Metrological control of PIAACMC mirrors. Top row: 2D map of Ml and M2 obtained with a ZYGO interferometer (12 mm diameter). Middle row: Residual errors (specification map subtracted from measurement map) for M1 and M2 over the pupil area (7.7 mm). Bottom row: Corresponding measured 1D azimuthally averaged radial profile (blue line) compared to specification (black line) for M1 (left) and M2 (right).