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Optics Letters

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  • Vol. 36, Iss. 8 — Apr. 15, 2011
  • pp: 1506–1508

Improved high-contrast imaging with on-axis telescopes using a multistage vortex coronagraph

Dimitri Mawet, Eugene Serabyn, J. Kent Wallace, and Laurent Pueyo  »View Author Affiliations


Optics Letters, Vol. 36, Issue 8, pp. 1506-1508 (2011)
http://dx.doi.org/10.1364/OL.36.001506


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Abstract

The vortex coronagraph is one of the most promising coronagraphs for high-contrast imaging because of its simplicity, small inner working angle, high throughput, and clear off-axis discovery space. However, as with most coronagraphs, centrally obscured on-axis telescopes degrade contrast. Based on the remarkable ability of vortex coronagraphs to move light between the interior and exterior of pupils, we propose a method based on multiple vortices, that without sacrificing throughput, reduces the residual light leakage to (a/A)n, with n≥4, and a and A being the radii of the central obscuration and primary mirror, respectively. This method thus enables high contrasts to be reached even with an on-axis telescope.

© 2011 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(110.6770) Imaging systems : Telescopes
(350.1260) Other areas of optics : Astronomical optics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 16, 2010
Revised Manuscript: March 3, 2011
Manuscript Accepted: March 3, 2011
Published: April 15, 2011

Citation
Dimitri Mawet, Eugene Serabyn, J. Kent Wallace, and Laurent Pueyo, "Improved high-contrast imaging with on-axis telescopes using a multistage vortex coronagraph," Opt. Lett. 36, 1506-1508 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-8-1506


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References

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