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Laboratory demonstration of a dual-stage vortex coronagraph

Serabyn, Eugene and Liewer, Kurt and Mawet, Dimitri (2016) Laboratory demonstration of a dual-stage vortex coronagraph. Optics Communications, 379 . pp. 64-67. ISSN 0030-4018. doi:10.1016/j.optcom.2016.05.042.

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While an ideal optical vortex coronagraph operating behind a clear, circular, unaberrated telescope aperture can theoretically provide perfect rejection of the incident plane wave from an unresolved star, use of a telescope with an on-axis secondary mirror limits the rejection. In theory, a dual-stage vortex coronagraph can provide improved starlight rejection for an on-axis telescope, and here we provide experimental confirmation of the predicted distribution of the residual light in the output pupil plane of a dual-stage vortex coronagraph. In addition, a simple method of further improving the rejection of such a coronagraph is suggested: by slightly oversizing the first Lyot stop and phase-shifting the light within the exposed annulus by half a wave, the residual starlight within the pupil can be canceled to deeper levels.

Item Type:Article
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Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2016 Elsevier. Received 22 February 2016, Revised 14 May 2016, Accepted 15 May 2016, Available online 1 June 2016. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA, United States.
Funding AgencyGrant Number
Subject Keywords:Coronagraphy; Starlight rejection; High contrast imaging
Record Number:CaltechAUTHORS:20160610-155813167
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Official Citation:Eugene Serabyn, Kurt Liewer, Dimitri Mawet, Laboratory demonstration of a dual-stage vortex coronagraph, Optics Communications, Volume 379, 15 November 2016, Pages 64-67, ISSN 0030-4018, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67857
Deposited By: George Porter
Deposited On:10 Jun 2016 23:04
Last Modified:11 Nov 2021 03:55

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