Compact Zoom Lens Assembly for Aberration Control
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Solution Overview
Problem
The challenge of aberration control becomes difficult due to the miniaturization of lens assemblies in electronic devices, which affects the quality of captured images.
Innovation Solution
A compact lens assembly is designed with a specific arrangement of lens groups, including a first lens group with negative refractive power, a second lens group with positive refractive power, and a third lens group with negative refractive power, where the second and third lens groups move during zooming, and the third lens group performs focusing, adhering to certain focal length ratios and aberration correction inequalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens assembly is miniaturized to reduce device size, then the compactness is improved, but the aberration control becomes difficult and image quality deteriorates
Solution Approach 1:
The lens assembly is divided into multiple lens groups (first lens group with negative refractive power, second lens group with positive refractive power, and third lens group with negative refractive power). Each lens group is responsible for specific optical functions, allowing independent optimization of aberration control while maintaining compact overall size. This segmentation enables complex optical corrections to be distributed across multiple smaller components rather than requiring a single large lens element.
Solution Approach 2:
Different lens groups are assigned different refractive power characteristics (negative, positive, negative) to address specific aberration types at different locations within the optical path. The third lens group specifically performs focusing function while the second lens group handles zooming, allowing localized optimization of optical quality in each region of the compact lens assembly.
2Manufacturing precision
If multiple optical apparatuses are mounted to improve image quality and visual effects, then the imaging performance is improved, but the device complexity and size increase
Solution Approach 1:
The lens assembly is designed to perform multiple optical functions (zooming, focusing, aberration correction) within a single integrated structure. The second lens group handles zooming operations while the third lens group performs focusing, eliminating the need for separate zoom and focus mechanisms. This multi-functionality reduces device complexity while maintaining high imaging performance.
Solution Approach 2:
Multiple lens groups with different optical characteristics are merged into a single compact assembly rather than using separate optical apparatuses. The combination of negative and positive refractive power lens groups creates a unified optical system that achieves complex imaging functions without requiring multiple independent camera modules, thereby reducing overall device complexity.
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 miniaturization while maintaining high image quality, enabling effective aberration correction and image stabilization, facilitating high-performance image capture in compact electronic devices.
Implementation Method 1
a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power
Data Source
AI summary
A lens assembly and an electronic apparatus having the lens assembly are disclosed. The disclosed lens assembly includes a plurality of lenses arranged from an object side to an image side, the image side being where an image sensor is located, and includes a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having negative refractive power. During zooming, the second lens group and the third lens group move to the object side, and the third lens group performs focusing. In addition, various other embodiments are possible.