Abstract

A new method to measure the flying height of head sliders in magnetic disk devices was developed. The interference color fringe created in the clearance between the slider and the glass disk was characterized by using the color image processing technique. The relation between hue and the flying height was obtained within 0.0073μm accuracy. The presented method makes use of the phase difference among RGB signals, so it doesn't depend on the light intensity distribution in the TV field, which comes from the optical devices. In addition, the present method gives continuous flying height attitudes.

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