Six-Piece Aspheric Lens System for High-Resolution Mobile Imaging
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Solution Overview
Problem
Conventional miniaturized optical lens systems with four lens elements fail to meet the increasing demands for higher resolution, wide field of view, big stop, high pixel, and low height requirements due to advancements in semiconductor manufacturing and pixel size reduction in mobile phone cameras.
Innovation Solution
A six-piece optical lens system comprising specific refractive power lens elements with aspheric surfaces, carefully arranged to maintain a compact total track length, including a stop, first to sixth lens elements with positive and negative refractive powers, and optimized focal length ratios to achieve improved resolution and field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional four-piece optical lens system is used, then the device complexity is low, but the image quality and resolution cannot satisfy high pixel size reduction requirements
Solution Approach 1:
The optical lens system is divided into six distinct lens elements with specific refractive powers and aspheric surface characteristics. Each lens element is segmented to perform specific optical functions, allowing the system to achieve high image quality while managing complexity through functional decomposition.
Solution Approach 2:
The patent specifies precise parameter ranges for focal length ratios (f1/f2, f2/f3, f3/f4, f4/f5, f5/f6) and aspheric surface coefficients to optimize image quality. By carefully controlling these parameters within defined ranges, the system achieves high resolution without excessive complexity.
2Length of moving object
If the total track length is reduced for compact design, then the device size is reduced, but the field of view and resolution performance may be compromised
Solution Approach 1:
The six lens elements are arranged in a compact nested configuration where each lens is positioned to optimize space utilization. The aspheric surfaces are designed to work together in a nested arrangement that achieves both compact total track length and wide field of view without sacrificing resolution.
3Measurement precision
If more lens elements are added to improve resolution, then the image quality improves, but the total track length increases
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements (first, second, third, fourth, fifth, and sixth lens elements all have aspheric surfaces) to correct optical aberrations and improve resolution. The aspheric curvature allows for compact lens spacing while maintaining high image quality, preventing total track length increase despite adding more lens elements.
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 six-piece optical lens system provides enhanced image quality, wide field of view, high pixel resolution, and low height while maintaining a compact design, effectively addressing the limitations of conventional four-piece systems.
Implementation Method 1
a first lens element with a positive refractive power having a convex object-side surface, at least one of the object-side and an image-side surfaces of the first lens element being aspheric
Data Source
AI summary
A six-piece optical lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power has a convex object-side surface; a second lens element with a negative refractive power has a convex object-side surface; a third lens element with a positive refractive power has a concave image-side surface; a fourth lens element with a negative refractive power has a concave image-side surface; a fifth lens element with a positive refractive power has a convex object-side surface; a sixth lens element with a negative refractive power has a concave object-side surface, and at least one of object-side and image-side surfaces of each lens element is aspheric. Thereby, such a system can be applied to a high resolution mobile phone.