture operation, enabling both high light gathering and low distortion
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 enhances imaging quality, reduces the size and weight of the optical system, and corrects aberrations, enabling better performance in high-resolution and low-light conditions.
Implementation Method 1
a first lens element with a refractive power, a second lens element with a refractive power, a third lens element with a refractive power, a fourth lens element with a refractive power, a fifth lens element with a refractive power, and a sixth lens element with a refractive power
Data Source
AI summary
An optical image capturing system, in order from an object side to an image side, the optical image capturing system comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element with refractive power has a convex object-side surface. The second through fifth lens elements have a refractive power, and the object-side surface and the image-side surface of the above lens elements are aspheric. The sixth lens element with a negative refractive power has a concave object-side surface, the object-side surface and an image-side surface of the sixth lens element are aspheric, and at least one of the object-side and the image-side surfaces has an inflection point. When satisfying the specific conditions, the optical image capturing system may have a better optical path adjusting ability to acquire better imaging quality.