A 4-meter, Wide Field Coronagraph space Telescope for general astrophysics and exoplanet observations

Domenick Tenerelli, Roger Angel, Jim Burge, Olivier Guyon, Ann Zabludoff, Ruslan Belikov, Eugene Pluzhnik, Robert Egerman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 × 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 × 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.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2010
Subtitle of host publicationOptical, Infrared, and Millimeter Wave
DOIs
StatePublished - Oct 27 2010
EventSpace Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7731
ISSN (Print)0277-786X

Other

OtherSpace Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Keywords

  • 4-meter
  • Astrophysics
  • Coronagraph
  • Exoplanet
  • Off-axis
  • Telescope
  • Wide-field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Tenerelli, D., Angel, R., Burge, J., Guyon, O., Zabludoff, A., Belikov, R., Pluzhnik, E., & Egerman, R. (2010). A 4-meter, Wide Field Coronagraph space Telescope for general astrophysics and exoplanet observations. In Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave [77311N] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7731). https://doi.org/10.1117/12.860719