Quantum Corporation

Shinsuke Okuda

Takashi Ishii

Akira Ishikawa

Mitsuhiro Katashima

Takahisa Yamashiro

Koji Uchida

Masato Hoshi

A magnetic tape comprising a substrate having on one side thereof a magnetic layer serving as a recording surface and on the other side thereof a resin layer serving as a non-recording surface, wherein said magnetic tape has a region on the side of the non-recording surface along the longitudinal direction of the tape in which a regular pattern for servo tracking having different optical properties from the other major region of the side of the non-recording surface is to be formed, and said magnetic tape has a thickness of 7 &#x3bc;m or less.

Magnetic tape

A method of writing servo signals on magnetic tape which comprises making a single laser beam ( ) pass through a diffraction element ( ) to split it into a plurality of beams ( ) traveling in prescribed directions and then making the plurality of beams ( ) pass through an optical convergence system ( ) to form converged beam spots on a site of a magnetic tape ( ) which is capable of forming servo tracks, the magnetic tape ( ) being running at a prescribed speed, to cause the site to change physically or chemically thereby forming a plurality of servo tracks (S) in the longitudinal direction of the tape simultaneously.

Method of writing servo signal on magnetic tape

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 ( ).

Growing community of inventors

Haga-gun, Japan

Shinsuke Okuda