First M1 Roundels Produced by Coherent for TMT Successfully Shipped to Storage Facility in California

First M1 Roundels Produced by Coherent for TMT Successfully Shipped to Storage Facility in California

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TMT and Coherent reached a new milestone this month with the completion of the first two roundels for TMT’s Primary Mirror (M1). Coherent precisely contoured and polished the optical surfaces of the roundels under the direction of TIO. They are the first of 231 roundels Coherent will provide for the TMT primary mirror array, nearly half of the total of 492 required to complete the telescope.

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