Temporally-stable active precision mount for large optics.

We present a temporally-stable active mount to compensate for manufacturing-induced deformations of reflective optical components. In this paper, we introduce the design of the active mount, and its evaluation results for two sample mirrors: a quarter mirror of 115 × 105 × 9 mm, and a full mirror of 228 × 210 × 9 mm. The quarter mirror with 20 actuators shows a best wavefront error rms of 10 nm.