Credit: TMT International Observatory, LLC
Fabricated by TMT-Japan, MSIT recreates a subset – approximately 1/70th - of the TMT primary mirror cell, and the segments it carries accurately recreate the unique hexagonal forms of the seven segments that will exist in the telescope in the same positions. Mirror segments in TMT are of 82 types – each one very slightly different – arranged in six identical sectors. MSIT contains segments from sectors D and E of the primary mirror.
