Seven-Lens Optical System Aberration Control
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, desirable aperture size, miniaturization, and field of view, making it difficult to meet the increasing functionality requirements of electronic devices.
Innovation Solution
A photographing optical system comprising seven lens elements with specific refractive powers and surface shapes, including aspheric surfaces with inflection points and critical points, is designed to optimize image quality and size, featuring a configuration that satisfies conditions such as |R1|/f < 35.0 and 1.00 < ΣAT/T12 < 8.20, which allows for a wide field of view and reduced volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve image quality, then image quality is improved, but device size and complexity increase
Solution Approach 1:
The optical system divides the imaging function into seven distinct lens elements with different refractive powers and surface characteristics. Each lens element is optimized for specific aberration correction, allowing the system to achieve high image quality while maintaining a compact form factor through functional segmentation rather than using fewer, larger elements
Solution Approach 2:
Different lens elements are assigned specific local functions: the first lens element with positive refractive power for light gathering, the third and sixth elements with negative refractive power for aberration correction, and aspheric surfaces on specific elements for distortion control. This localized optimization allows each component to contribute efficiently to overall image quality without increasing total system size
2Adaptability or versatility
If the field of view is increased to enhance functionality, then functionality is improved, but optical system size and complexity increase
Solution Approach 1:
The optical system employs aspheric surfaces with inflection points that dynamically adjust light ray paths across different field angles. The aspheric coefficients are specifically designed to handle wide field of view requirements while maintaining aberration control, allowing the system to achieve enhanced functionality without proportionally increasing complexity
Solution Approach 2:
The system utilizes specific parameter relationships (|R1|/f < 35.0, 1.00 < ΣAT/T12 < 8.20, |f3/f1| < 0.70) to optimize the balance between field of view and complexity. By carefully controlling curvature radii, axial distances, and focal length ratios, the system achieves wide field of view while keeping the number of elements and overall complexity manageable
3Volume of stationary object
If lens elements are miniaturized to reduce device size, then device size is reduced, but image quality and aberration control deteriorate
Solution Approach 1:
The system employs aspheric surfaces on multiple lens elements, particularly the first, third, and sixth elements, which have inflection points that allow for advanced aberration control. These curved surface designs enable effective light ray management in miniaturized configurations, maintaining image quality despite reduced element sizes
Solution Approach 2:
The optical system uses lens elements with different refractive indices and Abbe numbers (e.g., V3 between 10.0 and 50.0, V6 between 10.0 and 30.0) to achieve chromatic aberration correction in a compact format. This composite approach allows miniaturization while maintaining color fidelity and image quality through material diversity rather than size
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 optical system achieves improved image quality, reduced size, and a balance between miniaturization and field of view, enhancing the capabilities of electronic devices with advanced imaging capabilities.
Implementation Method 1
a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements has an object-side surface facing toward an object side and an image-side surface facing toward an image side
Data Source
AI summary
A photographing optical system includes seven 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 fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. Each of the seven lens elements of the photographing optical system has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the second lens element is convex in a paraxial region thereof. The third lens element has negative refractive power. At least one lens element of the photographing optical system has at least one aspheric surface having at least one inflection point.