Disk Size/Radius in CBED
- Practical Electron Microscopy and Database -
- An Online Book -


This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.


The disk diameter (size) in CBED is related to the convergence angle (α) for forming the patterns. In other words, the diameter (d) of the bright-field disk in Figure 1991 is a function of the α and the wavelength (λ), given by,

       d = 2α/λ ---------------------- [1991]

CBED disk diameter

Figure 1991. CBED disk diameter.



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