The Visible Nulling Coronagraph--Progress Toward Technology Development and Mission Definition

Details The Visible Nulling Coronagraph--Progress Toward Technology Development and Mission Definition The Visible Nulling Coronagraph--Progress Toward Technology Development and Mission Definition

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20518006s&link_type=abstract

American Astronomical Society Meeting 205, #180.06; Bulletin of the American Astronomical Society, Vol. 37, p.385

Physics

Optics

Scientific paper

This paper describes a space mission for visible direct detection and spectroscopy of Earth like extrasolar planets using a nulling coronagraph instrument behind a moderately sized single aperture telescope in space. In our design, a nulling interferometer is synthesized from the telescope pupil, producing a deep null proportional to thetaN where N is 4 ˜6, depending on details of the nuller, which is then filtered by a coherent array of single mode fibers to suppress the residual scattered light. With diffraction limited telescope optics and similar quality components in the optical train (lambda/20), suppression of the starlight to 1e-10 is readily achievable. We describe key features of the basic analysis, show how this effects mission design, present latest results of laboratory measurements demonstrating achievable null depth and component development, and discuss future key technical milestones.
This work was preformed at the Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration.
Keywords: Extra-solar Planet Detection, Direct Planet detection, Nulling Interferometer, Coronagraph, Space Instrumentation

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