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Table 2

Specifications of the mirrors included in the optical path of EST.

Diameter [m] Focal length [m] Conic constant Coating
M1 4.2 6.3 −0.9954 Ag/Al
M2 0.8 1/DM −0.6344 Ag
M3 0.065 DM Flat Ag
M4 0.077 DM Flat Ag
M5 0.082 DM Flat Ag
M6 0.116 DM Flat Ag

Notes. Mirrors M3 to M6 are flat. DM stands for deformable mirror.

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