Reflectometer Actuator With Magnetic Return Positioning
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Solution Overview
Problem
Existing actuators for reflectometers lack positional recovery and driving precision due to the inability to restore the reflectometer to a preset default position after optical image stabilization, impairing response rate and immediacy.
Innovation Solution
An actuator configuration with facing magnetic poles and a pulling magnet to generate attractive force, ensuring tight contact and restoring force, allowing the reflectometer to return to a default position, enhancing driving precision and response rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a yoke is used to generate attraction between the moving body and fixed body, then adhesion is provided, but positional recovery capability is lost
Solution Approach 1:
The magnetic system is segmented into distinct functional components: the yoke provides adhesion force through attraction to the moving body, while separate facing magnetic poles on the fixed body and corresponding pulling magnets on the moving body provide positional recovery. This segmentation allows each component to fulfill its specific function without interfering with the other.
Solution Approach 2:
The patent merges two magnetic field generation systems into one integrated structure: the yoke-based attraction system and the facing pole-based recovery system coexist within the same actuator assembly, with the facing magnetic poles positioned to simultaneously provide both adhesion and restoring force to the moving body.
2Ease of operation
If rotational movement is used for OIS, then the reflectometer can compensate for camera shake, but the reflectometer remains at a random position after operation, impairing response rate
Solution Approach 1:
The facing magnetic poles and pulling magnets are pre-configured to create a restoring force that automatically returns the reflectometer to its default position after OIS operation. This preliminary setup of magnetic attraction ensures that no additional locating process is needed, as the restoring force continuously guides the reflectometer back to the correct position.
3Device complexity
If no restoring force is provided, then the structure remains simple, but driving precision is impaired due to lack of positional recovery
Solution Approach 1:
The actuator system is self-correcting through the facing magnetic poles and pulling magnets, which automatically generate the restoring force needed to return the moving body to its default position. This self-service mechanism eliminates the need for external locating processes or complex control systems, maintaining structural simplicity while ensuring precise positioning.
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 actuator provides improved driving precision and response rate by using magnetic poles to maintain contact and restore the reflectometer to a default position, optimizing optical image stabilization through rotation.
Implementation Method 1
generate an electromagnetic force between the coil and the magnet so that the mover moves
Implementation Method 2
yoke made of magnetic material that generates attraction towards magnets
Implementation Method 3
configuration pairing facing magnetic poles to confront counterpart magnetic poles
Data Source
AI summary
The embodiment disclosed herein is an actuator for reflectometer, the actuator comprising: a carrier attached with a reflectometer and equipped with a first magnet; a middle guide to support the rotation of the carrier about a first direction; at least one first ball positioned between the carrier and the middle guide; a second magnet equipped to the middle guide; a pulling magnet equipped to the carrier and facing a first side of the second magnet; and a first coil to impart a driving force to the first magnet. A magnetic pole boundary of the pulling magnet faces a magnetic pole boundary of the second magnet, and a N and S poles of the pulling magnet are arranged to be opposite to the N and S poles of the first side of the second magnet.