Hartmann-Shack measurements of ferrofluidic mirror dynamics

A. Seaman; J. B. Macpherson; E. F. Borra; A. M. Ritcey; D. Asselin; H. Jerominek; S. Thibault; M. C. W. Campbell

doi:10.1117/12.778510

30 October 2007 Hartmann-Shack measurements of ferrofluidic mirror dynamics

A. Seaman, J. B. Macpherson, E. F. Borra, A. M. Ritcey, D. Asselin, H. Jerominek, S. Thibault, M. C. W. Campbell

Proceedings Volume 6796, Photonics North 2007; 679603 (2007) https://doi.org/10.1117/12.778510
Event: Photonics North 2007, 2007, Ottawa, Canada

Abstract

Ferrofluid mirrors have the potential to be an inexpensive adaptive optical element which can be used to improve images of structures at the rear of the eye. Their low cost could allow adaptive optics technology to find widespread use in clinical settings. As discussed elsewhere1, their stroke and speed are suitable for correcting the aberrations of the human eye. We present work on the static and dynamic responses of these mirrors using a Hartmann-Shack wavefront reconstruction technique. The displacement of the mirror versus the current in the magnetic field actuators has been measured, as well as actuator influence functions (including non-linearities). In addition, the real-time dynamics of the mirror have been characterized.

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A. Seaman, J. B. Macpherson, E. F. Borra, A. M. Ritcey, D. Asselin, H. Jerominek, S. Thibault, and M. C. W. Campbell "Hartmann-Shack measurements of ferrofluidic mirror dynamics", Proc. SPIE 6796, Photonics North 2007, 679603 (30 October 2007); https://doi.org/10.1117/12.778510

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