Open AO-loop assessment of HD 135344B Ks-band observations. Left panel: maximum counts of the ordinary (red) and extraordinary (blue) beams. The horizontal dashed blue and red lines are the 3σ bounds for the respective beam, indicating which observations have adequate AO corrections. The upper-right panel shows an example of an effective AO correction for the ordinary beam, and the lower-right panel shows the blurred result of an open AO loop.