Instrumentation for the simultaneous acquisition of three monochromatic interference patterns for the measurement of head/tape spacing in magnetic tape drives is described. An algorithm to process the three images using a weighted average method into a map of the head/tape spacing and an estimated contact pressure map is presented. Both experimental evidence and Monte-Carlo simulation indicate that the three-wavelength technique is an improvement over standard monochromatic techniques. Sample one- and two-dimensional measurements are given.
Issue Section:
Research Papers
1.
Baugh
E.
Talke
F. E.
1994
, “Biquadratic Surface Fits for Two-dimensional Interferometric Head/Tape Spacing
,” IEEE Trans. Mag.
, Vol. 30
, No. 6
, pp. 4188
–4190
.2.
Greenwood, J. A., and Williamson, J. B. P., 1966, “Contact of Nominally Flat Surfaces,” Proc. Roy. Soc. Lond., Series A 295, pp. 300-319.
3.
Lacey
C.
Talke
F. E.
1992
, “Measurement and Simulation of Partial Contact at the Head/Tape Interface
,” ASME JOURNAL OF TRIBOLOGY
, Vol. 114
, pp. 646
–652
.4.
Lacey
C.
Shelor
R.
Cormier
A.
Talke
F. E.
1993
, “Interferometric Measurement of Disk/Slider Spacing—The Effect of Phase Shift on Reflection
,” IEEE Trans. Mag.
, Vol. 29
, No. 6
, pp. 3906
–3908
.5.
Mizukawa
M.
Hosaka
H.
Hara
S.
1985
, “Study on Spherical Foil Bearing
,” Bulletin JSME
, Vol. 28
, No. 243
, pp. 2105
–2111
.6.
Wahl
M. H.
Casmer
S.
Talke
F. E.
1995
, “Multi-Wavelength Intensity Based Interferometry for Flexible Head/Medium Interfaces
,” Tribology Transaction
, Vol. 38
, No. 3
, pp. 533
–540
.7.
Wu
Y.
Talke
F. E.
1996
, “The Effect of Tape Surface Roughness on the Head-Tape Interface
,” ASME JOURNAL OF TRIBOLOGY
, Vol. 118
, pp. 376
–381
.
This content is only available via PDF.
Copyright © 1998
by The American Society of Mechanical Engineers
You do not currently have access to this content.
