Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1994-09-26
1995-12-26
Epps, Georgia Y.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4432, 369247, 369251, G11B 700
Patent
active
054793866
ABSTRACT:
A lens actuating system for an optical disk drive has an objective lens movably mounted in a movable frame with orthogonal X-, Y-, and Z-axes. A seeking servo moves the frame in the X-direction. A tracking servo moves the objective lens in the X-direction. A focusing servo moves the objective lens in the Z-direction. An optoelectronic sensor detects the relative position of the objective lens and frame in the X-direction, so that the tracking servo can maintain a fixed relative position during track-seeking, or in the Z-direction, to establish a neutral point on the Z-axis for the focusing servo. Force applied by the focusing servo or tracking servo to move the objective lens in one direction can be opposed by an equal and opposite force applied to a driven mass, so that a net zero force is transmitted to the frame.
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International Symposium on Optical Memory 1991, Oct. 1-4, 1991, Sapporo, Japan, Technical Digest.
Irie Mitsuru
Karaki Morihiro
Kobachi Hideaki
Takeshita Nobuo
Epps Georgia Y.
Hindi Nabil
Mitsubishi Denki & Kabushiki Kaisha
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