In various embodiments, provided are ion optics systems comprising an even number of ion mirrors arranged in pairs such that a trajectory of an ion exiting the ion optics system can be provided that intersects a surface substantially parallel to an image focal surface of the ion optics system at a position that is substantially independent of the kinetic energy the ion had on entering the ion optics system. In various embodiments, provided are ion optics systems comprising an even number of ion mirrors arranged in pairs where the first member and second member of each pair are disposed on opposite sides of a first plane such that the first member of the pair has a position that is substantially mirror-symmetric about the first plane relative to the position of the second member of the pair.