The Multiple Mirror Telescope is an array of six 1.8 m diameter folded Cassegrain telescopes used to achieve the collecting area equivalent to that of a telescope with a single 4.5 m primary mirror. For most applications, the six images are co-aligned in such a way that overlapping images appear to result from a single telescope. Another application requires that the wavefronts from all six telescopes be co-phased within 1 micron, concurrent with co-alignment. This paper describes the successful operation of the co-alignment and co-phasing capabilities, the control system and devices used in the applications, and test results to date.
C. C. Janes,
J. W. Montgomery,
"Co-Phasing And Co-Aligning The Multiple Mirror Telescope", Proc. SPIE 0748, Structural Mechanics of Optical Systems II, (3 June 1987); doi: 10.1117/12.939813; https://doi.org/10.1117/12.939813