Title :
A new laser interferometer system for investigation of the dynamics at the head/disk interface
Author :
Staudenmann, M. ; Donovan, M.J. ; Bogy, D.B.
Author_Institution :
IBM Corp., San Jose, CA, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
A new interferometer system is described for dynamic measurements at the head/disk interface. Two measurement spots allow the characterization of the spacing variation between slider and disk as well as of the pitch and roll motion of the flying slider. Actual disks and sliders can be used with parallel or non-parallel reflective surfaces. The noise level in a measurement Is less than 2 nm, the bandwidth of the system is DC to 1 MHz
Keywords :
light interferometry; magnetic heads; measurement by laser beam; 1 MHz; dynamic measurements; flying slider; head/disk interface; laser interferometer; noise level; pitch motion; reflective surfaces; roll motion; spacing variation; Frequency; Glass; Laser beams; Magnetic heads; Magnetic levitation; Motion measurement; Optical interferometry; Optical modulation; Transducers; Wavelength measurement;
Journal_Title :
Magnetics, IEEE Transactions on
