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<i>n</i>-Beam lattice images. V. The use of the charge-density approximation in the interpretation of lattice images
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1975
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EngineeringLattice ImagesMicroscopyElectron DiffractionBeam OpticElectron MicroscopyCharge-density ApproximationExtended-charge-density ApproximationsComputational ImagingComputational ElectromagneticsRadiologyHealth SciencesReconstruction TechniquePhysicsMedical ImagingAtomic PhysicsObjective-lens Spherical AberrationSynchrotron RadiationRadiographic ImagingGeometrical OpticApplied PhysicsBiomedical ImagingFinite ApertureGeometrical AberrationBeam Transport System
The simple infinite-aperture charge-density approximation to lattice imaging is extended to include the effects of finite aperture and objective-lens spherical aberration. Images computed using these approximations are compared with images computed by the accurate N-beam technique and with experiment in order to establish the bounds of applicability of the extended-charge-density approximations.