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Electric field conjugation with the project 1640 coronagraph

Cady, Eric and Baranec, Christoph and Beichman, Charles and Dekany, Richard and Hale, David and Hillenbrand, Lynne and Hinkley, Sasha (2013) Electric field conjugation with the project 1640 coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets VI. Proceedings of SPIE. No.8864. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 88640K . ISBN 9780819497147.

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The Project 1640 instrument on the 200-inch Hale telescope at Palomar Observatory is a coronagraphic instru- ment with an integral eld spectrograph at the back end, designed to nd young, self-luminous planets around nearby stars. To reach the necessary contrast for this, the PALM-3000 adaptive optics system corrects for fast atmospheric speckles, while CAL, a phase-shifting interferometer in a Mach-Zehnder con guration, measures the quasistatic components of the complex electric eld in the pupil plane following the coronagraphic stop. Two additional sensors measure and control low-order modes. These eld measurements may then be combined with a system model and data taken separately using a white-light source internal to the AO system to correct for both phase and amplitude aberrations. Here, we discuss and demonstrate the procedure to maintain a half-plane dark hole in the image plane while the spectrograph is taking data, including initial on-sky performance.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Cady, Eric0000-0002-8789-2931
Baranec, Christoph0000-0002-1917-9157
Beichman, Charles0000-0002-5627-5471
Hinkley, Sasha0000-0001-8074-2562
Additional Information:© 2013 Society of Photo-optical Instrumentation Engineers (SPIE). This work was performed in part at the Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Series Name:Proceedings of SPIE
Issue or Number:8864
Record Number:CaltechAUTHORS:20180717-155315869
Persistent URL:
Official Citation:Eric Cady, Christoph Baranec, Charles Beichman, Douglas Brenner, Rick Burruss, Justin Crepp, Richard Dekany, David Hale, Lynne Hillenbrand, Sasha Hinkley, E. Robert Ligon, Thomas Lockhart, Ben Oppenheimer, Ian Parry, Laurent Pueyo, Emily Rice, Lewis C. Roberts, Jennifer Roberts, Michael Shao, Anand Sivaramakrishnan, Remi Soummer, Hong Tang, Tuan Truong, Gautam Vasisht, Fred Vescelus, J. Kent Wallace, Chengxing Zhai, Neil Zimmerman, "Electric field conjugation with the project 1640 coronagraph", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640K (26 September 2013); doi: 10.1117/12.2024635;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87946
Deposited By: Tony Diaz
Deposited On:17 Jul 2018 23:44
Last Modified:16 Nov 2021 00:22

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