Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.7712l&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #77.12; Bulletin of the American Astronomical Society, Vol. 33, p.904
Astronomy and Astrophysics
Astronomy
Scientific paper
We present laboratory tests of a novel pupil designed for terrestirial planet finding. The pupil (Spergel 2001) has been designed to give a deep null over a sizable portion of the field-of-view in the focal plane. Light in the region of the null can be reduced by as much as 1010 relative to the central spot intentisy. Along one axis in the focal plane, the null region begins at the position of what would have been the first Airy ring in a conventional coronagraph using a circular pupil HeNe and tunable lasers are used to generate focal patterns at a range of wavelengths in the visible spectrum. Comparisons will be presented bwteeen a uniformly-illuminated circular pupil and our Gaussian pupil
Littman Michael G.
Spergel David N.
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