Application of hydrodynamics for the study of the stable micro-gap between optical head and optical disk

Abstract

The transverse deflection measurement between a head and a disk varying a lensless head height against Bernoulli base plate under various measurement conditions of dynamic characteristics for the floppy disk are performed. In this experment in order to find a suitable value for both the disk rotation speed and the head hight, both optical method and capacitive method were applied to measure the gap and deflection.