Six-Element Lens Assembly for Compact, High-Quality Imaging
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Solution Overview
Problem
Conventional optical systems struggle to balance high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view, especially with the scaling down of pixel size in image sensors and increasing functionality requirements.
Innovation Solution
An imaging system lens assembly comprising six lens elements with specific refractive powers and surface shapes, including concave and convex surfaces with inflection points, to optimize optical performance and correct aberrations, while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size in image sensors is scaled down to improve resolution, then image quality is improved, but sensitivity deteriorates
Solution Approach 1:
The patent changes the refractive power parameters and surface curvature parameters of the six lens elements to optimize light gathering and focusing. By adjusting these parameters, the system maintains high image quality with scaled-down pixels while improving light sensitivity through enhanced optical path efficiency
Solution Approach 2:
The patent uses different materials for the six lens elements, with specific refractive indices and Abbe numbers selected for each element. This composite material approach allows optimization of both resolution and sensitivity by selecting materials with complementary optical properties
2Object-affected harmful factors
If the aperture size is increased to improve light gathering, then sensitivity is improved, but the device size increases
Solution Approach 1:
The patent optimizes the f-number parameter (Fno) and the axial distances between lens elements to achieve high sensitivity with a compact aperture design. By changing these parameters, the system maintains low sensitivity requirements while keeping the device miniaturized
3Adaptability or versatility
If the field of view is expanded to improve functionality, then adaptability is improved, but image quality deteriorates
Solution Approach 1:
The patent applies different surface shapes (convex, concave, inflection points) to different regions of the lens elements. The image-side surface of the sixth lens element has inflection points that locally adjust the optical path to correct aberrations across the expanded field of view, maintaining image quality while increasing adaptability
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 improved image quality, reduced sensitivity, balanced aperture size, and enhanced field of view, while being compact and cost-effective, with flexible material choices for glass or plastic.
Implementation Method 1
The first lens element has positive refractive power... Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side
Data Source
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AI summary
An imaging system lens assembly includes six lens elements (E1, E2, E3, E4, E5 and E6) which are, in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5) and a sixth lens element (E6). Each of the six lens elements (E1, E2, E3, E4, E5 and E6) has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element (E1) has positive refractive power. The image-side surface of the fifth lens element (E5) is convex in a paraxial region thereof. The image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof, and the image-side surface of the sixth lens element (E6) has at least one inflection point (P).