Six-Lens Camera Module for Compact Smartphone Imaging
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Solution Overview
Problem
The challenge is to design a camera lens group for smartphones with a large screen-to-body ratio that achieves high imaging quality while maintaining a compact size and aesthetic appeal.
Innovation Solution
The camera lens group consists of six lenses, each with specific refractive powers and surface types, arranged along an optical axis. The lenses are optimized with parameters such as focal lengths, radii of curvature, and thicknesses to ensure miniaturization, high pixel density, and good imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the camera lens group is miniaturized to increase screen-to-body ratio, then the aesthetic appeal and screen-to-body ratio are improved, but the imaging quality deteriorates
Solution Approach 1:
The lens group is divided into six individual lens elements with specific refractive powers and surface curvatures, allowing each element to contribute differently to the overall optical performance. This segmentation enables compact design while maintaining imaging quality through optimized light path control at each interface
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements (first, third, fourth, fifth, and sixth lenses) to replace traditional spherical surfaces. This curvature optimization enables better aberration control in a compact form factor, maintaining high imaging quality while reducing the overall lens group size
2Manufacturing precision
If more lens elements are added to improve imaging quality, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The patent optimizes specific parameters of six lens elements including refractive powers (positive and negative), surface curvatures (convex and concave), and thickness ratios. By carefully controlling these parameters within specific ranges, high imaging quality is achieved without unnecessarily increasing the number of elements or structural complexity
Solution Approach 2:
The six-lens configuration with mixed refractive powers serves multiple functions simultaneously: correcting various optical aberrations, controlling the light path, and achieving a compact form factor. This multi-functional design avoids the need for additional specialized elements that would increase 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 optimized lens configuration achieves a compact size, high imaging quality, and a large field-of-view, enhancing the visual experience and screen-to-body ratio of smartphones.
Implementation Method 1
a first lens having a positive refractive power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface
Implementation Method 2
At least one of the surfaces from the object-side surface of the first lens to the image-side surface of the sixth lens is an aspheric surface
Data Source
AI summary
Embodiments of the present disclosure disclose a camera lens group, comprising, sequentially along an optical axis from an object side to an image side: a stop; a first lens having a positive refractive power; a second lens having a refractive power; a third lens having a negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power. A distance TTL on the optical axis from the object-side surface of the first lens to an image plane of the camera lens group and half of a diagonal length ImgH of an effective pixel area on the image plane of the camera lens group satisfy: TTL/ImgH≤1.25. At least one of the surfaces from the object-side surface of the first lens to the image-side surface of the sixth lens is an aspheric surface.