Title :
Real-time tracking of the head-disk separation using laser heterodyne interferometry. I. Instrumentation
Author :
Veillard, Dominique H. ; Ganapathi, S.K. ; Smith, Paul W.
Author_Institution :
Lafouda Solutions, San Diego, CA, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
The design aspects of an optoelectronic probe that produces a real-time, DC coupled readout of the out-of-plane component of a flying head position relative to the disk are presented. The prototype implementation achieves nanometer resolution in a 50-kHz bandwidth
Keywords :
light interferometry; magnetic disc storage; measurement by laser beam; position measurement; probes; 50 kHz; DC coupled readout; flying head position; head-disk separation; laser heterodyne interferometry; nanometer resolution; optoelectronic probe; out-of-plane component; real-time tracking; Apertures; Arm; Frequency; Instruments; Optical distortion; Optical fibers; Optical interferometry; Optical mixing; Optical refraction; Optical sensors;
Journal_Title :
Magnetics, IEEE Transactions on
