Abstract
The contribution of inelastic scattering to off-axis electron holograms is considered. For a sample which introduces a single sharp energy loss δ E, we find that this loss contributes time-independent interference fringes to the hologram provided δ E < Δ E, where Δ E is the electron source energy spread. The relevance of this to two-beam lattice imaging at the Bragg condition is outlined, and the relationship between the uncertainty principle, the Van Cittert-Zernike theorem and the phase-space interpretation of coherence and Brightness reviewed.
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