Recent Progress in Vector Vortex Coronagraphy
Abstract
The optical vortex coronagraph has great potential for enabling high-contrast observations very close to bright stars, and thus for reducing the size of space telescopes needed for exoplanet characterization missions. Here we discuss several recent developments in optical vortex coronagraphy. In particular, we describe multi-stage vortex configurations that allow the use of on-axis telescopes for high-contrast coronagraphy, and also enable the direct measurement of the amplitudes and phases of focal plane speckles. We also briefly describe recent laboratory demonstrations of the optical properties of the dual-stage vortex, and of the broadband performance of single stage vortex masks. Indeed, the demonstrated performance of the vector vortex phase masks already in hand, ≈ 10^(-8), is approximately that needed for an initial coronagraphic mission, such as an exoplanet explorer, aimed at detecting exozodiacal light and jovian exoplanets.
Additional Information
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). September 14, 2011. This work was carried out at the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA).Attached Files
Published - 396479.pdf
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Additional details
- Eprint ID
- 57800
- Resolver ID
- CaltechAUTHORS:20150526-093241463
- NASA/JPL/Caltech
- Created
-
2015-05-26Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 8146