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Common-path wavefront sensing for advanced coronagraphs

Show simple item record Wallace, J. Kent Serabyn, Eugene Mawet, Dimitri 2015-03-18T21:37:55Z 2015-03-18T21:37:55Z 2012-03-03
dc.identifier.citation 2012 IEEE Aerospace Conference, Big Sky, Montana, March 3-10, 2012 en_US
dc.identifier.clearanceno 12-0074
dc.description.abstract Imaging of faint companions around nearby stars is not limited by either intrinsic resolution of a coronagraph/telescope system, nor is it strictly photon limited. Typically, it is both the magnitude and temporal variation of small phase and amplitude errors imparted to the electric field by elements in the optical system which will limit ultimate performance. Adaptive optics systems, particularly those with multiple deformable mirrors, can remove these errors, but they need to be sensed in the final image plane. If the sensing system is before the final image plane, which is typical for most systems, then the non-common path optics between the wavefront sensor and science image plane will lead to un-sensed errors. However, a new generation of high-performance coronagraphs naturally lend themselves to wavefront sensing in the final image plane. These coronagraphs and the wavefront sensing will be discussed, as well as plans for demonstrating this with a high-contrast system on the ground. Such a system will be a key system-level proof for a future space-based coronagraph mission, which will also be discussed. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012 en_US
dc.subject High-contrast imaging en_US
dc.subject adaptive optics en_US
dc.subject space coronagraphs en_US
dc.title Common-path wavefront sensing for advanced coronagraphs en_US
dc.type Preprint en_US

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