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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 12 — Jun. 15, 2007
  • pp: 1743–1745

Lateral scanning confocal microscopy for the determination of in-plane displacements of microelectromechanical systems devices

Zhi Li, Konrad Herrmann, and Frank Pohlenz  »View Author Affiliations


Optics Letters, Vol. 32, Issue 12, pp. 1743-1745 (2007)
http://dx.doi.org/10.1364/OL.32.001743


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Abstract

A method named lateral scanning confocal microscopy (LtSCM) is proposed with the aim of determining the in-plane displacement of microstructures, especially of those moving components within microelectromechanical systems (MEMS) actuators and sensors, which feature high aspect ratio and limited geometrical size in one or two dimensions within the surface plane. The principle of the LtSCM is presented and theoretically analyzed, which indicates that the LtSCM has the potential to determine with high resolution the in-plane displacement, position, and even the geometrical size of the object. Furthermore, in the case of in-plane displacement measurement, the measurement resolution of the LtSCM should be insensitive to the dynamic performance of the movable microstructures, i.e., from quasi-static to ultrahigh speed. In a proof-of-principle experiment, the voltage-displacement response of an electrostatic comb-drive actuator has been obtained with nanometric resolution.

© 2007 Optical Society of America

OCIS Codes
(180.1790) Microscopy : Confocal microscopy
(180.5810) Microscopy : Scanning microscopy

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: January 17, 2007
Revised Manuscript: April 20, 2007
Manuscript Accepted: April 20, 2007
Published: June 7, 2007

Virtual Issues
Vol. 2, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Zhi Li, Konrad Herrmann, and Frank Pohlenz, "Lateral scanning confocal microscopy for the determination of in-plane displacements of microelectromechanical systems devices," Opt. Lett. 32, 1743-1745 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-12-1743


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