Nested Seven-Lens Optical Imaging System for Compact Camera Modules
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Solution Overview
Problem
The challenge is to design an optical imaging system for mobile communications terminals that can achieve high resolution while minimizing the space required for multiple lenses, due to the terminal's miniaturization.
Innovation Solution
The optical imaging system consists of seven lenses sequentially disposed along an optical axis, with a spacer between the sixth and seventh lenses. This configuration satisfies specific ratios and conditions for lens diameters, focal lengths, and spacings to achieve aberration correction and high resolution within a limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lenses is increased to achieve high resolution, then the imaging performance is improved, but the space required for the camera module increases
Solution Approach 1:
The patent implements a nested lens configuration where the fourth lens is positioned within the third lens, and the fifth lens is positioned within the fourth lens. This nesting arrangement allows multiple lenses to occupy overlapping spatial regions, effectively reducing the overall camera module volume while maintaining the required number of lenses for high-resolution imaging
Solution Approach 2:
The patent transitions from a traditional linear arrangement of lenses along the optical axis to a multi-dimensional nested configuration. By utilizing radial and axial dimensions simultaneously, the lens elements are arranged in a compact three-dimensional space rather than a simple linear sequence, thereby reducing the overall module size while preserving imaging performance
2Reliability
If the number of lenses is increased to correct aberrations, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The nested lens structure provides inherent mechanical alignment and positioning for multiple lens elements. The inner lenses are supported by the outer lenses, creating a self-aligning system that reduces the complexity of mounting and alignment while maintaining the aberration correction capabilities of multiple lenses
Solution Approach 2:
Each lens element in the nested configuration serves multiple functions: optical imaging, aberration correction, and mechanical support for inner lenses. This multi-functionality reduces the overall system complexity by eliminating the need for separate support structures and alignment mechanisms
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 effectively corrects aberrations and achieves high resolution, even with multiple lenses in a compact space, enhancing the performance of camera modules in mobile communications terminals.
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 of the optical imaging system
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; and a spacer disposed between the sixth and seventh lenses, wherein the optical imaging system satisfies 0.5<S6d/f<1.4, where S6d is an inner diameter of the spacer, f is an overall focal length of the optical imaging system, and S6d and f are expressed in a same unit of measurement.