Movable Lens Groups for Compact Zoom Imaging
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Solution Overview
Problem
Portable electronic devices with camera modules face challenges in achieving high optical properties due to the limitations of single focal length imaging lens systems, which are typically compact but struggle with optical performance.
Innovation Solution
An imaging lens system comprising six lenses with specific refractive powers and movable lens groups, allowing for adjustable focal length and optical axis movement to accommodate various imaging modes, including far-distance, near-distance, and intermediate modes, while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single focal length imaging lens system is used, then the camera module can be made compact, but high optical properties cannot be achieved
Solution Approach 1:
The patent applies the dynamics principle by making lens groups movable along the optical axis. Specifically, the second lens group and third lens group can move relative to each other to adjust the focal length, enabling the system to switch between different imaging modes (wide-angle, telephoto, macro) while maintaining a compact overall structure. This dynamic adjustment capability resolves the contradiction between compact size and high optical performance.
Solution Approach 2:
The patent implements parameter changes by varying the focal length of the imaging lens system through movement of lens groups. The system can change between a first focal length (wide-angle mode), second focal length (telephoto mode), and third focal length (macro mode). This ability to change optical parameters allows the compact camera module to achieve high optical properties across multiple imaging scenarios.
2Reliability
If multiple focal lengths are implemented, then high optical properties can be achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the imaging lens system into four distinct lens groups (first, second, third, and fourth lens groups). The second and third lens groups are configured as movable groups that can adjust their positions relative to each other. This segmentation allows independent control of different optical functions, achieving multiple focal lengths while managing system complexity through modular design.
Solution Approach 2:
The patent implements multi-functionality by designing a single imaging lens system that can perform multiple imaging functions (wide-angle photography, telephoto photography, and macro photography) through the movement of lens groups. The same physical lens system achieves variable focal lengths by changing the relative positions of lens groups, eliminating the need for separate lens modules for each function and thereby reducing overall device complexity.
3Adaptability or versatility
If lens groups are made movable for autofocus and zoom, then imaging flexibility is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies dynamics by configuring the second and third lens groups as movable components that can adjust their positions along the optical axis. The second lens group moves to adjust focus, while the third lens group moves to change focal length. This dynamic design provides imaging flexibility for autofocus and zoom functions. The patent manages manufacturing precision requirements by defining specific movement ranges and positional relationships between lens groups that can be controlled through standard actuation 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 enables high optical performance across different imaging modes by adjusting focal length and aperture, enhancing autofocusing and zoom capabilities within a small camera module format.
Implementation Method 1
a first lens having a negative refractive power; a second lens having a refractive power; a third lens having a refractive power; a fourth lens having a refractive power; a fifth lens having a refractive power
Data Source
AI summary
An imaging lens system includes a first lens having a negative refractive power, a second lens having a refractive power, a third lens having a refractive power, a fourth lens having a refractive power, a fifth lens having a refractive power, and a sixth lens having a convex object-side surface is convex in a paraxial region thereof and a concave image-side surface in a paraxial region thereof. The first to sixth lenses are sequentially disposed in ascending numerical order along an optical axis of the imaging lens system from an object side of the imaging lens system toward an image plane of the imaging lens system, and one or more of the first to fifth lenses is configured to be movable in a direction of the optical axis.