Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1988-04-28
1990-06-05
Richardson, Robert L.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 4411, 360 7806, G11B 7085, G11B 2108
Patent
active
049320130
ABSTRACT:
An apparatus for reading an optical disk having tracks extending tangentially includes a driving device for moving at least one light spot. A signal which indicates a deviation of the light spot from one of the tracks and a second circuit produces acceleration and deceleration signals. The driving device is controlled to accomplish a track jump of the light spot in accordance with the acceleration and deceleration signals. The second circuit produces the acceleration signal when a track jump is to be initiated and produces the deceleration signal when the ratio of the level of the tracking error signal to the peak value of the tracking error signal becomes equal to a predetermined value.
REFERENCES:
patent: 4057832 (1977-11-01), Kappert
patent: 4764860 (1988-08-01), Takao
patent: 4817069 (1989-03-01), Shigemori
Deguchi Toshihisa
Kojima Kunio
Sakamoto Noriaki
Yamane Daiji
Richardson Robert L.
Sharp Kabushiki Kaisha
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