Optical Imaging Lens Group Continuous Zoom Mechanism
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Solution Overview
Problem
Current mobile phone lenses rely on digital zoom, which reduces image quality and results in blurry photos due to the need to process and reframe images, lacking a continuous optical zoom function.
Innovation Solution
An optical imaging lens group comprising multiple lens groups with specific refractive powers and movements along the optical axis, allowing for continuous zoom from wide-angle to telephoto ends while maintaining image quality, achieved through the precise arrangement and movement of lens groups with fixed and movable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If digital zoom is used to achieve zoom function, then the device complexity is reduced, but the image quality deteriorates and becomes blurry
Solution Approach 1:
The optical imaging lens is divided into multiple lens groups (first lens group with negative refractive power, second lens group with positive refractive power, third lens group with negative refractive power) that can move independently along the optical axis. This segmentation allows each group to contribute differently to the zoom function, enabling continuous optical zoom while maintaining image quality through coordinated movement of these segmented components.
2Adaptability or versatility
If multiple lens groups with specific movements are implemented, then continuous optical zoom function is achieved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic zoom capability by allowing the first, second, and third lens groups to move along the optical axis during the zoom process. The movement distances and positions of these lens groups are dynamically adjusted to achieve continuous focal length variation from wide-angle to telephoto, transforming a static lens system into a dynamic one that adapts to different zoom requirements.
Solution Approach 2:
The optical imaging lens achieves multi-functionality by combining wide-angle and telephoto capabilities in a single lens system. The coordinated movement of multiple lens groups with different refractive powers enables the lens to cover a broad focal length range, making it universally applicable for both wide-angle and telephoto photography without requiring separate lens systems.
3Adaptability or versatility
If lens groups move along the optical axis for zoom, then zoom function is achieved, but the control precision requirement increases
Solution Approach 1:
The patent achieves precise zoom control by changing the positional parameters of multiple lens groups simultaneously. The first lens group moves a first distance, the second lens group moves a second distance, and the third lens group moves a third distance along the optical axis. By coordinating these parameter changes, the system achieves precise focal length adjustment across the zoom range while maintaining manageable control requirements through the distributed movement of multiple groups rather than a single group.
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
Enables continuous optical zoom without degrading image quality, providing a better photography experience by maintaining image clarity throughout the zoom process.
Implementation Method 1
a first lens group having a refractive power, in which an image side surface of a lens closest to an imaging side is concave; a second lens group having a refractive power; a third lens group having a refractive power; and a fourth lens group having a negative refractive power
Data Source
AI summary
Disclosed herein is an optical imaging lens group, including, in order from an object side to an image side along an optical axis: a first lens group having a refractive power, in which an image side surface of a lens closest to an imaging side is concave; a second and a third lens group having a refractive power; and a fourth lens group having a negative refractive power, in which an image side surface of a lens closest to the imaging side is concave and includes at least one inflection point, wherein the first lens group is a fixed group, and the second, third and fourth lens groups move on the optical axis to realize continuous zoom from a wide-angle end to a telephoto end; and an on-axis distance TTL and an effective focal length ft of the optical imaging lens group at the telephoto end satisfy: 0.8<TTL/ft<1.5.