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Proceedings Paper

Development of a wavefront correction system for the SPICA coronagraph instrument
Author(s): Takayuki Kotani; Keigo Enya; Takao Nakagawa; Lyu Abe; Kanae Haze; Shin Higuchi; Yoshio Tange
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Paper Abstract

We present the laboratory demonstration of a wavefront correction system for the SPICA project. We have been developing SPICA Coronagraph Instrument (SCI) for exoplanet detection and characterization. SCI employs a wavefront correction system with a 1024-element deformable mirror. The laboratory experiments demonstrated that 106 dynamic ranges at 3.5 λ/D can be achieved after speckle nulling by using a DM at the He-Ne laser wavelength. We also started a wide-band wavefront correction experiment in the visible wavelengths. The combination of wide-band speckle nulling algorithm and a binary pupil mask will lead to a very wide-band, high contrast imaging system.

Paper Details

Date Published: 10 August 2010
PDF: 6 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77314F (10 August 2010); doi: 10.1117/12.857083
Show Author Affiliations
Takayuki Kotani, Japan Aerospace Exploration Agency (Japan)
Keigo Enya, Japan Aerospace Exploration Agency (Japan)
Takao Nakagawa, Japan Aerospace Exploration Agency (Japan)
Lyu Abe, Univ. de Nice Sophia Antipolis (France)
Kanae Haze, The Graduate Univ. for Advanced Studies (Japan)
Shin Higuchi, The Univ. of Tokyo (Japan)
Yoshio Tange, Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann Jr.; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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