Optical recording medium having spiral tracks formed with a turn

Details Optical recording medium having spiral tracks formed with a turn Optical recording medium having spiral tracks formed with a turn

1996-09-17

1997-11-18

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369278, 369279, G11B 724, G11B 370

Patent

active

056894961

ABSTRACT:
An optical recording medium enables an optical pickup to quickly access a plurality of items of information progressing concurrently or to be selected simultaneously. By provision of spiral multitrack formed by multiple winding of a plurality of tracks in a first recording region and concentric-circle track formed in a second recording region adjacent to the first recording region, this invention can implement an optical recording medium in which the distance from the concentric-circle track to each track of the spiral multitrack is shortened, thus enabling an optical pickup to quickly access a desired track at a track jump.

REFERENCES:
patent: 3656760 (1972-04-01), Symmes
patent: 4329575 (1982-05-01), Roach
patent: 4341952 (1982-07-01), John et al.
patent: 4803677 (1989-02-01), Yamaguchi et al.

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