Design of achromatic phase shifters for spaceborne nulling interferometry

Details Design of achromatic phase shifters for spaceborne nulling interferometry Design of achromatic phase shifters for spaceborne nulling interferometry

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006optl...31.3635h&link_type=abstract

Optics Letters, vol. 31, Issue 24, pp.3635-3637

Physics

Optics

Phase Shift, Fourier Optics, Fourier Transforms, Geometrical Optics, Optical Design, Astronomical Optics

Scientific paper

The designs of various achromatic phase shifters (APSs) envisaged for nulling interferometry and the search for extrasolar planets or systems from space are discussed in this Letter. It is shown that APS designs can sensibly influence the performance achieved by a simple Bracewell interferometer if they introduce a field of view (FoV) reversal and a pupil flip along one interferometer arm. Analytical and numerical simulations are presented, showing severe signal-to-noise ratio loss and a weak capacity for serendipitous discoveries. The use of FoV-reversal APS should therefore be restricted to the characterization of already known extrasolar planets rather than to their detection.

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