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Proceedings Paper

Astronomical coronagraphy with high-order adaptive optics systems
Author(s): James P. Lloyd; James R. Graham; Paul R. Kalas; Ben R. Oppenheimer; Anand Sivaramakrishnan; Russell B. Makidon; Bruce A. Macintosh; Claire E. Max; Pierre Baudoz; Jeff R. Kuhn; Dan Potter
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Paper Abstract

Space surveillance systems have recently been developed that exploit high order adaptive optics systems to take diffraction limited images in visible light on 4 meter class telescopes. Most astronomical targets are faint, thus driving astronomical AO systems towards larger subapertures, and thus longer observing wavelengths for diffraction limited imaging at moderate Strehl ratio. There is, however, a particular niche that can be exploited by turning these visible light space surveillance systems to astronomical use at infrared wavelengths. At the longer wavelengths, the Strehl ratio rises dramatically, thus placing more light into the diffracted Airy pattern compared to the atmospheric halo. A Lyot coronagraph can be used to suppress the diffracted light from an on axis star, and observe faint companions and debris disks around nearby, bright stars. These very high contrast objects can only be observed with much higher order adaptive optics systems than are presently available to the astronomical community. We describe simulations of high order adaptive optics coronagraphs, and outline a project to deploy an astronomical coronagraph at the Air Force AEOS facility at the Maui Space Surveillance System.

Paper Details

Date Published: 27 December 2001
PDF: 8 pages
Proc. SPIE 4490, Multifrequency Electronic/Photonic Devices and Systems for Dual-Use Applications, (27 December 2001); doi: 10.1117/12.455437
Show Author Affiliations
James P. Lloyd, Univ. of California/Berkeley (United States)
James R. Graham, Univ. of California/Berkeley (United States)
Paul R. Kalas, Univ. of California/Berkeley (United States)
Ben R. Oppenheimer, Univ. of California/Berkeley (United States)
Anand Sivaramakrishnan, Space Telescope Science Institute (United States)
Russell B. Makidon, Space Telescope Science Institute (United States)
Bruce A. Macintosh, Lawrence Livermore National Lab. (United States)
Claire E. Max, Lawrence Livermore National Lab. (United States)
Pierre Baudoz, Univ. of Hawaii/Institute for Astronomy (United States)
Jeff R. Kuhn, Univ. of Hawaii/Institute for Astronomy (United States)
Dan Potter, Univ. of Hawaii/Institute for Astronomy (United States)


Published in SPIE Proceedings Vol. 4490:
Multifrequency Electronic/Photonic Devices and Systems for Dual-Use Applications
Paul S. Idell; Stanley R. Czyzak; Andrew R. Pirich; Paul L. Repak; Paul S. Idell; Stanley R. Czyzak, Editor(s)

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