title: The optical diffractometer and the study of biological ultrastructure.
mesh_terms: D003585:Cell Biology / Q000295:instrumentation; D006801:Humans; D007834:Lasers; D008854:Microscopy, Electron / Q000295:instrumentation; D055095:Optics and Photonics / Q000295:instrumentation*; D010336:Pathology / Q000295:instrumentation