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Focus servo loop off-set compensation

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focus servo system having object lens protection circuit for an

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focus-servo correction utilizing storage of detected focus error

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focused-spot-position detection device for optical information r

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focusing control circuitry for an optical memory system

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focusing detection apparatus

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focusing error detection apparatus

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focusing optical head movable radially by a carriage

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focusing system for video disc player

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focussing error detection device for use in optical disk type re

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Focussing lens servo driving device for optical information read

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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Frequency modulation to biphase data conversion for writable CD

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
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