Six-Lens Optical System with Aspheric Surfaces for Height Reduction
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Solution Overview
Problem
Traditional optical image capturing systems in portable electronic devices struggle to meet the requirements of high resolution and imaging quality, particularly in terms of reducing the height of the optical system while maintaining high pixel density and correcting aberrations for advanced camera functionalities.
Innovation Solution
The optical image capturing system employs a combination of six-piece optical lenses with specific refractive powers and aspheric surfaces to minimize the height and enhance imaging quality, utilizing a configuration of refractive powers and aspheric surfaces to correct optical and TV distortions, and inflection points on lens surfaces to adjust the angle of incidence effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a traditional four-lens or five-lens design is used, then the optical system can be manufactured with conventional complexity, but the height of the optical system cannot be sufficiently reduced and imaging quality at eight million pixels cannot be achieved
Solution Approach 1:
The optical system is divided into six separate lens elements instead of four or five, with each element having specific refractive powers and aspheric surfaces. This segmentation allows for better control of optical paths and aberration correction while reducing the overall system height
Solution Approach 2:
Aspheric surfaces are applied to multiple lens elements (first, second, third, fourth, and sixth lens elements have aspheric object-side or image-side surfaces). This curvature variation enables more precise focusing and aberration correction, improving imaging quality at high pixel densities while allowing for a more compact design
2Manufacturing precision
If the number of lens elements is increased to six pieces, then imaging quality and aberration correction are improved, but the device complexity increases
Solution Approach 1:
Specific refractive power parameters are assigned to each lens element (first: positive, second: negative, third: positive, fourth: negative, fifth: positive, sixth: negative) with defined focal length relationships (0.3<f1/|f6|<0.8). These parameter specifications enable precise control of optical performance and aberration correction while maintaining manufacturing feasibility
Solution Approach 2:
The system combines lens elements with different refractive properties and aspheric characteristics into a composite optical structure. This composite approach allows each element to contribute specific optical functions, achieving high imaging quality through the synergistic combination of multiple materials and surface geometries
3Manufacturing precision
If aspheric surfaces and inflection points are used on lens elements, then optical distortions and TV distortions are corrected effectively, but the manufacturing difficulty increases
Solution Approach 1:
Aspheric surfaces with inflection points are implemented on multiple lens elements to correct spherical aberration, coma, and distortion. The inflection points provide additional degrees of freedom for optimizing optical performance while the specific aspheric coefficients are designed to balance manufacturing capabilities with correction effectiveness
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 reduces the height of the optical system, improves imaging quality to eight million pixels, and corrects aberrations, making it suitable for minimized electronic products with high pixel density and advanced camera functionalities.
Implementation Method 1
Optical image capturing system employs a combination of six-piece optical lenses with specific refractive powers and aspheric surfaces
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 a 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 these lens elements are aspheric. The sixth lens element with a negative refractive power has a concave object-side surface, the object-side surface and the image-side surface are aspheric, and at least one of the object-side and the image-side surfaces has an inflection point. When satisfying specific conditions, the compact optical image capturing system receives lights effectively and reduces the height of the optical system, so as to acquire better imaging quality.