Six-Piece Optical Lens System Aberration Control
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Solution Overview
Problem
Conventional five-piece optical lens systems fail to meet the increasing demand for higher resolution and imaging quality in portable electronic devices, particularly due to their inability to balance miniaturization with big stop and high image quality requirements.
Innovation Solution
A six-piece optical lens system is designed with specific refractive power distributions and aspheric surfaces for each lens element, including a stop, to achieve a balance of refractive power, reduce aberration, and enhance imaging quality while maintaining miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional five-piece optical lens systems are used, then the device structure is simple, but the imaging quality and resolution cannot meet higher demands
Solution Approach 1:
The optical lens system divides the imaging function into six distinct lens elements with alternating positive and negative refractive powers, allowing each element to contribute specifically to correcting different types of optical aberrations. This segmentation enables superior imaging quality that cannot be achieved with conventional five-piece systems.
2Manufacturing precision
If conventional six-piece optical lens systems are designed with big stop and high image quality, then imaging performance is improved, but the total track length becomes too long
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements with specifically designed curvature parameters and conic constants. These parameter optimizations allow the system to achieve high imaging quality with a compact total track length of 3.89mm, resolving the contradiction between image quality and miniaturization.
Solution Approach 2:
The system utilizes aspheric surfaces instead of spherical surfaces on several lens elements, enabling more efficient light ray control and aberration correction. This curvature optimization reduces the overall system length while maintaining big stop (Fno=2.0) and high image quality characteristics.
3Manufacturing precision
If more lens elements are added to improve imaging quality, then resolution and aberration correction are enhanced, but the system becomes more complex and larger
Solution Approach 1:
Each lens element is designed with specific local optical properties - alternating positive and negative refractive powers are strategically assigned to different elements. The aspheric surfaces are selectively applied to specific elements based on their local aberration correction needs, optimizing the overall system performance without unnecessary complexity.
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 achieves a wide field of view, high pixel density, and low height, improving imaging quality and resolution while reducing sensitivity and aberration, making it suitable for thin electronic products.
Implementation Method 1
a first lens element with a positive refractive power, having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the first lens element being aspheric
Implementation Method 2
a sixth lens element with a negative refractive power having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the sixth lens element being aspheric and provided with at least one inflection point
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, a second lens element with a negative refractive power, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power, a fifth lens element with a positive refractive power, and a sixth lens element with a negative refractive power. Such arrangements can provide a miniaturized six-piece optical lens system having a big stop and high image quality.