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Micromachines 2017, 8(12), 351;

Low-Cost High-Speed In-Plane Stroboscopic Micro-Motion Analyzer

Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA
Author to whom correspondence should be addressed.
Received: 13 November 2017 / Revised: 27 November 2017 / Accepted: 30 November 2017 / Published: 30 November 2017
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Instrumentation for high-speed imaging and laser vibrometry is essential for the understanding and analysis of microstructure dynamics, but commercial instruments are largely unaffordable for most microelectromechanical systems (MEMS) laboratories. We present the implementation of a very low cost in-plane micro motion stroboscopic analyzer that can be directly attached to a conventional probe station. The low-cost analyzer has been used to characterize the harmonic motion of 52.1 kHz resonating comb drive microactuators using ~50 ns pulsed light-emitting diode (LED) stroboscope exposure times, producing sharp and high resolution (~0.5 μm) device images at resonance, which rivals those of several orders of magnitude more expensive systems. This paper details the development of the high-speed stroboscopic imaging system and presents experimental results of motion analysis of example microstructures and a discussion of its operating limits. The system is shown to produce stable stroboscopic LED illumination to freeze device images up to 11 MHz. View Full-Text
Keywords: high speed imaging; stroboscope; vibration mode measurement high speed imaging; stroboscope; vibration mode measurement

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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    Description: Stroboscopic freeze frame imaging of comb-drive resonant motion at 52 kHz

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Pandey, S.S.; Banerjee, A.; Karkhanis, M.U.; Mastrangelo, C.H. Low-Cost High-Speed In-Plane Stroboscopic Micro-Motion Analyzer. Micromachines 2017, 8, 351.

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