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THE ELECTRON LENS
THE ELECTRON MICROSCOPE
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accelerating voltage amplitude analyser angle asymptotic atomic number beam of electrons Boersch cathode-ray tube Cavendish Laboratory chromatic aberration coils components condenser conjugate contrast coordinate corresponding crystal curves deflected denotes diffraction diffraction pattern effect electron beam electron gun electron lenses electron optics electrostatic lens embedding energy filament final image fluorescent screen focal length Fourier transform frequency function illumination image plane incident electron instrument intermediate lens Laboratory lattice light limit of resolution magnetic field magnetic lenses magnification micro microanalyser micrograph microtomy normally object plane objective aperture objective lens obtained paraxial pass phase Plate pole-pieces potential principal plane probe probe-forming produced projector properties quadrupole rays rotational scanning electron microscope scanning microscope scattering secondary electron Siemens specimen spectrum spherical aberration spherical aberration coefficient stigmator structure superconducting surface thick thin tion trajectory equations transmission electron microscope wave wavelength wehnelt Wien filter X-ray zero