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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 19 — Sep. 17, 2007
  • pp: 12338–12343

Closed loop, DM diversity-based, wavefront correction algorithm for high contrast imaging systems

Amir Give’on, Ruslan Belikov, Stuart Shaklan, and Jeremy Kasdin  »View Author Affiliations

Optics Express, Vol. 15, Issue 19, pp. 12338-12343 (2007)

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High contrast imaging from space relies on coronagraphs to limit diffraction and a wavefront control systems to compensate for imperfections in both the telescope optics and the coronagraph. The extreme contrast required (up to 10-10 for terrestrial planets) puts severe requirements on the wavefront control system, as the achievable contrast is limited by the quality of the wavefront. This paper presents a general closed loop correction algorithm for high contrast imaging coronagraphs by minimizing the energy in a predefined region in the image where terrestrial planets could be found. The estimation part of the algorithm reconstructs the complex field in the image plane using phase diversity caused by the deformable mirror. This method has been shown to achieve faster and better correction than classical speckle nulling.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics

ToC Category:
Adaptive Optics

Original Manuscript: July 9, 2007
Revised Manuscript: September 6, 2007
Manuscript Accepted: September 9, 2007
Published: September 13, 2007

Amir Give'on, Ruslan Belikov, Stuart Shaklan, and Jeremy Kasdin, "Closed loop, DM diversity-based, wavefront correction algorithm for high contrast imaging systems," Opt. Express 15, 12338-12343 (2007)

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