Eight-Lens Optical Assembly for Compact Imaging Balance
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Solution Overview
Problem
Conventional optical lens assemblies face challenges in balancing image quality, sensitivity, aperture size, volume, and field of view, making it difficult to meet the diverse requirements of modern electronic devices.
Innovation Solution
A photographing system lens assembly comprising eight lens elements, carefully designed with specific refractive powers, surface shapes, and curvature radii to optimize image quality, sensitivity, and compactness, while maintaining a balance between these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional optical lens assembly is used, then image quality can be maintained, but it is hard to balance among image quality, sensitivity, aperture size, volume or field of view
Solution Approach 1:
The lens assembly is divided into eight separate lens elements with different refractive powers and surface shapes. Each lens element is optimized for specific functions: the first lens element has positive refractive power for light convergence, the second lens element has negative refractive power for aberration correction, and so on. This segmentation allows independent optimization of each element's parameters to achieve overall system balance.
Solution Approach 2:
Different regions of the lens assembly have different optical properties. The lens elements are arranged with specific curvature radii and thicknesses tailored to their local functions. For example, the fifth lens element has a specific curvature radius range to control spherical aberration, while the eighth lens element has a specific curvature radius range to control field curvature. This local optimization enables precise control over image quality, sensitivity, and other parameters.
2Volume of moving object
If the lens assembly volume is reduced for compactness, then space utilization efficiency improves, but maintaining high image quality becomes more difficult
Solution Approach 1:
The lens elements are arranged in a compact nested configuration where each lens element is positioned close to the others along the optical axis. The sum of axial distances between adjacent lens elements is minimized while maintaining proper optical spacing. This nested arrangement reduces the overall volume and total track length of the lens assembly while preserving image quality through precise optical design.
Solution Approach 2:
The lens elements use specific parameter ranges including curvature radii (R4, R12, R14, R16), focal lengths (f1-f8), and thicknesses (CT1-CT8) that are optimized for compactness. The aspheric coefficients and refractive indices are carefully selected to achieve high image quality within a reduced volume. These parameter optimizations enable the lens assembly to maintain excellent optical performance while minimizing the overall size.
3Quantity of substance
If the aperture size is increased for better light gathering ability, then sensitivity improves, but the volume and complexity of the lens assembly increases
Solution Approach 1:
The lens assembly uses aspheric surfaces with specific aspheric coefficients to dynamically control light paths. The aspheric shapes allow the lens elements to efficiently gather and focus light from larger apertures while maintaining a compact overall structure. The dynamic optimization of surface profiles enables better light gathering ability without proportionally increasing volume.
Solution Approach 2:
The lens assembly employs multiple lens elements with different refractive indices and optical properties combined to achieve high light gathering ability. The composite structure of eight different lens elements working together allows the system to capture more light while maintaining compact dimensions, as each element contributes differently to the overall light gathering and focusing function.
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 enhances light converging ability, reduces total track length, and increases space utilization efficiency, resulting in improved image quality and compactness suitable for various electronic devices.
Implementation Method 1
a first lens element with positive refractive power... a second lens element with negative refractive power... a third lens element with positive refractive power... a fourth lens element with negative refractive power... a fifth lens element with positive refractive power... a sixth lens element with positive refractive power... a seventh lens element with positive refractive power... a eighth lens element with negative refractive power
Data Source
AI summary
A photographing system lens assembly includes eight lens elements, the eight lens elements being, 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. Each of the eight lens elements has an object-side surface towards the object side and an image-side surface towards the image side.