Figure 7
The stabilization of curvature for the three bimorph mirrors in the hour after applying +1000 V (dotted curves) or −1000 V (solid curves) to all piezos. A substantial improvement in the stability of the radius is observed for Mirror 3, a second-generation bimorph with flexible wire connections and clamped into an optimized opto-mechanical holder. Note that the direction of curvature drift of Mirror 3 is in the opposite sense to the two other mirrors |