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:
Aug. 15, 2006
Filed:
May. 07, 2002
Masayuki Fujita, Tokyo, JP;
Masayuki Fujita, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A lens actuator keeps an objective lens focused on a track in an information recording layer of an optical disc against fluctuation unavoidable for the optical disc, and has a lens holder, three electromagnetic actuators for moving and tilting the lens holder and three pairs of elastically deformable conductive connecting rods connected to both side surfaces of the lens holder for movably retaining the lens holder over a base plate; since two pairs of elastically deformable conductive connecting rods are symmetrically arranged on upper and lower sides of the remaining pair, the lens holder is smoothly tilted and moved in the radial direction of the optical disc without any tilt, whereby the lens actuator promptly and exactly cancels the fluctuation of the optical disc.