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Title: Electric field reconstruction in the image plane of a high-contrast coronagraph using a set of pinholes around the Lyot plane.
Authors: Give'ona, Amir
Shaklan, Stuart
Kern, Brian
Noecker, Charley
Kendrick, Steve
Wallace, Kent
Keywords: high contrast imaging
Issue Date: 4-Jul-2012
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012.
Citation: SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012
Abstract: In a setup similar to the self coherent camera, we have added a set of pinholes in the di raction ring of the Lyot plane in a high-contrast stellar Lyot coronagraph. We describe a novel complex electric field reconstruction from image plane intensity measurements consisting of light in the coronagraph's dark hole interfering with light from the pinholes. The image plane field is modified by letting light through one pinhole at a time. In addition to estimation of the field at the science camera, this method allows for self-calibration of the probes by letting light through the pinholes in various permutations while blocking the main Lyot opening. We present results of estimation and calibration from the High Contrast Imaging Testbed along with a comparison to the pair-wise deformable mirror diversity based estimation technique. Tests are carried out in narrow-band light and over a composite 10% bandpass.
Appears in Collections:JPL TRS 1992+

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