Displacement measurement of track on magnetic tape by Fourier transform grid method

Yasushi Sogabe; Yoshiharu Morimoto; Shigeki Murata

doi:10.1117/12.57500

1 December 1991 Displacement measurement of track on magnetic tape by Fourier transform grid method

Yasushi Sogabe, Yoshiharu Morimoto, Shigeki Murata

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57500
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The Fourier Transform Moiré and Grid Method(FTMGM) is a method for measuring displacement and strain by using Fourier transform of a grating image. In this paper, we will present a new method and a system to analyze displacement distribution of the track, which are signal recorded by a video cassette recorder(VCR) and a digital audio tape recorder(DAT), by using the FTMGM. Using this method, we can obtain a two-dimensional distribution of the displacement amount from linear state of the track recorded on a magnetic tape. Therefore, by using this track displacement information, it is possible to clarify the timewize variation state of the displacement and to remove the factors of worsening the track linearity. It is available for a high density recording on a magnetic tape.

Citation Download Citation

Yasushi Sogabe, Yoshiharu Morimoto, and Shigeki Murata "Displacement measurement of track on magnetic tape by Fourier transform grid method", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57500

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