Six-element Lens Assembly Aberration Correction
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Solution Overview
Problem
Conventional photographing optical lens assemblies face challenges in balancing image quality, sensitivity, aperture size, volume, and field of view, making it difficult to meet diverse requirements in electronic devices with advanced semiconductor technologies.
Innovation Solution
A compact photographing optical lens assembly comprising six lens elements with specific refractive powers and surface curvatures, including a first lens element with negative refractive power and a sixth lens element with a concave image-side surface, is designed to satisfy these requirements, optimizing curvature radii, Abbe numbers, and refractive indices to correct aberrations and enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional photographing optical lens assemblies are used, then manufacturing and assembly are simpler, but image quality, sensitivity, aperture size, volume, and field of view cannot be balanced effectively
Solution Approach 1:
The optical lens assembly is divided into six distinct lens elements, each with specific refractive powers and surface curvature characteristics. This segmentation allows independent optimization of each element to correct different types of aberrations while collectively achieving the desired balance between image quality, aperture size, and field of view.
Solution Approach 2:
Different lens elements are assigned specific local properties: the first lens element has negative refractive power with a concave object-side surface, the sixth lens element has a concave image-side surface with a convex shape in the off-axis region. These localized quality variations enable precise correction of aberrations in different regions of the optical field.
2Manufacturing precision
If lens elements with specific curvature radii and Abbe numbers are used, then aberrations are corrected and image quality improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for curvature radii (R1, R2) and Abbe numbers (V2, V4, V6) of different lens elements. By defining these parameters within specific ranges rather than fixed values, the design achieves aberration correction while allowing manufacturing tolerances. The conditional expressions provide flexibility in parameter selection to balance optical performance with manufacturability.
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 solution achieves a compact size while maintaining high image quality, correcting aberrations, and providing a large field of view, suitable for diverse applications in electronic devices.
Implementation Method 1
The first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof
Implementation Method 2
The sixth lens element has an image-side surface being concave in a paraxial region thereof and the image-side surface includes at least one convex shape in an off-axis region thereof
Data Source
AI summary
A photographing optical lens assembly includes six lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fifth lens element and a sixth lens element. The first lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof and includes at least one convex shape in an off-axis region thereof.