For about the same cost as optical microscopes, tabletop SEMs provide magnification ranges from 10× to 30,000×, depending on the model. For some units, digital zoom capabilities can increase magnification even more. Resolution is from 20nm to 30nm.
“Depth of focus is a major advantage of tabletop SEMs over optical microscopes,” said Michael Wolfe, technical sales specialist and team leader for the NeoScope tabletop SEM from Nikon Instruments Inc., Melville, N.Y. “At high magnifications on an optical microscope, only a small plane of the sample can be in focus at one time. But the tabletop SEM allows the user to visualize an entire object, in focus, at high magnification.”
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