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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 20 — Jul. 10, 2014
  • pp: 4565–4579

Fast & Furious focal-plane wavefront sensing

Visa Korkiakoski, Christoph U. Keller, Niek Doelman, Matthew Kenworthy, Gilles Otten, and Michel Verhaegen  »View Author Affiliations


Applied Optics, Vol. 53, Issue 20, pp. 4565-4579 (2014)
http://dx.doi.org/10.1364/AO.53.004565


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Abstract

We present two complementary algorithms suitable for using focal-plane measurements to control a wavefront corrector with an extremely high-spatial resolution. The algorithms use linear approximations to iteratively minimize the aberrations seen by the focal-plane camera. The first algorithm, Fast & Furious (FF), uses a weak-aberration assumption and pupil symmetries to achieve fast wavefront reconstruction. The second algorithm, an extension to FF, can deal with an arbitrary pupil shape; it uses a Gerchberg–Saxton (GS)-style error reduction to determine the pupil amplitudes. Simulations and experimental results are shown for a spatial-light modulator controlling the wavefront with a resolution of 170×170pixels. The algorithms increase the Strehl ratio from 0.75 to 0.98–0.99, and the intensity of the scattered light is reduced throughout the whole recorded image of 320×320pixels. The remaining wavefront rms error is estimated to be 0.15rad with FF and 0.10rad with FF-GS.

© 2014 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(220.1080) Optical design and fabrication : Active or adaptive optics

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: March 7, 2014
Revised Manuscript: May 26, 2014
Manuscript Accepted: June 2, 2014
Published: July 9, 2014

Citation
Visa Korkiakoski, Christoph U. Keller, Niek Doelman, Matthew Kenworthy, Gilles Otten, and Michel Verhaegen, "Fast & Furious focal-plane wavefront sensing," Appl. Opt. 53, 4565-4579 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-20-4565

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