Objective lens driving device in an optical pickup
Patent 4998802 Issued on March 12, 1991. Estimated Expiration Date: 
May 25, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 25, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMagnetic objective lens driving apparatus with pivot Objective lens driving device Optical head apparatus for recording and reproducing data on a reording medium Device for driving optical parts of an optical pickup Patent #: 4861138 InventorsAssigneeApplicationNo. 357314 filed on 05/25/1989US Classes:359/814, Electromagnetic motive power369/44.22Lens or mirror floats, (e.g., magnetic field support or lens/mirror can freely float and pivot about its own axis, etc.)ExaminersPrimary: Arnold, Bruce Y.Assistant: Ben, Loha Attorney, Agent or FirmInternational ClassG02B 007/02Foreign Application Priority Data1988-06-03 JPAbstractAn objective lens driving device is disclosed, in which the objective lens is moved in the direction of the optical axis thereof by a thrusting force generated between a magnet for focusing and a driving coil for focusing to effect focusing and it is moved in the direction perpendicular to that of the optical axis thereof by another thrusting force generated between a magnet for tracking and a driving coil for tracking to effect tracking. | |
