Wavefront correction with a 37-actuator ferrofluid deformable mirror
2007; Optica Publishing Group; Volume: 15; Issue: 26 Linguagem: Inglês
10.1364/oe.15.018190
ISSN1094-4087
AutoresDenis Brousseau, E. F. Borra, Simon Thibault,
Tópico(s)Optical Systems and Laser Technology
ResumoThis 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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