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Gaia primary mirror

Gaia primary mirror


Date: 13 September 2010
Satellite: Gaia
Depicts: Primary Mirror
Copyright: Image courtesy of Sagem, France

One of the Gaia primary (M1) mirrors, pictured at the premises of Sagem, France.

Each M1 mirror has dimensions of 1.49 × 0.54 m, and weighs about 40 kg. They are constructed from sintered silicon carbide (SiC), which results in a lightweight, strong and rigid mirror.

The mirror blanks were made by Boostec, France, and then coated with a thin layer of silicon carbide (by chemical vapour deposition) by Schunk Kohlenstofftechnik, Germany. Polishing is performed by Sagem, France.

Last Update: 1 September 2019
10-Jul-2020 01:21 UT

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