By adjustment of the optical pathlengths of the MMT telescopes, it is possible to make the MMT into a phased array with a 680 cm baseline. We will describe experiments in speckle interferometry and spectroscopy which have been done this way using 2 and 3 of the MMT telescopes. We will describe planned adjustments of the optical configuration of the MMT to achieve coherent operation over a large field of view with all six telescopes phased simultaneously.
J. M. Beckers,
E. K. Hege,
P. A. Strittmatter,
"Optical Interferometry With The MMT", Proc. SPIE 0444, Advanced Technology Optical Telescopes II, (3 November 1983); doi: 10.1117/12.937961; https://doi.org/10.1117/12.937961