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:
May. 25, 2004
Filed:
Mar. 25, 2002
Shinsuke Okuda, Ichikai-machi, JP;
Takashi Ishii, Yokohama, JP;
Quantum Corporation, San Jose, CA (US);
Abstract
A method of writing servo signals on a magnetic tape which comprises irradiating one end of an optical fiber bundle ( ) comprising a plurality of optical fibers ( ) arrayed in parallel with each other with laser light, transmitting the laser light ( ) emitted from the other end as an output light source through a condensing lens ( ), and irradiating a site of a magnetic tape running at a prescribed speed, the site being capable of forming servo tracks, with the laser light passed through the condensing lens ( ) to form real images ( ) equal to or smaller in size than the output light source to cause the site to change physically or chemically thereby forming a plurality of servo track patterns (S) in the longitudinal direction of the tape at a smaller pitch than the pitch of the optical fibers ( ) arrayed in the optical fiber bundle ( ).