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Figure 6
Fizeau interferometry capturing dynamic changes in the inverse radius of curvature of Mirror 2 (a super-polished first-generation bimorph) after a 1000 V impulse. The solid and dashed curves show curvature data with the HV power supply operating with different slew rates (high accuracy <10 V s−1 and fast = 50 V s−1). An intermediate jump to 500 V, or a higher voltage slew rate, did not change the decay rate of the radius of curvature.

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