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Proceedings Paper

Optical position feedback for electrostatically driven MOEMS scanners
Author(s): A. Tortschanoff; M. Baumgart; A. Frank; M. Wildenhain; T. Sandner; H. Schenk; A. Kenda
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Paper Abstract

For MOEMS devices which do not have intrinsic on-chip feedback, position information can be provided with optical methods, most simply by using a reflection from the backside of a MOEMS scanner. Measurement of timing signals using fast differential photodiodes can be used for resonant scanner mirrors performing sinusoidal motion with large amplitude. While this approach provides excellent accuracy it cannot be directly extended to arbitrary trajectories or static deflection angles. Another approach is based on the measurement of the position of the reflected laser beam with a quadrant diode. In this work, we present position sensing devices based on either principle and compare both approaches showing first experimental results from the implemented devices

Paper Details

Date Published: 15 February 2012
PDF: 8 pages
Proc. SPIE 8252, MOEMS and Miniaturized Systems XI, 82520S (15 February 2012); doi: 10.1117/12.907761
Show Author Affiliations
A. Tortschanoff, Carinthian Tech Research AG (Austria)
M. Baumgart, Carinthian Tech Research AG (Austria)
A. Frank, Carinthian Tech Research AG (Austria)
M. Wildenhain, Fraunhofer Institute for Photonic Microsystems (Germany)
T. Sandner, Fraunhofer Institute for Photonic Microsystems (Germany)
H. Schenk, Fraunhofer Institute for Photonic Microsystems (Germany)
A. Kenda, Carinthian Tech Research AG (Austria)

Published in SPIE Proceedings Vol. 8252:
MOEMS and Miniaturized Systems XI
Harald Schenk; Wibool Piyawattanametha; Wilfried Noell, Editor(s)

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