Optical pickup having a driving unit for moving objective lens
Patent 4643522 Issued on February 17, 1987. Estimated Expiration Date: 
July 30, 2004. 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.
July 30, 2004. 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 ReferencesPickup assembly for disc player Optical device for controlling a light beam Apparatus for driving objective lens Objective lens assembly for optical disc player Objective lens drive device with tracking error correction with flux of opposite direction Patent #: 4507764 InventorAssigneeApplicationNo. 06/635607 filed on 07/30/1984US Classes:359/824, Electromagnetic or piezoelectric drive369/44.15, Elastic, flexible, pliant or spring support of lens or mirror369/44.21Lens or mirror pivots off center (e.g., on a shaft, etc.)ExaminersPrimary: Corbin, John K.Assistant: Ben, Loha Attorney, Agent or FirmInternational ClassG11B 7/09 (20060101)AbstractAn optical pickup has a driving unit for driving a driven member which has an objective lens. The driving unit has an open loop arrangement of a pair of magnets, the same poles of which oppose each other. | |
