Wavefront correction with a ferrofluid deformable mirror: experimental results and recent developments

Details Wavefront correction with a ferrofluid deformable mirror: experimental results and recent developments Wavefront correction with a ferrofluid deformable mirror: experimental results and recent developments

2008-07-15

arxiv.org/abs/0807.2397v1

Astronomy and Astrophysics

Astrophysics

To appear in "Ground-based and Airborne Instrumentation for Astronomy II" SPIE conference, Marseille, 23-28 June 2008

Scientific paper

10.1117/12.787840

We present the research status of a deformable mirror made of a magnetic liquid whose surface is actuated by a triangular array of small current carrying coils. We demonstrate that the mirror can correct a 11 microns low order aberrated wavefront to a residual RMS wavefront error 0.05 microns. Recent developments show that these deformable mirrors can reach a frequency response of several hundred hertz. A new method for linearizing the response of these mirrors is also presented.

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