Seven-Lens Camera Optical System with Aberration Control
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Solution Overview
Problem
There is a need for a camera optical lens with excellent optical characteristics, large aperture, wide-angle, and ultra-thinness suitable for handheld devices, particularly smartphones and web cameras, which current multi-piece lens structures struggle to achieve effectively.
Innovation Solution
A seven-piece lens structure is designed with specific refractive power and curvature radius relationships between each lens, including a first lens made of glass and subsequent lenses made of plastic, optimizing focal lengths, curvature radii, and thickness to achieve the desired optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-piece lens structure is adopted to improve imaging quality, then optical performance is improved, but device complexity and size increase
Solution Approach 1:
The patent applies parameter changes by establishing specific mathematical relationships between focal lengths (f3/f4, f5/f6) and curvature radii (R2/R3) of different lens elements. These parameter constraints optimize the optical performance while controlling the complexity of the multi-piece structure, allowing the seven-lens system to achieve excellent imaging quality without excessive complexity.
2Volume of moving object
If lens miniaturization is pursued to reduce device size, then portability is improved, but optical performance and aberration correction deteriorate
Solution Approach 1:
The patent uses parameter changes by defining specific ratios for focal lengths and curvature radii that enable miniaturization while maintaining optical performance. The constraints on f3/f4, f5/f6, R2/R3, and other parameters allow the lens system to be compact yet still correct aberrations effectively and maintain good imaging quality.
Solution Approach 2:
The patent employs composite materials by combining glass and plastic materials for different lens elements. This allows optimization of each element's properties - glass for elements requiring high precision and specific refractive characteristics, and plastic for elements where weight reduction and manufacturing flexibility are priorities - thereby achieving miniaturization without sacrificing optical performance.
3Area of stationary object
If wide-angle design is implemented to increase field of view, then imaging coverage is improved, but distortion and aberrations increase
Solution Approach 1:
The patent applies parameter changes by establishing specific relationships between the focal lengths and curvature radii of the seven lens elements. These parameter constraints are designed to control and correct distortion and aberrations inherent in wide-angle designs, allowing the system to achieve a wide field of view while maintaining good optical quality and minimizing harmful distortions.
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 camera optical lens provides excellent imaging quality with a large aperture, wide-angle, and ultra-thin design, effectively correcting aberrations and meeting the requirements for high-pixel camera components like CCD and CMOS, while maintaining miniaturization.
Implementation Method 1
a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power
Data Source
AI summary
The present disclosure relates to a technical field of optical lenses, and discloses a camera optical lens. The camera optical lens includes seven lenses. An order of the seven lenses is sequentially from an object side to an image side, which is shown as follows: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, and a seventh lens having a negative refractive power. The camera optical lens provided by the present disclosure has excellent optical characteristics, and further has characteristics of large aperture, wide-angle, and ultra-thin, especially suitable for mobile phone camera lens assemblies and WEB camera lenses, which are composed of camera components having high pixels, such as CCD.