Figure 9:

(a-d) Laser scanning confocal microscope height map from the four locations specified in Fig. 7b for a sample where the final layer had every other pixel illuminated. The underlying layers had all pixels illuminated to serve as a flat background from which the height measurement is reference. The layer height was set to 20 μm. (e-h) Laser scanning confocal microscope height map from the four locations specified in Fig. 7b for a sample where the final layer (and all previous layers) had all pixels illuminated. The layer height was set to 50 μm. The height measurement is referenced to the highest pixels in the map. Both sets of samples were printing using the same correction mask as used in Fig. 5a to give a flattened irradiance map.