Periscope Zoom Lens Electromagnetic Layout for Compact Focal Change
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Solution Overview
Problem
Current periscope lenses are primarily fixed-focal due to size constraints, making it challenging to achieve both zoom functionality and miniaturization in portable electronic devices.
Innovation Solution
A compact zoom lens design incorporating a mount, guide unit, multiple lens groups, and a driving device with magnets and coils, allowing for precise movement of movable lens groups along a guide unit to achieve zoom functionality without increasing the lens volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a periscope lens is designed as a fixed-focal lens, then the lens volume can be minimized, but zoom functionality is lost
Solution Approach 1:
The patent implements a movable lens group that can be dynamically positioned along the optical axis to achieve different focal lengths. The lens group moves between a first position for wide-angle shooting and a second position for telephoto shooting, transforming the static fixed-focal lens into a dynamic zoom lens while maintaining compact dimensions
Solution Approach 2:
The patent replaces traditional mechanical zoom mechanisms with an electromagnetic driving system. Magnets are fixed to the movable lens group while coils are fixed to the mount, creating an electromagnetic actuation system that drives the lens group movement without complex mechanical linkages, thereby reducing overall lens volume
2Adaptability or versatility
If a zoom lens is designed to provide zoom functionality, then adaptability is improved, but lens volume increases
Solution Approach 1:
The patent arranges the magnets and coils in the first direction (along the optical axis) rather than using traditional radial or lateral arrangements. This dimensional optimization allows the electromagnetic driving components to be integrated within the compact lens structure without increasing the lateral dimensions, enabling zoom functionality in a miniaturized form factor
Solution Approach 2:
The patent integrates the driving device components (magnets and coils) directly into the lens structure. The magnets are fixed to the movable lens group and the coils are fixed to the mount, merging the actuation system with the optical components themselves rather than adding separate mechanical zoom mechanisms, thereby minimizing volume
3Volume of moving object
If magnets and coils are arranged in the first direction, then the lens volume is minimized, but driving force may be reduced
Solution Approach 1:
The patent optimizes the arrangement parameters of the magnets and coils along the first direction to achieve the right balance between compactness and driving force. By carefully positioning the magnets on the movable lens group and the coils on the mount along the optical axis, the electromagnetic force is maximized within the constrained volume, providing sufficient driving force for lens group movement
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 zoom lens effectively changes focal length while providing stable and smooth zoom or focus operations, operating quietly without noise, and maintaining a compact volume, thus meeting the requirements of both zoom functionality and miniaturization.
Implementation Method 1
The driving device includes magnets and coils. The magnets are fixed to one of the movable lens group and the mount, while the coils are fixed to the other of the movable lens group and the mount.
Implementation Method 2
The guide unit includes a guide rod, a guide ball, a rolling ball, a resilient element or a guide rail, for guiding the movable lens group to move along the guide unit in a first direction.
Data Source
AI summary
An image capture apparatus and a zoom lens are provided. The zoom lens in accordance with an exemplary embodiment of the invention includes a mount, a guide unit, a plurality of lens groups and a driving device. The guide unit is disposed in the mount in a first direction. The lens groups are disposed in the mount and include at least one movable lens group which can be moved along the guide unit. The driving device is configured for driving the movable lens group. The driving device includes magnets and coils. The magnets are fixed to one of the movable lens group and the mount, while the coils are fixed to the other of the movable lens group and the mount. The magnets and/or the coils are arranged in the first direction.