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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsNobuo Takeshita, Hideaki Kobachi, Mitsuru Irie, Morihiro Karaki
Estimating the term…
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.
A lens actuating system for an optical read and/or write apparatus that uses a light beam to read information from and/or write information to an optical recording medium, comprising:
A method for reducing the deformation of an optical recording medium while said optical recording medium is being read from and/or written to by a lens actuating system that includes a frame, a lens assembly having an objective lens for focussing a light beam onto said recording medium, a first actuator coupled to said frame and said lens assembly, a driven mass, and a second actuator coupled to said driven mass and said frame, said method comprising the steps of:
A lens actuating system for an optical read and/or write apparatus that uses two light beams to read information from and/or write information to two optical recording mediums, comprising:
Dependencies are inferred from the claim text.