(a) Transfocator CAD-drawing. Pneumatic axes (blue) actuate the insertion of lens pack holders into the beam path and onto a high-precision V-rail for mutual lens pack alignment. Alignment (rotation and translation) of the transfocator is achieved through a Q-Sys motion platform (cyan). (b) Large-beam and (c) small-beam HFM assembly. The mirrors are shown in gray, with the illuminated region in yellow. Dimensions are given in millimetres.