Seven-Lens Optical Imaging Structure for Compact Camera Resolution
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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 ribs for precise alignment within a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses in the camera module is increased to achieve high resolution, then the resolution performance is improved, but the device size increases and becomes difficult to arrange in limited space
Solution Approach 1:
The patent implements a nested lens arrangement where lenses are positioned at different depths along the optical axis rather than simply arranged in a linear sequence. The first lens is located at a first position along the optical axis, and the second lens is located at a second position that is closer to the imaging plane than the first lens, creating a nested configuration that reduces the overall module volume while maintaining multiple lenses for high resolution
Solution Approach 2:
The patent transitions from a conventional linear arrangement of lenses to a three-dimensional configuration where lenses are positioned at different axial distances. By utilizing the depth dimension along the optical axis, the system can accommodate multiple lenses without proportionally increasing the lateral footprint, thus resolving the contradiction between resolution and device volume
2Volume of moving object
If multiple lenses are arranged in limited space to maintain miniaturization, then the device size is reduced, but aberration correction becomes difficult and resolution deteriorates
Solution Approach 1:
The patent applies different refractive powers and curvature characteristics to different lenses based on their specific positions in the optical system. The first lens has a first refractive power and the second lens has a second refractive power, with each lens optimized for its local position to correct specific aberrations. This localized optimization enables aberration correction in a compact arrangement
Solution Approach 2:
The patent optimizes specific parameters including the axial distance between lenses, the refractive powers of individual lenses, and the curvature of lens surfaces. By carefully controlling these parameters, the system achieves both miniaturization and effective aberration correction, allowing multiple lenses to be packed closely while maintaining image quality
3Measurement precision
If lenses are spaced apart along the optical axis to reduce aberrations, then optical performance is improved, but the total length of the system increases
Solution Approach 1:
The patent uses partial spacing between lenses rather than uniform large gaps. The first lens and second lens are positioned at specific axial distances that provide sufficient separation for aberration correction while avoiding excessive spacing that would increase system length. This partial action approach achieves optical performance without over-engineering the spacing
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 compact size by optimizing lens arrangements and using a self-alignment structure to minimize space while reducing aberrations and flare phenomena.
Implementation Method 1
an optical imaging system including 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.