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Common-Path Wavefront Sensing for Advanced CoronagraphsImaging 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.
Document ID
20150008804
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Wallace, J. Kent
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Serabyn, Eugene
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mawet, Dimitri
(European Southern Observatory Garching, Germany)
Date Acquired
May 26, 2015
Publication Date
March 3, 2012
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: IEEE Aerospace Conference
Location: Big Sky, MT
Country: United States
Start Date: March 3, 2012
End Date: March 10, 2012
Sponsors: American Inst. of Aeronautics and Astronautics, Prognostics and Health Management Society (PHM), Institute of Electrical and Electronics Engineers
Distribution Limits
Public
Copyright
Other
Keywords
adaptive optics
High-contrast imaging
space coronagraphs

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