Method of writing servo signal on magnetic tape
First Claim
1. A method of writing servo tracks on tape which comprises irradiating a first 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 a second end of the fiber bundle as an output light source through reducing optics, and irradiating a site of the tape, said site being capable of forming servo tracks, with the laser light transmitted through said reducing optics to form a plurality of servo track patterns in a running direction of the tape at a smaller pitch than the pitch of the optical fibers arrayed in said optical fiber bundle.
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Accused Products
Abstract
A method of writing servo signals on a magnetic tape which comprises irradiating one end of an optical fiber bundle (12) comprising a plurality of optical fibers (11) arrayed in parallel with each other with laser light, transmitting the laser light (24) emitted from the other end as an output light source through a condensing lens (13), 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 (13) to form real images (25) 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 (11) arrayed in the optical fiber bundle (12).
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Citations
18 Claims
- 1. A method of writing servo tracks on tape which comprises irradiating a first 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 a second end of the fiber bundle as an output light source through reducing optics, and irradiating a site of the tape, said site being capable of forming servo tracks, with the laser light transmitted through said reducing optics to form a plurality of servo track patterns in a running direction of the tape at a smaller pitch than the pitch of the optical fibers arrayed in said optical fiber bundle.
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10. An apparatus for writing servo tracks on a tape which comprises a system for running said tape, a system for writing servo signals on said tape, and a light source system providing laser light incident upon said servo signal writing system, wherein:
said servo signal writing system has an optical fiber bundle where a plurality of optical fibers are arrayed in parallel to each other with the center axes of the individual optical fibers being coplanar and reducing optics which receives the laser light emitted from the end of said optical fiber bundle, said optical fiber bundle and said lens being disposed such that the direction in which real images of the output laser light source formed through said lens are aligned and the running direction of said magnetic tape may make an angle larger than 0° and
smaller than 90°
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11. An apparatus for writing servo tracks on a tape which comprises a system for running said tape, a system for writing servo signals on said tape, and a light source system providing laser light incident upon said servo signal writing system, wherein:
said servo signal writing system has a group of two or more optical fiber bundles each having a plurality of optical fibers arrayed in parallel to each other with the center axes of the individual optical fibers being coplanar, said optical fiber bundles being superposed on each other in such a manner that real images may be formed at a smaller pitch than the pitch of real images formed by the individual optical fiber bundles.
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12. An apparatus for writing servo tracks on a tape comprising:
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a system for running said tape in a running direction;
a system for writing servo signals on said tape, the system for writing servo signals including an optical fiber bundle having a plurality of optical fibers arrayed in parallel with each other; and
a light source system for providing laser light incident upon a first end of the fiber bundle, wherein the system for writing servo signals transmits the laser light emitted from a second end of the fiber bundle as an output light source through reducing optics to form servo track patterns on the tape in the running direction at a smaller pitch than the pitch of the optical fibers arrayed in said optical fiber bundle. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification