An apodizing phase plate coronagraph for VLT/NACO

Details An apodizing phase plate coronagraph for VLT/NACO An apodizing phase plate coronagraph for VLT/NACO

2010-07-20

arxiv.org/abs/1007.3448v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

9 pages, 5 figures, to appear in Proc. SPIE Vol. 7735

Scientific paper

We describe a coronagraphic optic for use with CONICA at the VLT that provides suppression of diffraction from 1.8 to 7 lambda/D at 4.05 microns, an optimal wavelength for direct imaging of cool extrasolar planets. The optic is designed to provide 10 magnitudes of contrast at 0.2 arcseconds, over a D-shaped region in the image plane, without the need for any focal plane occulting mask.

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