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Proceedings Article

High-contrast imaging testbed for the Terrestrial Planet Finder coronagraph

[+] Author Affiliations
Andrew E. Lowman, John T. Trauger, Brian Gordon, Joseph J. Green, Dwight Moody, Albert F. Niessner, Fang Shi

Jet Propulsion Lab. (USA)

Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, 1246 (October 12, 2004); doi:10.1117/12.547710
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From Conference Volume 5487

  • Optical, Infrared, and Millimeter Space Telescopes
  • John C. Mather
  • USA | June 21, 2004

abstract

The Terrestrial Planet Finder (TPF) mission is planning to launch a visible coronagraphic space telescope in 2014. To achieve TPF science goals, the coronagraph must have extreme levels of wavefront correction (less than 1 Å rms over controllable spatial frequencies) and stability to get the necessary suppression of diffracted starlight (~1E-10 contrast at an angular separation ~4 lambda/D). TPF Coronagraph"s primary platform for experimentation is the High Contrast Imaging Testbed, which will provide laboratory validation of key technologies as well as demonstration of a flight-traceable approach to implementation. Precision wavefront control in the testbed is provided by a high actuator density deformable mirror. Diffracted light control is achieved through use of occulting or apodizing masks and stops. Contrast measurements will establish the technical feasibility of TPF requirements, while model and error budget validation will demonstrate implementation viability. This paper describes the current testbed design, development approach, and recent experimental results.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Andrew E. Lowman ; John T. Trauger ; Brian Gordon ; Joseph J. Green ; Dwight Moody, et al.
"High-contrast imaging testbed for the Terrestrial Planet Finder coronagraph", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, 1246 (October 12, 2004); doi:10.1117/12.547710; http://dx.doi.org/10.1117/12.547710


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