About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
A glass disk distortion effect in an optical flying height tester
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. © 1996 IEEE.