Nine-Lens Optical Assembly for Miniaturization and Aberration Control
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Solution Overview
Problem
Current lens assemblies fail to meet the requirements of miniaturization, large F-number, and high resolution, necessitating a new structural design to enhance optical performance.
Innovation Solution
A lens assembly comprising specific lenses with varying refractive powers and surface curvatures, including biconvex, concave, and meniscus lenses, arranged along an optical axis to satisfy conditions that optimize refractive power, field of view, and aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lens assembly is miniaturized, then the total lens length is shortened, but the resolution and optical performance deteriorate
Solution Approach 1:
The lens assembly is divided into multiple lens elements (first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, and ninth lens) with different refractive powers and surface curvatures. Each lens element is optimized to perform specific optical functions, allowing the system to achieve high resolution while maintaining a compact total length through functional segmentation of the optical path.
Solution Approach 2:
The patent employs lenses with varying refractive powers, surface curvatures, and material properties to optimize the optical path. By carefully selecting and adjusting these parameters across the nine lens elements, the system achieves both miniaturization and high resolution, resolving the contradiction between compact size and optical performance.
2Illumination intensity
If the F-number is increased, then the light gathering capability is improved, but the resolution and optical performance deteriorate
Solution Approach 1:
The optical system is segmented into multiple lens elements with different refractive powers. This segmentation allows the system to manage light paths more effectively, achieving both large F-number (for improved light gathering) and high resolution by distributing optical functions across multiple elements rather than relying on a single lens.
Solution Approach 2:
The lens assembly uses composite optical design combining lenses with different refractive indices and surface curvatures. This composite approach enables the system to simultaneously achieve large F-number and high resolution by optimizing the combined optical path through careful selection of lens materials and configurations.
3Power
If the refractive power is increased, then the focusing capability is improved, but the aberration and optical performance deteriorate
Solution Approach 1:
The total refractive power is distributed across multiple lens elements with different individual refractive powers. This segmentation allows the system to achieve the required focusing capability while minimizing aberrations by distributing the optical burden across multiple elements, each contributing to the overall focusing function with optimized individual characteristics.
Solution Approach 2:
Each lens element is designed with specific local optical characteristics optimized for its position in the sequence. The first lens has positive refractive power for initial focusing, while subsequent lenses have varying powers to correct aberrations and optimize the overall optical path, achieving high focusing capability with minimal aberration through localized optimization.
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 design achieves increased resolution, effective aberration correction, and improved chromatic aberration control, meeting the demands of miniaturization and high optical performance.
Implementation Method 1
The first lens is a biconvex lens with positive refractive power... The second lens is with negative refractive power... The third lens is a biconvex with positive refractive power...
Data Source
AI summary
A lens assembly includes a first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses. The first lens is a biconvex lens with positive refractive power. The second lens is with negative refractive power and includes a concave surface facing the object side. The third lens is a biconvex with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The fifth lens is a biconcave lens with negative refractive power. The fourth, sixth, and ninth lenses are with positive refractive power. The seventh lens is with positive refractive power. The eighth lens is with negative refractive power. The first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses are arranged in order from the object side to the image side along an optical axis.