Transmission electron microscope An electronic microscope using beams of electrons rather than light to examine a sample TEMs are capable of observing features as small as a few angstroms
Abbreviation for Transverse Electromagnetic Mode, the cross-sectional shape of the working laser beam An infinite number of shapes can be produced, but only a relatively small number are needed for industrial applications In general, the higher the TEM, the coarser the focusing
The transverse electromagnetic mode that is a means of describing the cross sectional shape of a laser beam Typical TEM modes for industrial lasers include a Gaussian shaped beam energy distribution, a bimodal-shaped beam, and a ring shaped distribution
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