Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1984-01-26
1987-09-22
Cardillo, Raymond F.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 44, G11B 7135, G11B 700
Patent
active
046959920
ABSTRACT:
An optical information recording-reproducing apparatus in which a primary beam is applied to a recording medium and information is recorded and reproduced by the same primary beam while, at the same time, at least two secondary beams are applied to the recording medium and the lights of the secondary beams from the recording medium are detected to thereby obtain the position information of the primary beam on the recording medium has a device for varying the relative position of the primary beam and the secondary beams on the recording medium during recording of information and during reproduction of information.
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Canon Kabushiki Kaisha
Cardillo Raymond F.
Weinhardt Robert A.
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