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Proceedings Paper

A 4-meter wide field coronagraph space telescope for general astrophysics and exoplanet observations
Author(s): Domenick Tenerelli; Roger Angel; Jim Burge; Olivier Guyon; Ann Zabludoff; Ruslan Belikov; Eugene Pluzhnik; Robert Egerman
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Paper Abstract

The Wide Field Coronagraph Telescope (WFCT) is a 4-meter space telescope for general astrophysics and exoplanet observations that meets the 2000 Decadal Committee requirements. This paper presents a design for a 4-m diameter, off-axis space telescope that offers high performance in both wide field and coronagraphic imaging modes. A 3.8 x 3.3-m unobstructed elliptical pupil is provided for direct coronagraphic imaging of exoplanets and a 4-m diameter pupil for wide-field imaging from far-ultraviolet (UV) to near-infrared (IR). The off-axis wide-field optics are all reflective and designed to deliver an average of 12 nm wavefront aberrations over a 6 x 24 arcminute field of view (FOV), therefore providing diffraction-limited images down to 300 nm wavelength and 15 mas images down to a wavelength limit set only by the mirror coatings. The coronagraph with phase-induced amplitude apodization (PIAA) provides diffraction suppression around a 360-degree field with high Strehl and sensitivity at the 1e-10 level to an inner working angle of 2 λ/D (or 50 mas at 500 nm wavelength). This paper focuses on the optical design that allows the above imaging features to be combined in single telescope, and gives a preliminary spacecraft design and costing, assuming a distant trailing orbit.

Paper Details

Date Published: 6 August 2010
PDF: 17 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77311N (6 August 2010); doi: 10.1117/12.860719
Show Author Affiliations
Domenick Tenerelli, Lockheed Martin Space Systems Co. (United States)
Roger Angel, The Univ. of Arizona (United States)
Jim Burge, The Univ. of Arizona (United States)
Olivier Guyon, The Univ. of Arizona (United States)
National Astronomical Observatory of Japan/Subaru Telescope (United States)
Ann Zabludoff, The Univ. of Arizona (United States)
Ruslan Belikov, ARC-SSA (United States)
Eugene Pluzhnik, ARC-SSA (United States)
Robert Egerman, ITT Corp. (United States)


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

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