title: Symmetric nulling coronagraph based on a rotational shearing interferometer.
abstract: We describe a fully symmetric nulling coronagraph for single-aperture telescopes that is based on a rotational shearing interferometer (RSI) and that is intended for the imaging of faint companions to nearby bright stars. In the proposed layout, all asymmetries inherent in previous single-aperture RSI-based nulling coronagraphs have been eliminated, and the bright and dark outputs are both accessible. As a resulty deep, broadband, dual-polarization rejection of on-axis starlight should be possible with this system.
authors.affiliation: Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102-1982, USA. deqing.ren@njit.edu
authors.forename: Deqing
authors.initials: D
authors.lastname: Ren
authors.forename: Eugene
authors.initials: E
authors.lastname: Serabyn