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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4574–4582

Coronagraphs adapted to atmosphere conditions

Miguel A. Cagigas, Pedro J. Valle, and Manuel P. Cagigal  »View Author Affiliations


Optics Express, Vol. 20, Issue 4, pp. 4574-4582 (2012)
http://dx.doi.org/10.1364/OE.20.004574


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Abstract

In this paper we show new ways to improve the performance of ground-based coronagraphy. We introduce adaptive coronagraphic masks whose profile is a binary version of the instantaneous atmospherically degraded star image. We also propose the hyper-Gaussian profile masks obtained by averaging adaptive masks. In addition, adaptive Lyot stops and hyper-Gaussian Lyot stops are analyzed. Computer simulations show that all these masks outperform the circular hard-edged mask and that a proper mask and stop combination significantly reduces the angular separation at which a faint companion can be detected.

© 2012 OSA

OCIS Codes
(100.2980) Image processing : Image enhancement
(110.2970) Imaging systems : Image detection systems
(110.6770) Imaging systems : Telescopes
(350.1260) Other areas of optics : Astronomical optics

ToC Category:
Imaging Systems

History
Original Manuscript: October 24, 2011
Revised Manuscript: December 27, 2011
Manuscript Accepted: January 22, 2012
Published: February 9, 2012

Citation
Miguel A. Cagigas, Pedro J. Valle, and Manuel P. Cagigal, "Coronagraphs adapted to atmosphere conditions," Opt. Express 20, 4574-4582 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-4-4574


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