Imaging, Spectroscopic, High-Contrast, and Interferometric Instrumentation

Demonstration of broadband contrast at 1.2λ/D and greater for the EXCEDE starlight suppression system

[+] Author Affiliations
Dan Sirbu, Ruslan Belikov, Eduardo Bendek, Eugene Pluzhnik, Dana H. Lynch, Peter Zell

NASA Ames Research Center, Moffett Field, Mountain View, California 94035, United States

Sandrine J. Thomas

Large Synoptic Survey Telescope, Tucson, Arizona 85719, United States

Julien Lozi

National Astronomical Observatory of Japan, Subaru Telescope, Hilo, Hawaii 96720, United States

Troy Hix

Lockheed Martin Space Systems Company, Palo Alto, California 94304, United States

Olivier Guyon

National Astronomical Observatory of Japan, Subaru Telescope, Hilo, Hawaii 96720, United States

University of Arizona, Tucson, Arizona 85721, United States

Glenn Schneider

University of Arizona, Tucson, Arizona 85721, United States

J. Astron. Telesc. Instrum. Syst. 2(2), 025002 (May 09, 2016). doi:10.1117/1.JATIS.2.2.025002
History: Received December 3, 2015; Accepted March 31, 2016
Text Size: A A A

Abstract.  The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) science mission concept uses a visible-wavelength phase-induced amplitude apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar debris systems and some giant planets at angular separations reaching into the habitable zones of some of the nearest stars. We report on the experimental results obtained in the vacuum chamber at the Lockheed Martin Advanced Technology Center in 10% broadband light centered about 650 nm, with a median contrast of 1×105 between 1.2 and 2.0λ/D simultaneously with 3×107 contrast between 2 and 11λ/D for a single-sided dark hole using a deformable mirror (DM) upstream of the PIAA coronagraph. These results are stable and repeatable as demonstrated by three measurement runs with DM settings set from scratch and maintained on the best 90% out of the 1000 collected frames. We compare the reduced experimental data with simulation results from modeling observed experimental limits. The observed performance is consistent with uncorrected low-order modes not estimated by the low-order wavefront sensor. Modeled sensitivity to bandwidth and residual tip/tilt modes is well matched to the experiment.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Dan Sirbu ; Sandrine J. Thomas ; Ruslan Belikov ; Julien Lozi ; Eduardo Bendek, et al.
"Demonstration of broadband contrast at 1.2λ/D and greater for the EXCEDE starlight suppression system", J. Astron. Telesc. Instrum. Syst. 2(2), 025002 (May 09, 2016). ; http://dx.doi.org/10.1117/1.JATIS.2.2.025002


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Journal Articles

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.