Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1990-08-03
1993-03-30
McElheny, Jr., Donald
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
3692751, 428694, 428900, G11B 724
Patent
active
051990245
ABSTRACT:
An optical data storage medium having a continuous tracking guide strip defining a single spiral recording track, or concentric tracking guide rings defining concentric recording tracks. The tracking guide strip or rings provide(s) tracking servo information which is optically read to position an optical head relative to the data storage medium, for centering a read/write beam on a desired recording track. The tracking guide strip or rings is/are formed of a material which has a higher light absorption coefficient than that of a material of the recording track(s). A method for fabricating the storage medium, and a tracking system for the storage medium are also disclosed.
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Maruyama Hideo
Matsuda Riki
Ohashi Yumiko
Taki Kazunari
Brother Kogyo Kabushiki Kaisha
McElheny Jr. Donald
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