O. Absil

Aperture masking interferometry with ELT-METIS

We present sparse-aperture masks for the L/M- and N-band imaging channels of METIS on the ESO ELT. The 6-hole mask forms six ∼4m sub-apertures with Keck-like collecting area and non-redundant baselines for broadband (∼20%) filters. The 12-hole mask forms twelve ∼1.6m sub-apertures, conceptually similar to a VLTI-AT arr...