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Micromachines 2017, 8(3), 72;

Magnetic Fluid Deformable Mirror with a Two-Layer Layout of Actuators †

Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China
Author to whom correspondence should be addressed.
Academic Editors: Wei Wang and Franck Chollet
Received: 3 January 2017 / Revised: 20 February 2017 / Accepted: 24 February 2017 / Published: 2 March 2017
(This article belongs to the Special Issue Optofluidics 2016)
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In this paper, a new type of magnetic fluid deformable mirror (MFDM) with a two-layer layout of actuators is proposed to improve the correction performance for full-order aberrations with a high spatial resolution. The shape of the magnetic fluid surface is controlled by the combined magnetic field generated by the Maxwell coil and the two-layer array of miniature coils. The upper-layer actuators which have a small size and high density are used to compensate for small-amplitude high-order aberrations and the lower-layer actuators which have a big size and low density are used to correct large-amplitude low-order aberrations. The analytical model of this deformable mirror is established and the aberration correction performance is verified by the experimental results. As a new kind of wavefront corrector, the MFDM has major advantages such as large stroke, low cost, and easy scalability and fabrication. View Full-Text
Keywords: magnetic fluid; deformable mirror; electromagnetic coil; two-layer; adaptive optics magnetic fluid; deformable mirror; electromagnetic coil; two-layer; adaptive optics

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Wu, Z.; Kong, X.; Zhang, Z.; Wu, J.; Wang, T.; Liu, M. Magnetic Fluid Deformable Mirror with a Two-Layer Layout of Actuators †. Micromachines 2017, 8, 72.

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