The technique of pupil densification bridges the gap existing between
conventionnal optical astronomy observing techniques and optical
interferometry: it indeed leads to the concept of hypertelescope: an
instrument that can provide direct images at the focus of an interferometer.
The hypertelescope is the open sesame for high dynamic imaging with an
interferometer: indeed, the elementary remapping of the pupil operated by a
densifier not only maximizes the dynamic range and the signal to noise ratio
of images but also makes the interferometer compatible with most existing
Moreover, a careful discussion about field of view show that for a diluted
array, the pupil densification preserves all the relevant high angular
resolution information collected by the interferometer and therefore induces
no field loss.