Title :
Interferometric measurement of head/tape spacing in a high-speed R-DAT helical recorder
Author :
Lacey, C.A. ; Talke, Frank E.
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, CA, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
Head/tape spacing in a high-speed R-DAT helical recorder was interferometrically measured using a replica head made of fiber-optic material. For the head tested, observation of white light fringes indicates that the region where head/tape spacing is less than 100 nm changes significantly as a function of tape tension in the range of 0.05 to 0.15 N. However, the small spacing region was not significantly affected by changes in scanner speed in the range from 2000 to 100000 RPM
Keywords :
digital audio tape; magnetic heads; magnetic tape storage; fiber-optic material; head/tape spacing; high-speed R-DAT helical recorder; replica head; scanner speed; tape tension; white light fringes; Equations; Magnetic heads; Magnetic materials; Magnetic recording; Optical fibers; Optical interferometry; Optical materials; Optical surface waves; Phase shifting interferometry; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
