A document sorter has a pair of laterally spaced apart side support beams. The measurement method further comprises projecting a longitudinal grid of elongated foci through the volume of an object; imaging returned light from the object at a different angle on at least one camera, so as to avoid overlapping the elongated images; and analyzing the imaged, returned light to yield depth information of the object at a multiplicity of points. The prism part has an exit for the shaped web and extends from the shaping edge to the exit. It automatically positions itself with respect to predefined entry points and targets in a preoperative CTMRI image following an anatomical registration with an intraoperative 3D surface scan of the patient facial features and a registration jig. In a time-synchronized system, the first interval overlaps with the first interval in at least some neighboring cells and the second interval overlaps with the second interval in at least some neighboring cells. The illumination system comprises a reflector having a reflector contour, the light sources being accommodated in the vicinity of the reflector contour, and a compact diffusing medium accommodated at the focal point of the reflector.