TMT Optics Discussions with Industry - Thirty Meter Telescope
TMT Optics Discussions with Industry - Thirty Meter Telescope
TMT Optics Discussions with Industry - Thirty Meter Telescope
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The <strong>TMT</strong> Primary Mirror (M1)<br />
Segment Parameters<br />
– Low Expansion glass or glass-ceramic<br />
– ~1.44m x 45mm thick<br />
Segments mounted to mirror cell<br />
– Each an off-axis asphere<br />
Maximum asphericity is 225μm<br />
– 2.5mm gaps, 0.5mm edge bevels<br />
Segment Support Assembly (SSA):<br />
– Provides passive support for<br />
3 in-plane DOF<br />
2 lateral directions and clocking<br />
– Permits active control of<br />
3 out-of-plane DOF by M1CS<br />
Piston/Tip/Tilt<br />
– Periodic shape correction by M1CS<br />
21 DOF Warping Harness<br />
<strong>TMT</strong>.OPT.PRE.09.099.DRF03 8
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