Title :
A glass disk distortion effect in an optical flying height tester
Author :
Fukuzawa, Tadashi ; Hisano, Teiji ; Watabe, Hiroshi
Author_Institution :
Tokyo Res. Lab., IBM Res., Kanagawa, Japan
fDate :
9/1/1996 12:00:00 AM
Abstract :
A flying height tester has been developed for measuring low disk-to-media gap and high disk rotation speeds. The tester can obtain two-dimensional measurement data for a flying head, using an adaptive detection algorithm and signals from a color television camera. A depolarizing unit is used to suppress measurement errors caused by the photoelastic effect of the glass disk at high rotation speeds
Keywords :
height measurement; magnetic disc storage; photoelasticity; adaptive detection algorithm; color television camera signal; depolarizing unit; disk rotation speed; disk-to-media gap; errors; flying head; glass disk distortion; optical flying height tester; photoelastic effect; two-dimensional measurement; Cameras; Detection algorithms; Distortion measurement; Glass; Optical distortion; Rotation measurement; Signal detection; TV; Testing; Velocity measurement;
Journal_Title :
Magnetics, IEEE Transactions on
