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Two Dimensional Profilometer (2DP) used to polish the TMT primary mirror

November 7th, 2017

Credit: TMT International Observatory / Fred Kamphues

The metrology device used in the polishing process of Roundel production - Two Dimensional Profilometer (2DP) owned and operated by Coherent Inc - is shown above in a special-use case where it is validating the active warping of the Polished Mirror Assembly (PMA).