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Classically, optical and near-infrared interferometry have relied on closurephase techniques to produce images. Such techniques allow us to achieve modestdynamic ranges. In order to test the feasibility of next generation opticalinterferometers in the context of the VLTI-spectro-imager (VSI), we haveembarked on a study of image reconstruction and analysis. Our main aim was totest the influence of the number of telescopes, observing nights anddistribution of the visibility points on the quality of the reconstructedimages. Our results show that observations using six Auxiliary Telescopes (ATs)during one complete night yield the best results in general and is critical inmost science cases; the number of telescopes is the determining factor in theimage reconstruction outcome. In terms of imaging capabilities, an optical, sixtelescope VLTI-type configuration and ~200 meter baseline will achieve 4 masspatial resolution, which is comparable to ALMA and almost 50 times better thanJWST will achieve at 2.2 microns. Our results show that such an instrument willbe capable of imaging, with unprecedented detail, a plethora of sources,ranging from complex stellar surfaces to microlensing events.

Phase Closure Image Reconstruction for Future VLTI Instrumentation