1D MEM Scanning Mirror for 3D Position Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current position determination methods using optical metrology, such as those in radiotherapeutic applications, require expensive two-dimensional MEM devices and complex circuitry, limiting accuracy and cost-effectiveness for real-time three-dimensional tracking of objects.
Innovation Solution
A system employing first and second target elements with a known separation distance, a scanning light source, and processing means to determine object position based on angles and reflected light points, utilizing a one-dimensional scanning path and optional reference reflectors or photodetectors to achieve accurate three-dimensional position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two-dimensional MEM scanning mirrors are used for 3D tracking, then position determination accuracy is improved, but device cost and complexity increase
Solution Approach 1:
The patent uses a one-dimensional scanning mirror to scan light along a single axis, but by measuring the time of flight and using the known separation distance between two target elements, the system calculates three-dimensional position information. This converts a spatial complexity problem into a temporal measurement problem, achieving 3D tracking capability with a simpler 1D scanning device
Solution Approach 2:
The patent replaces the mechanical complexity of two-dimensional scanning mirrors with a combination of one-dimensional scanning plus temporal measurement. By substituting mechanical 2D scanning with 1D scanning plus time-of-flight calculation, the system achieves equivalent or superior position determination capability with reduced device complexity
2Measurement precision
If two-dimensional MEM scanning mirrors are used for 3D tracking, then position determination accuracy is improved, but device cost increases
Solution Approach 1:
The patent employs inexpensive one-dimensional MEM scanning mirrors instead of costly two-dimensional devices. By using multiple simple, low-cost 1D mirrors with sequential scanning, the system achieves 3D tracking capability at a fraction of the cost of a single 2D mirror, making the system more manufacturable and economically viable
3Adaptability or versatility
If two-dimensional MEM scanning mirrors are used for 3D tracking, then tracking capability is improved, but additional circuitry and control complexity increase
Solution Approach 1:
The patent breaks down the complex function of a single 2D scanning mirror into multiple simpler 1D scanning mirrors that operate sequentially. Each 1D mirror handles scanning along one axis, and by coordinating multiple simple scanning operations with temporal measurements, the system achieves full 3D tracking capability with reduced individual component complexity and simpler control circuitry for each mirror
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
This approach simplifies the system by using one-dimensional MEM devices, reducing costs and complexity, enabling faster and more accurate three-dimensional position tracking with higher refresh rates compared to prior art methods.
Implementation Method 1
detection means for light reflected from, or received by, the first and second target elements
Data Source
AI summary
An apparatus for position-detection of an object within a region is disclosed. The apparatus includes first and second target elements mounted on an object and having a known separation distance between the two. A scanning light source is configured to issue a beam of light along a substantially one-dimensional scanning path, which illuminates a point that moves over the first and second target elements. A detector is provided for detecting light reflected from, or received by, the first and second target elements. A processing system is configured to determine the position of the object within the region based on first and second points in the scanning path at which the detector detects light returned from, or received by, the first and second target elements and the known separation distance between the two reflective elements.