Information recording/reproducing apparatus with function of see

Details Information recording/reproducing apparatus with function of see Information recording/reproducing apparatus with function of see

1995-08-15

1997-10-07

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, G11B 700

Patent

active

056755600

ABSTRACT:
An information recording/reproducing apparatus includes an optical system, a moving device for moving a light beam in a direction to cross tracks on a recording medium by moving the optical system, and a tracking error signal detector for detecting a tracking error signal indicating a tracking error of the light beam. In the apparatus, a time interval that the tracking error assumes a predetermined value is detected. A current velocity of the optical system is obtained every time point that the tracking error assumes the predetermined value on the basis of the measured time interval and a moving distance of the optical system corresponding to the time interval. A target velocity value of the optical system is generated at the next occurrence timing of the predetermined value of the tracking error signal upon detection of the current velocity value. An acceleration value of the optical system is generated using the current velocity value and the target velocity value. The moving device is controlled on the basis of the acceleration value.

REFERENCES:
patent: 5121370 (1992-06-01), Yanagi
patent: 5343131 (1994-08-01), Baumann
patent: 5428590 (1995-06-01), Ogino
patent: 5475663 (1995-12-01), Ogino
patent: 5483507 (1996-01-01), Ogino

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