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Proceedings Article

Static and dynamic microdeformable mirror characterization by phase-shifting and time-averaged interferometry

[+] Author Affiliations
Arnaud Liotard, Fr‰d‰ric Zamkotsian

Lab. d'Astrophysique de Marseille (France)

Sylvaine Muratet, Jean-Yves Fourniols

Lab. d'Analyse et d'Architecture des Systemes (France)

Proc. SPIE 5716, Reliability, Packaging, Testing, and Characterization of MEMS/MOEMS IV, 207 (April 11, 2005); doi:10.1117/12.592150
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From Conference Volume 5716

  • Reliability, Packaging, Testing, and Characterization of MEMS/MOEMS IV
  • Danelle M. Tanner; Rajeshuni Ramesham
  • San Jose, CA | January 22, 2005

abstract

Since micro deformable mirrors based on Micro-Opto-Electronico-Mechanical Systems (MOEMS) technology would be essential in next generation adaptive optics system, we are designing, realizing, characterizing and modeling this key-component. Actuators and a continuous-membrane micro deformable mirror (3*3 actuators, 600*600 μm2) have been designed in-house and processed by surface micromachining in the Cronos foundry. A dedicated characterization bench has been developed for the complete analysis. This Twyman-Green interferometer allows high in-plane resolution (4 μm) or large field of view (40mm). Out-of-plane measurements are performed with phase-shifting interferometry showing highly repeatable results (standard deviation<5nm). Features such as optical quality or electro-mechanical behavior are extracted from these high precision three-dimensional component maps and FEM can be fitted. Dynamic analysis like vibration mode and cut-off frequency is realized with time-averaged interferometer. The deformable mirror exhibit a 350nm stroke for 35 volts on the central actuator. This limited stroke could be overcome by changing the components material and promising actuators are made with polymers.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Arnaud Liotard ; Sylvaine Muratet ; Fr‰d‰ric Zamkotsian and Jean-Yves Fourniols
"Static and dynamic microdeformable mirror characterization by phase-shifting and time-averaged interferometry", Proc. SPIE 5716, Reliability, Packaging, Testing, and Characterization of MEMS/MOEMS IV, 207 (April 11, 2005); doi:10.1117/12.592150; http://dx.doi.org/10.1117/12.592150


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