Figure 3: Proposed Exo Earth Discoverer, a 1-to-100km interferometric array in space. With the 36 free-flying telescopes shown here the exit pupil can be densified for efficient imaging and coronagraphy. Collimated coudé beams from telescopes Ti are reflected from flat mirrors SR towards the concave image recombination mirror FM. For optical path equality, the telescopes are located on a paraboloïdal surface, with focus at SR and curvature center at the metrology satellite MS. The arrangement provides a compact exit pupil XP which is a densified version of the diluted entrance pupil EP. The full densification achievable with hexagonal sub-pupils favors coronagraphic masking (Lyot or Roddier type) in the recombined image and a relayed pupil downstream, at visible and infra-red wavelengths.