Nested Seven-Lens Optical Imaging Structure for Compact Camera Modules
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Solution Overview
Problem
The challenge of arranging multiple lenses in a camera module of a mobile communications terminal while maintaining high resolution and miniaturization is difficult due to limited space.
Innovation Solution
An optical imaging system with specific lens configurations and spacings, including seven lenses with defined weight and curvature ratios, and a self-alignment structure using lens barrels and spacers to maintain alignment and minimize space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then image quality is improved, but the space required in the camera module increases
Solution Approach 1:
The patent implements a nested lens structure where the second lens is positioned inside the first lens, the third lens inside the second lens, and so on. This nesting arrangement allows multiple lenses to be arranged in a compact configuration, achieving high resolution with increased lens count while minimizing the overall camera module volume.
2Volume of moving object
If multiple lenses are arranged in limited space, then miniaturization is achieved, but aberration correction becomes difficult
Solution Approach 1:
The patent assigns different refractive powers and surface curvatures to specific lenses based on their positions in the nested structure. Each lens is optimized with specific properties (positive or negative refractive power, convex or concave surfaces) to correct particular types of aberrations, ensuring effective aberration correction despite the compact nested arrangement.
3Measurement precision
If lenses are spaced apart to reduce aberrations, then image quality is improved, but the total length of the optical system increases
Solution Approach 1:
The nested lens configuration allows lenses to be positioned closely together along the optical axis while maintaining necessary spacing for aberration correction. The concentric arrangement enables effective use of limited axial space, achieving aberration correction without significantly increasing the total optical system length.
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 system achieves high resolution and reduces aberrations, enabling effective image capture in a compact form factor.
Implementation Method 1
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis
Data Source
AI summary
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially disposed in numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, wherein the first to seventh lenses are spaced apart from each other along the optical axis, and the optical imaging system satisfies 0.1<L1w/L7w<0.4, where L1w is a weight of the first lens, L7w is a weight of the seventh lens, and L1w and L7w are expressed in a same unit of measurement.