28 June 2006 Nanoengineered ferrofluid deformable mirrors: a progress report
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Abstract
We give a progress report on a new class of versatile optical elements pioneered by our laboratory. By coating ferromagnetic liquids we create reflective surfaces that can be shaped with magnetic fields, allowing us to make complex wavefronts that can vary rapidly in time. This new technology is capable of achieving complex surfaces that cannot be obtained with existing technology. The short-term objective is to perfect the technology for adaptive optics for both astronomical and ophthalmology applications. We have made a functional 112 actuator deformable mirror and characterized the ferrohydrodynamic response of the actuators. We have used high speed sensors to analyze the mirror surface subject to transient and periodic driving forces. We have developed algorithms to shape the surfaces. We have made new types of ferrofluids that are easier to coat with our nanoengineered layers. Theoretical model shown how the mirror parameters can be tuned as function of the applications. Challenges in design are outlined, as are advantages over traditional deformable mirrors.
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S. Thibault, D. Brousseau, M. Rioux, S. Senkow, J.-P. Déry, E. F. Borra, A. Ritcey, "Nanoengineered ferrofluid deformable mirrors: a progress report", Proc. SPIE 6272, Advances in Adaptive Optics II, 62723I (28 June 2006); doi: 10.1117/12.670297; https://doi.org/10.1117/12.670297
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