电子显微镜的基本构造 Cathode(tungsten Electron gun nside Wehnelt First condenser Condenser condenser ens system 俯米 室品料 Pro ector lens 回中 VIewing screen 窗题 Photographic plate Figure A-21 A Transmission Electron Microscope (in camera chamber (a) A photograph and (b) a schematic diagram of a TEM电子显微镜的基本构造