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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 8239–8250

Linearization of the response of a 91-actuator magnetic liquid deformable mirror

Denis Brousseau, Ermanno F. Borra, Maxime Rochette, and Daniel Bouffard Landry  »View Author Affiliations

Optics Express, Vol. 18, Issue 8, pp. 8239-8250 (2010)

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We present the experimental performance of a 91-actuator deformable mirror made of a magnetic liquid (ferrofluid) using a new technique that linearizes the response of the mirror by superposing a uniform magnetic field to the one produced by the actuators. We demonstrate linear driving of the mirror using influence functions, measured with a Fizeau interferometer, by producing the first 36 Zernikes polynomials. Based on our measurements, we predict achievable mean PV wavefront amplitudes of up to 30 µm having RMS residuals of λ/10 at 632.8 nm. Linear combination of Zernikes and over-time repeatability are also demonstrated.

© 2010 OSA

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(220.1000) Optical design and fabrication : Aberration compensation
(220.4840) Optical design and fabrication : Testing

ToC Category:
Adaptive Optics

Original Manuscript: January 13, 2010
Revised Manuscript: March 17, 2010
Manuscript Accepted: March 18, 2010
Published: April 5, 2010

Denis Brousseau, Ermanno F. Borra, Maxime Rochette, and Daniel Bouffard Landry, "Linearization of the response of a 91-actuator magnetic liquid deformable mirror," Opt. Express 18, 8239-8250 (2010)

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