The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2003
Filed:
Sep. 10, 1999
Suguru Takishima, Tokyo, JP;
Pentax Corporation, Tokyo, JP;
Abstract
An optical disc drive is provided with a light source unit that emits a collimated light beam, and a carriage mounting an objective lens for converging the collimated light beam on a recording surface of an optical disc. The carriage is movable in a direction traversing data tracks of the optical disc. The optical disc drive is further provided with a lens actuator mounted on the carriage. The lens actuator has a movable unit capable of moving the objective lens in first and second directions, independently. The first direction is a direction of an optical axis of the objective lens, and the second direction is a direction on a plane parallel to the data recording surface of the optical disc. A magnetic head is mounted on the movable unit of the lens actuator. The magnetic head is capable of applying a magnetic field onto the data recording surface of the optical disc when data is to be recorded on the optical disc. A positional relationship between the objective lens and the magnetic head is substantially constant regardless of the moving amount of the movable unit in the first and second directions.