APP phase addition and corresponding PSF. Left: phase added to the wavefront by the APP. Axes are in units of meters on the DM, where the DM diameter is 0.0105 m. The color scale ranges from –π to π radians. Right: instantaneous PSF produced with a flat incident wavefront and this APP. The wavelength is 532 nm. The axes are in units of λ/D. The image is normalized by dividing by the maximum pixel intensity, and the color scale is in log₁0 units.