Folded Optical Module With Dual Actuation for Thin Long-Focal Imaging
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Solution Overview
Problem
Conventional optical systems in consumer electronic devices face challenges in maintaining device thickness while incorporating long focal length lenses, as they require additional components that increase thickness and complexity.
Innovation Solution
An optical system comprising a first optical member driving mechanism, a second optical member driving mechanism, and a fixing component, where the first driving mechanism includes a movable portion, elastic members, and a driving module to move the optical member along an optical axis, and the second mechanism rotates relative to a fixed portion, with a fixing component affixing these mechanisms to change light direction and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a long focal length lens is disposed in the electronic device, then the imaging capability is improved, but the thickness of the electronic device is increased
Solution Approach 1:
The patent introduces a reflecting member that changes the optical path direction by 90 degrees, allowing the optical system to achieve long focal length imaging capability while maintaining a compact thickness. The light path is folded from a linear arrangement to a perpendicular arrangement, effectively utilizing three-dimensional space to resolve the contradiction between imaging performance and device thickness.
2Measurement precision
If additional components are added to achieve long focal length, then the optical performance is improved, but the device complexity is increased
Solution Approach 1:
The patent integrates the reflecting member into the existing lens assembly structure, where the reflecting member is positioned within the lens module housing. This merging approach allows the optical system to achieve long focal length capability while minimizing additional structural complexity, as the reflecting member shares the same mounting space and structural support as the lens elements.
3Reliability
If elastic members and driving mechanisms are added for optical member control, then the focus and image stabilization are enhanced, but the magnetic interference is increased
Solution Approach 1:
The patent separates the electromagnetic driving module from the elastic member support structure for optical members. By positioning the electromagnetic driving module in a location distinct from where elastic members support optical members, the patent minimizes magnetic interference with the elastic members while maintaining effective focus and image stabilization control through the electromagnetic actuation of optical elements.
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 optical system achieves efficient light direction change and reduced device thickness by modularizing lens units and using elastic and electromagnetic driving mechanisms, enhancing focus and image stabilization while minimizing magnetic interference.
Implementation Method 1
a plurality of elastic members, each of the elastic members being elastically connected to the fixed portion and the movable portion
Implementation Method 2
The second optical member can change the moving direction of an external light from a first direction to a second direction
Data Source
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AI summary
An optical system is provided, including a first optical member driving mechanism, a second optical member driving mechanism, and a first fixing component. The first optical member driving mechanism includes a first fixed portion, a first movable portion, a plurality of elastic members, and a first driving module. Each of the elastic members is elastically connected to the first fixed portion and the first movable portion. The second optical member driving mechanism includes a second fixed portion, a second movable portion, and a second driving module. The second movable portion is movably connected to the second fixed portion. The second driving module can drive the second movable portion to rotate relative to the second fixed portion. The first fixing component affixes the first optical member driving mechanism to the second optical member driving mechanism.