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camera constant

camera constant

The product of the camera length and the wavelength of the incident electron is called "camera constant." The camera constant is equal to the product of the distance from the central spot produced by a transmitted wave to a certain diffraction spot and the lattice spacing corresponding to the diffraction spot. Thus, if the camera constant is calculated using a standard specimen whose lattice spacing is known, measuring the distance from the transmission spot to a certain diffraction spot makes it possible to calculate the lattice spacing of the corresponding diffraction spot.

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