Optical information recording-reproducing apparatus including a

Details Optical information recording-reproducing apparatus including a Optical information recording-reproducing apparatus including a

1996-11-18

1997-12-23

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 4438, 369110, G11B 1100, G11B 700

Patent

active

057012792

ABSTRACT:
A minute light spot is irradiated on an information track on a recording surface of a recording medium from an optical head. When reproducing an information mark train recorded on the recording surface by the mark position recording method, light reflected by or transmitted through the recording medium is guided to a divided photosensor having a division line extending in a direction perpendicular to the track. A plurality of outputs from the divided photosensor is arithmetically processed to thereby detect the central position of the information mark.

REFERENCES:
patent: 5105399 (1992-04-01), Shimonou
patent: 5208792 (1993-05-01), Imanaka

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