12 August 2010 Experimental analysis of diffraction effects from a segmented MEMS deformable mirror for a closed loop adaptive optics system
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Abstract
Micro-Electro-Machined Systems (MEMS) have been increasingly used as mirrors in place of conventional continuous face sheet deformable mirrors (DM) in adaptive optics (AO) systems. Here we study the diffraction effects introduced into the optical path when a segmented MEMS DM is used to correct for the wavefront aberrations. Diffraction effects are monitored through the intermediate focus plane prior to the wavefront sensor. Low pass spatial filter is used at that plane in order to investigate how the masking of various diffraction orders affects the phase. Measured phase and focal image plane data for various turbulence conditions are presented and analyzed.
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Katia Shtyrkova, Loretta Arguello, Denis Oesch, Darryl J. Sanchez, Patrick Kelly, Carolyn Tewksbury-Christle, Julie Smith, "Experimental analysis of diffraction effects from a segmented MEMS deformable mirror for a closed loop adaptive optics system", Proc. SPIE 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII, 781608 (12 August 2010); doi: 10.1117/12.861544; https://doi.org/10.1117/12.861544
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