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Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/42400

Title: HCIT broadband contrast performance sensitivity studies
Authors: Instrumentation and Photography
Sidick, Erkin
Shaklan, Stuart
Balasubramanian, Kunjithapatham
Keywords: Coronagraphy
adaptive optics
space telescopes
exoplanets
Issue Date: 12-Aug-2012
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012.
Citation: SPIE Optics and Photonics 2012, San Diego, California, August 12-16,2012
Abstract: The High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Laboratory employs a broadband wavefront correction algorithm called Electric Field Conjugation (EFC) to obtain the required 10-10 contrast. This algorithm works with one deformable mirror (DM) to estimate the electric-field to be controlled, and with one or multiple DM’s to create a “darkhole” in a predefined region of the image plane where terrestrial planets would be found. We have investigated the effects of absorbing dust particles on a flat optic, absorbing spots on the occulting mask, dead actuators on the DM, and the effects of control bandwidth on the efficiency of the EFC algorithm in a Lyot coronagraph configuration. The structural design of the optical system as well as the parameters of various optical elements used in the analysis is drawn from those of the HCIT system that have been implemented with one DM. The simulation takes into account the surface errors of various optical elements. Results of some of these studies have been verified by actual measurements.
URI: http://hdl.handle.net/2014/42400
Appears in Collections:JPL TRS 1992+

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