Six-Lens Optical Imaging System for Wide-Angle Mobile Camera
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Solution Overview
Problem
Mobile communications terminals are facing challenges in achieving high-resolution and high-performance camera modules due to size and weight constraints, particularly in obtaining an optical zoom effect and capturing subjects at various distances.
Innovation Solution
The optical imaging system comprises a sequence of six lenses, including a first lens with negative refractive power and a concave image side surface, designed to provide an angle of view of 100° or more. This system is optimized with specific focal length ratios, Abbe number differences, and material choices to achieve a wide angle of view and bright imaging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera modules are designed for high resolution and high performance, then image quality is improved, but device size and weight increase
Solution Approach 1:
The patent applies parameter changes by optimizing the refractive indices and Abbe numbers of lens materials. Specifically, it sets the Abbe number of the first lens between 20-40 and the second lens between 50-70, creating significant dispersion differences that enable compact lens design with reduced overall size while maintaining high image quality through precise chromatic aberration control
Solution Approach 2:
The patent uses composite material principles by combining lenses with different optical properties - specifically pairing a first lens made of material with low Abbe number (high dispersion) and a second lens made of material with high Abbe number (low dispersion). This composite approach allows the system to achieve both compact size and high resolution by balancing chromatic aberrations across the lens assembly
2Measurement precision
If camera modules are designed for high resolution and high performance, then image quality is improved, but device size increases
Solution Approach 1:
The patent changes optical parameters by setting the focal length of the first lens between 0.8-1.5mm and the second lens between 1.5-2.5mm, with the ratio f1/f2 between 0.4-0.6. These parameter optimizations enable a compact total track length while achieving high resolution through precise focal length matching and chromatic aberration control
Solution Approach 2:
The patent applies local quality by giving each lens specific optical characteristics tailored to its position in the system. The first lens is designed with negative refractive power and low Abbe number to handle wide-angle light rays, while the second lens has positive refractive power and high Abbe number to correct chromatic aberrations, creating a compact yet high-performance local optimization in each lens element
3Adaptability or versatility
If optical zoom functionality is added to capture subjects at various distances, then versatility is improved, but device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by designing a single fixed-focus lens assembly that can capture subjects at various distances through its wide 100° or more angle of view. The specific configuration with six lens elements and controlled focal lengths enables the system to function as both a wide-angle lens and provide pseudo-zoom capability through digital processing, eliminating the need for complex mechanical zoom mechanisms
Solution Approach 2:
The patent replaces mechanical zoom mechanisms with an optical design that achieves similar functionality through lens element arrangement and focal length optimization. By using a fixed lens assembly with specific focal length ratios and a wide angle of view, the system eliminates moving parts associated with traditional zoom mechanisms while still capturing subjects at various distances through computational photography techniques
4Area of moving object
If wide angle of view is achieved, then field of view is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes geometric parameters by setting the angle of view to 100° or more while controlling the focal lengths of individual lenses (f1 between 0.8-1.5mm, f2 between 1.5-2.5mm). These parameter specifications provide clear manufacturing targets that balance wide field of view with achievable precision tolerances, ensuring that the wide angle design can be manufactured with standard precision capabilities
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 proposed optical imaging system effectively captures images with a wide angle of view and high brightness, enabling zoom functionality and clear image capture at various distances, even in low-light environments.
Implementation Method 1
the first lens has negative refractive power, an image side surface thereof is concave
Implementation Method 2
an optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens sequentially disposed from an object side
Data Source
AI summary
An optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, sequentially disposed from an object side. The first lens has negative refractive power, an image side surface thereof is concave, and an angle of view of the optical system including the first lens to the sixth lens is 100° or more. When a focal length of the first lens is f1_1, and a total focal length of the optical system including the first lens to the sixth lens is F1, 1.0<|f1_1/F1|<2.0 is satisfied.