Patent ID: 6741543
Filing Date: 2004-05-25
Classification: G11B

Abstract:
A lens driving apparatus comprisinga lens holder supported movably in directions of focus and tracking, focus drive coils and tracking drive coils, mounted to said lens holder, and a magnetic flux imparting component for imparting a magnetic flux to said focus drive coils and tracking drive coils, wherein said focus drive coils and tracking drive coils respectively include a pair of plane coils formed in a plane perpendicular to a direction of jitter and each having a coil axis parallel to the direction of jitter substantially perpendicular to said directions of focus and tracking, said magnetic flux imparting component imparts magnetic fluxes in directions opposite to each other along said direction of jitter to two areas of said plane coils divided by each of boundary lines between magnetic poles which are inclined relative to said directions of both focus and tracking, and said boundary lines are arranged symmetrically with respect to a plane parallel to the direction of jitter and including an optical axis, and wherein one of said pair of plane coils constituting said focus drive coils and a corresponding one of said pair of plane coils constituting said tracking drive coils are arranged one on the other along said direction of jitter.