The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 1997
Filed:
Jan. 29, 1996
Yasushi Sogabe, Osaka, JP;
Shigeki Murata, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A track width error inspector apparatus for examining a width error of recording tracks of a magnetic tape, in which a signal of a given frequency range is recorded on alternate tracks with a plurality of magnetic heads and magnetic powder is applied to the tape and light is radiated thereon and a reflection of the light therefrom is detected, includes: a movable table on which the tape is disposed; an image pick-up for producing an image of the recording tracks; a memory for storing image data from the image pickup; a frequency spectrum detector for detecting frequency components of a frequency spectrum produced by a Fourier transformation of the image data; a ratio calculator for calculating a ratio between one odd-numbered order frequency component and one even-numbered order frequency component; and a track width error calculator for calculating the width error of the recording tracks from the calculated ratio.