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HCIT broadband contrast performance sensitivity studies

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dc.contributor.advisor Instrumentation and Photography en_US Sidick, Erkin Shaklan, Stuart Balasubramanian, Kunjithapatham 2012-11-07T22:48:44Z 2012-11-07T22:48:44Z 2012-08-12
dc.identifier.citation SPIE Optics and Photonics 2012, San Diego, California, August 12-16,2012 en_US
dc.identifier.clearanceno 12-3056
dc.description.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. 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 Coronagraphy en_US
dc.subject adaptive optics en_US
dc.subject space telescopes en_US
dc.subject exoplanets en_US
dc.title HCIT broadband contrast performance sensitivity studies en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Astronomy en_US

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