File talk:Transmission Electron Microscope operating principle.ogg

Hi,

Nice video, but there are a few issues with it, which might be confusing to new viewers.
 * The beam path doesn't show any magnification, or magnification mechanism. The sample appears 1:1 with the image, and there is no method in the highlighted beam for anything to become larger.
 * In STEM mode, it is the beam that moves whilst imaging, whilst the sample stays still. Mechanical motion is too coarse, and electrostatic deflectors are used. Mechanical motion *is* used to locate a position on the sample for inspection however.
 * In STEM mode, the beam appears to converge, then is shown to somehow be converted to a parallel beam. This cannot happen without a lens.
 * The objective lenses appear to be missing from the sample? There should usually be some form of beam inversion near the sample plane, in order to provide a virtual source for magnification.
 * In EELS analysis, the energy spectrum is continuous after exiting the sample - the prism splits the beam into a continuous spectrum of differing electron energies. A mechanical selection aperature is used, either in-column (omega filter), or post-colum (imaging filter). The current image makes it appear that the spectrum is still a fixed beam (as if you are oscillating the HV energy).

I think, at a minimum some words saying that the animation is simplification, and that some lenses are not shown may have to be given, as the current animation is otherwise highly misleading about the function of a TEM. 129.67.86.87 (talk) 23:16, 1 October 2016 (UTC)