Michael A. O'Keefe (born 8 September 1942, in East Melbourne, Australia) is a physicist who has worked in materials science and electron microscopy.
[6][7] O'Keefe's tutorial on theory and application of high-resolution electron microscope image simulation is available online.
O'Keefe designed and developed the one-Ångström microscope (OÅM) for the National Center for Electron Microscopy at Lawrence Berkeley National Laboratory based on an FEI Company CM300 microscope that he modified extensively to improve coherence and correct three-fold astigmatism.
He was successful in breaking the "one-Ångström barrier" to resolution using his combination of hardware and software correction of microscope aberrations.
[16] Building on his work designing and operating his one-Ångström microscope (OÅM), O'Keefe produced the design for the LBNL TEAM (transmission electron aspheric microscope) able to resolve atoms in the deep sub-Ångström resolution region (less than 0.5 Å) using a hardware electron-wave phase-corrector (Cs corrector) in combination with a coherence-enhancing electron-beam monochromator.