MEMS Mirror Emission Direction Alignment for Electromagnetic Wave Detection
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Solution Overview
Problem
Existing electromagnetic wave detection systems face challenges in accurately aligning the emission direction of electromagnetic waves with the estimated direction, leading to discrepancies in detection and data accuracy.
Innovation Solution
The electromagnetic wave detection apparatus incorporates a propagation direction modifier with a MEMS mirror and a controller that switches pixels between reflecting and transmitting states to adjust the emission direction, ensuring accurate alignment and detection of reflected waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a propagation direction modifier with MEMS mirror is introduced to adjust emission direction, then the alignment accuracy between estimated and actual emission directions is improved, but the device complexity increases
Solution Approach 1:
A propagation direction modifier comprising a MEMS mirror is introduced as an intermediary component between the light source and the scanning system. This mediator adjusts the emission direction of light beams by reflecting them at controlled angles, enabling precise alignment between estimated and actual emission directions without fundamentally redesigning the entire detection system.
Solution Approach 2:
The MEMS mirror is driven by a drive signal whose amplitude varies according to elapsed time, creating dynamic adjustment of the emission direction. The controller modifies the drive signal characteristics in real-time to compensate for directional discrepancies, transforming a static optical path into a dynamically adjustable system that adapts to timing and directional requirements.
2Measurement precision
If pixels are switched between reflecting and transmitting states to optimize detection timing, then the detection accuracy of reflected waves is improved, but the device complexity increases
Solution Approach 1:
Pixels in the propagation unit are switched between reflecting and transmitting states in a periodic manner synchronized with the emission and detection cycles. This periodic switching allows the system to optimize detection timing by ensuring that pixels are in the appropriate state (reflecting or transmitting) at the correct moments in the electromagnetic wave cycle, thereby improving reflected wave detection accuracy.
Solution Approach 2:
The propagation unit is divided into multiple independently controllable pixels that can be switched between different states. This segmentation allows selective control of individual pixels or groups of pixels, enabling precise timing optimization for reflected wave detection without requiring complex control of the entire system at once.
3Measurement precision
If the emission direction is adjusted to align with estimated direction, then the distance and image information accuracy is improved, but the loss of time for direction adjustment increases
Solution Approach 1:
The system pre-calculates and stores correspondence relationships between emission directions and timing information before actual detection begins. During operation, the controller directly retrieves and applies the appropriate drive signal amplitude based on the current elapsed time, eliminating the need for real-time directional calculations and reducing direction adjustment time while maintaining high accuracy.
Solution Approach 2:
The controller uses feedback from the elapsed time information and stored correspondence data to dynamically adjust the drive signal amplitude and pixel switching timing. This closed-loop approach ensures that direction adjustments are made at optimal moments, minimizing adjustment time while maintaining alignment accuracy between estimated and actual emission directions.
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 configuration reduces the difference between estimated and actual emission directions, enhancing the accuracy of distance and image information acquisition by aligning optical axes and optimizing detection timing.
Implementation Method 1
a propagation direction modifier 16 including a MEMS mirror
Implementation Method 2
switches a pixel px in the propagation unit 20 between a first state of reflecting electromagnetic waves incident on the pixel px towards the first detector 17
Data Source
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AI summary
An electromagnetic wave detection apparatus (10) includes an irradiator (11), a first detector (17), a propagation unit (20), a memory (13), and a controller (14). The irradiator (11) irradiates electromagnetic waves. The first detector (17) detects reflected waves of the electromagnetic waves irradiated onto an object (ob). The propagation unit (20) includes propagation elements (px). By irradiation position of the electromagnetic waves irradiated onto the object (ob), the propagation elements (px) switch between propagating and not propagating the reflected waves of the electromagnetic waves towards the first detector (17). The memory (13) stores related information. The controller (14) updates the related information based on the position of the propagation element (px) that is propagating the reflected waves toward the first detector (17) when the first detector (17) detects the reflected waves.