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Opt Express. 2007 Dec 24;15(26):18190-9.

Wavefront correction with a 37-actuator ferrofluid deformable mirror.

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  • 1Département de physique, génie physique et optique and Centre d'Optique Photonique et Laser (COPL), UniversitéLaval, Québec, Québec, Canada.


This paper discusses an innovative low-cost deformable mirror made of a magnetic liquid (ferrofluid) whose surface is actuated by an hexagonal array of small current carrying coils. Predicted and experimental performances of a 37-actuator ferrofluid deformable mirror are presented along with wavefront correction examples. We show the validity of the model used to compute the actuators currents to obtain a desired wavefront shape. We demonstrate that the ferrofluid deformable mirror can correct a 11 microm low order aberrated wavefront to a residual RMS error of 0.05 microm corresponding to a Strehl ratio of 0.82.

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