Fast Tracking of Light Source with Micromirror and Associated Feedback Circuit

Author

Park, J.H. ; Chung, T. ; Park, I.H. ; Jeon, J.A. ; Yoo, B.W. ; Kim, M. ; Kim, Y.K.

Author_Institution

Res. Center of MEMS Space Telescope, Seoul

fYear

2007

fDate

Aug. 12 2007-July 16 2007

Firstpage

59

Lastpage

60

Abstract

In this paper, a closed-loop feedback control of a micromirror has been demonstrated to track a moving light source and to stabilize fast the tilting angle to follow the light source. An electrostatically actuated torsional micromirror was used as a test device. Tracking and tilt-angle stabilization has been tested using a position-sensing detector and analog feedback control circuit. We found a successful tracking of a moving light source and the feedback control to improve the response time of micromirrors significantly, down to 200 mus in comparison to about 600 mus for the case of absence of feedback control.

Keywords

light sources; micromirrors; optical feedback; optical testing; optical tracking; analog feedback control circuit; closed-loop feedback control; electrostatically actuated micromirror; feedback circuit; light source tracking; position-sensing detector; tilt-angle stabilization; Circuit testing; Delay; Feedback circuits; Feedback control; Laser feedback; Light sources; Micromirrors; Mirrors; Optical amplifiers; Springs;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical MEMS and Nanophotonics, 2007 IEEE/LEOS International Conference on

Conference_Location

Hualien

Print_ISBN

978-1-4244-0641-8

Type

conf

DOI

10.1109/OMEMS.2007.4373839

Filename

4373839