Dual-Axis Reflector Scanner Layout With Fewer Magnets and Less Crosstalk
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Solution Overview
Problem
Existing reflector scanners require multiple magnets and complex structures, leading to increased manufacturing costs and crosstalk issues.
Innovation Solution
A reflector scanner design using a frame with a mirror portion, first and second drive portions, and a reduced number of magnets, where the frame is turned by paired magnets and coils to oscillate in two axial directions while minimizing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If six magnets are used to prevent crosstalk by distributing them in specific locations, then crosstalk is suppressed, but the number of parts increases and manufacturing cost increases
Solution Approach 1:
The patent combines the functions of multiple magnets into a single magnet by strategically positioning the coil to generate magnetic fields that interact with the magnet at multiple locations. The coil is wound to create magnetic field lines that extend across the frame, allowing one magnet to serve the dual purpose of driving the frame while suppressing crosstalk effects that would otherwise require multiple separate magnets.
Solution Approach 2:
The single magnet in the patent performs multiple functions simultaneously: it serves as the driving element for frame rotation while also acting as a crosstalk suppression mechanism. The magnetic field generated by the coil interacts with this one magnet in a way that produces both the desired driving force and the suppressive effect on crosstalk, making the magnet a multi-functional component.
2Manufacturing precision
If six magnets are distributed throughout the structure to manage coil forces, then driving precision is maintained, but manufacturing cost increases
Solution Approach 1:
The patent merges the roles of multiple magnets into a single magnet by designing the coil's magnetic field distribution to achieve the same precision-control effect that would require multiple magnets. The coil is positioned and wound such that its magnetic field interacts with the single magnet to provide precise driving control without the need for multiple distributed magnets.
Solution Approach 2:
The patent extracts the essential function of magnetic interaction from a multi-magnet system and concentrates it into a single magnet配合a specifically designed coil. By taking out only the necessary magnetic interaction capability and implementing it through one magnet with a strategically positioned coil, the design achieves driving precision while eliminating the complexity and cost of multiple magnets.
3Device complexity
If the structure is simplified by reducing the number of magnets, then manufacturing cost decreases, but crosstalk suppression becomes more difficult
Solution Approach 1:
The patent introduces the coil as an intermediary element that mediates between the single magnet and the frame. The coil's magnetic field acts as a mediator to achieve both frame rotation and crosstalk suppression through its interaction with the magnet. This intermediary magnetic field allows one magnet to perform the dual function that would otherwise require multiple magnets.
Solution Approach 2:
The patent changes the parameters of the magnetic field interaction by strategically positioning the coil and adjusting its winding configuration. By modifying the magnetic field distribution parameters (field strength, direction, and spatial extent), the single magnet can generate the necessary driving force while simultaneously suppressing crosstalk effects through the controlled magnetic field interaction.
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 design reduces device size and manufacturing costs while effectively oscillating the mirror portion in two axial directions, suppressing crosstalk and simplifying the structure.
Implementation Method 1
a coil L1 and a magnet 31a, which generates a magnetic field in a direction crossing a direction of extension of the coil L1
Implementation Method 2
a first elastic member T1a, T1b stretching along a second axis J2
Data Source
AI summary
The present invention provides a reflector scanner including a frame, a mirror portion connected to inside of the frame via a first elastic member stretching along a second axis, a first and a second drive portions. The frame includes a frame-shaped portion and a set of bridge portions and is held turnably about a first axis. The first drive portion includes: first paired magnets disposed to be opposed to one another such that the first paired magnets interpose the frame on the first axis; a first coil wired in a first annular portion formed by one bridge portion and a portion of the frame-shaped portion at one side of the first paired magnets with respect to the one bridge portion, the one bridge portion being closer to one magnet of the first paired magnets than the mirror portion; and a second coil wired in a second annular portion formed by the other bridge portion and a portion of the frame-shaped portion at the other side of the first paired magnets with respect to the other bridge portion, the other bridge portion being closer to the other magnet of the first paired magnets than the mirror portion. The second drive portion includes: second paired magnets disposed to be opposed to one another such that the second paired magnets interpose a region between the set of bridge portions of the frame on the second axis; and a third coil wired at least in the region between the set of bridge portions of the frame-shaped portion.