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Electrostatic Micromachined Resonating Micro-Scanner for Circumferential Endoscopic Bio-Imaging

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7 Author(s)
Mu, X. ; National University of Singapore, Singapore ; Zhou, G. ; Yu, H. ; Tsai, J.M.-L.
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An electrostatic actuation-based resonating microelectromechanical systems (MEMS) polygonal mirror micro-scanner is developed for endoscopic probes used in clinical investigations. Microassembly technology is utilized to construct this device, which consists of a micro-actuator of four sets of electrostatic comb-drive resonators and an eight-slanted-facet highly reflective pyramidal polygon micro-reflector. The pyramidal polygon micro-reflector is developed using high precision diamond turning and soft lithography molding technologies. An optical scan angle of near-360 degrees is achieved at a resonant frequency of 180 Hz when driven by electrostatic comb-drive resonators with 80 Vpp ac voltage.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 8 )

Date of Publication:

April15, 2013

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