A microelectronics apparatus comprising a substrate, a pair of grid electrodes coupled to the substrate on opposing sides of a central axis, wherein the grid electrodes are substantially parallel to each other and extend substantially perpendicular from the substrate, and a plurality of ion reflection lenses each coupled to the substrate, wherein each ion reflection lens: (1) is substantially perpendicular to each of the grid electrodes; (2) extends substantially perpendicular from the substrate; and (3) has an aperture aligned with the central axis.