Abstract
Non-contact tension measurement of magnetic tape is performed. Light from a focussed light source is directed at a tape surface and the light reflected from the tape is captured by a photo cell. As the tape tension varies, the divergence of the reflected light bundle changes, i.e., the amount of light seen by the photo cell is a measure for the tension in the tape. Using this non-contact tension measurement approach and a high frequency lateral tape motion sensor, we have investigated the correlation between high frequency tension changes and high frequency lateral tape motion. Strong correlation is observed between the absolute values of tension and lateral tape motion.
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