Improved high-contrast imaging with on-axis telescopes using a multistage vortex coronagraph
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.
Additional Information
© 2011 Optical Society of America. Received December 16, 2010; revised March 3, 2011; accepted March 3, 2011; posted March 22, 2011 (Doc. ID 139775); published April 15, 2011. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. L. Pueyo acknowledge support from the Carl Sagan Fellowship Program.Attached Files
Published - ol-36-8-1506.pdf
Submitted - 1103.1909v1.pdf
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Additional details
- Eprint ID
- 57709
- Resolver ID
- CaltechAUTHORS:20150520-111504686
- NASA/JPL/Caltech
- NASA Sagan Fellowship
- Created
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2015-05-20Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field