Papers by Antonio Bianchini
We numerically estimate the theoretical efficiency of an optical vortex coronagraph with a N-step... more We numerically estimate the theoretical efficiency of an optical vortex coronagraph with a N-step spiral phase plate in its optical path in the super-resolution regime, i.e., when the separation of the two sources are below the Rayleigh separability criterion. In this condition this coronagraph is expected to be quite efficient. The contrast achieved by the instrument decreases from its ideal limit, a fraction of the light from the secondary source is detected and it increases with the number of steps and the angular separation of the two stars.
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Papers by Antonio Bianchini