Optical recording medium and tracking method therefor

Details Optical recording medium and tracking method therefor Optical recording medium and tracking method therefor

1990-03-22

1991-06-25

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4427, 369 4441, G11B 700

Patent

active

050273370

ABSTRACT:
An optical recording medium has a data storage section including data tracks and tracking lines formed in the data storage section for reading or writing data. The optical recording medium includes an elongated recording region defined between each two adjacent tracking lines, each of the data recording regions having at least one data track disposed offset from the center of the data recording region. The tracking method for the medium includes establishing a first optical detection region on the medium for detecting the tracking line position relative to the detection region and establishing a second optical detection region on the medium for reading or writing which is positioned in a fixed relationship to the first optical detection region. The first and second optical detection regions are positioned with respect to each other so that when the first optical detection region is tracking the tracking line, the second optical detection region is positioned for reading or writing along the data track at a position laterally offset from the center of the data recording region.

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