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Applications of interferometric measurements of surface topography of moving magnetic recording materials

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4 Author(s)
Robinson, G. ; 3M Company, 3M Center, Saint Paul, Minnesota, USA. ; Moran, P. ; Peterson, R. ; Englund, C.

A laser scanning interferometer is used to measure surface profiles and quality parameters of moving loops of magnetic tape and rotating diskettes. A spatial resolution of one micrometer and a vertical resolution of one nanometer are obtained. Reproducibility of RMS measurements of asperity height is also within one nanometer.

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Magnetics, IEEE Transactions on  (Volume:20 ,  Issue: 5 )