Patent ID: 6704268
Filing Date: 2004-03-09
Classification: G11B

Abstract:
An optical storage device capable of at least reading information recorded on an optical storage medium, comprising:a carriage reciprocatable in a first given direction; a light source; a first lens fixed to said carriage for focusing a light beam emitted from said light source onto said optical storage medium; a second lens interposed between said first lens and said light source for focusing said light beam onto said optical storage medium in cooperation with said first lens; a beam splitter for reflecting at least a part of said light beam transmitted through said second lens in a direction perpendicular to said optical storage medium; and an actuator for supporting said second lens so that said second lens is movable in a second given direction and a third given direction; said actuator comprising: an actuator base mounted on said carriage; a lens holder for holding said second lens so that an optical axis of said second lens extends in a direction substantially parallel to said optical storage medium; supporting means for movably supporting said lens holder to said actuator base; and driving means for moving said second lens in said second given direction, wherein said second given direction is the same as said first given direction, and said second lens is moveable in said second given direction to perform focusing of a beam spot formed on said optical storage medium in cooperation with said first lens, and wherein said third given direction is a rotational direction about an axis substantially perpendicular to said first given direction and substantially parallel to said optical storage medium, and said second lens is rotatable about said axis to perform tracking of a beam spot formed on said optical storage medium.