Eight-Element Photographing Lens Assembly with Inflection Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance among high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to the rapid advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
A photographing lens assembly comprising eight lens elements, with specific refractive powers and surface configurations, including convex and concave surfaces with inflection points and critical points, to optimize image quality and compactness, while correcting aberrations and ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens elements is increased to improve image quality and correct aberrations, then image quality improves, but device complexity and size increase
Solution Approach 1:
The lens assembly is divided into eight distinct lens elements with specific positive and negative refractive powers, arranged in a predetermined sequence from object side to image side. This segmentation allows each element to contribute to correcting specific aberrations while maintaining overall image quality
Solution Approach 2:
Different lens elements are assigned specific local properties: the first lens element has a convex object-side surface, the eighth lens element has a concave object-side surface, and at least one lens surface contains inflection points. These localized quality variations enable precise aberration correction without requiring uniform complexity across all elements
2Volume of moving object
If the lens assembly is miniaturized to reduce device size, then compactness improves, but image quality and aberration correction capability deteriorate
Solution Approach 1:
The lens elements utilize curved surfaces with specific geometric properties, including inflection points on at least one lens surface. This curvature design enables effective aberration correction within a compact form factor, as the curved surfaces can focus and redirect light rays more efficiently than flat surfaces would in a smaller assembly
3Adaptability or versatility
If the field of view is expanded to improve functionality, then versatility improves, but aberration and ghosting increase
Solution Approach 1:
The lens assembly includes at least one lens surface with inflection points that specifically address and convert the harmful effects of aberration and ghosting into beneficial image quality. The inflection points create localized surface geometry that redirects stray light and corrects wavefront errors, transforming potential image defects into corrected imagery across the expanded field of view
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 lens assembly achieves high image quality, compact size, and effective aberration correction, supporting multi-functional electronic devices with improved peripheral image resolution and space utilization.
Implementation Method 1
a first lens element (110) with positive refractive power, a second lens element (120) with negative refractive power, a third lens element (130) with positive refractive power, a fourth lens element (140) with negative refractive power, a fifth lens element (150) with positive refractive power, a sixth lens element (160) with negative refractive power, a seventh lens element (170) with positive refractive power, and an eighth lens element (180) with negative refractive power
Data Source
AI summary
A photographing lens assembly includes a total of eight 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, a seventh lens element and an eighth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The eighth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. At least one lens element of the photographing lens assembly has at least one lens surface having at least one inflection point.