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28 July 2010 Ferrofluid deformable mirrors: recent advances and results
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Many technical improvements have been made since we first introduced deformable mirrors that use magnetic liquids (ferrofluids) whose surface are shaped by arrays of small electric coils. We present recent advances and experimental results of a 91-actuator magnetic liquid deformable mirror that uses a novel technique that linearizes their response by placing the array of actuators inside a strong and uniform magnetic field. We show that this improved ferrofluid deformable mirror (FDM) can produce inter-actuator strokes of over 10 μm, is capable of generating wavefront having peak-to-valley amplitudes of over 60 μm, and predict that amplitudes greater than 100 μm are achievable. We also present experimental results showing that these improved FDMs are good candidates for astronomical, vision science, and optical testing applications.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Brousseau and E. F. Borra "Ferrofluid deformable mirrors: recent advances and results", Proc. SPIE 7736, Adaptive Optics Systems II, 77362U (28 July 2010);

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