Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Robinson et al. (1984) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: