The Scanning Electron Microscope-A New Tool in Disc-Recording Research
The scanning electron microscope (SEM) has only recently become generally available as a commercial device. The combination of high resolution and high magnification with a remarkable depth of focus provided by the SEM, together with simple procedures in specimen preparation, make this instrument admirably suited for use in disc-recording research and development. A description of the SEM is given, and photomicrographs of details of recording and playback styli and of new and worn groove walls in records are shown.
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