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Proceedings Paper

MEMS phase former kit for high-resolution wavefront control
Author(s): Andreas Gehner; Michael Wildenhain; Hannes Neumann; Andreas Elgner; Harald Schenk
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Paper Abstract

The MEMS Phase Former Kit developed by the Fraunhofer IPMS is a complete Spatial Light Modulator system based on a piston-type Micro Mirror Array (MMA) for the use in high-resolution, high-speed optical phase control. It has been designed for an easy system integration into an user-specific environment to offer a platform for first practical investigations to open up new applications in Adaptive Optics. The key component is a fine segmented 240 x 200 array of 40 μm piston-type mirror elements capable of 400 nm analog deflection for a 2pi phase modulation in the visible. Each mirror can be addressed and deflected independently by means of an integrated CMOS backplane address circuitry at an 8bit height resolution. Full user programmability and control is provided by a newly developed comfortable driver software for Windows XP based PCs supporting both a Graphical User Interface (GUI) for stand-alone operation with pre-defined data patterns as well as an open ActiveX programming interface for a closed-loop operation with real-time data from an external source. An IEEE1394a FireWire interface is used for high-speed data communication with an electronic driving board performing the actual MMA programming and control allowing for an overall frame rate of up to 500 Hz. Successful proof-of-concept demonstrations already have been given for eye aberration correction in ophthalmology, for error compensation of leightweight primary mirrors of future space telescopes and for ultra-short laser pulse shaping. Besides a presentation of the basic device concept and system architecture the paper will give an overview of the obtained results from these applications.

Paper Details

Date Published: 18 August 2005
PDF: 14 pages
Proc. SPIE 5894, Advanced Wavefront Control: Methods, Devices, and Applications III, 58940H (18 August 2005); doi: 10.1117/12.618326
Show Author Affiliations
Andreas Gehner, Fraunhofer Institute for Photonic Microsystems (Germany)
Michael Wildenhain, Fraunhofer Institute for Photonic Microsystems (Germany)
Hannes Neumann, Fraunhofer Institute for Photonic Microsystems (Germany)
Andreas Elgner, Fraunhofer Institute for Photonic Microsystems (Germany)
Harald Schenk, Fraunhofer Institute for Photonic Microsystems (Germany)

Published in SPIE Proceedings Vol. 5894:
Advanced Wavefront Control: Methods, Devices, and Applications III
Mark T. Gruneisen; John D. Gonglewski; Michael K. Giles, Editor(s)

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