US 7,929,385 B2 · Optical pickup apparatus

Abstract

An optical pickup apparatus for recording and/or reproducing information onto/or from information recording surface, the optical pickup apparatus comprises a laser light source, an objective lens for converging light beams from the laser light source onto the information recording surface through a protective layer of an optical information recording medium, an optical device for changing a divergence angle of incident light beams by moving in an optical axis direction, the optical device being arranged between the laser light source and the objective lens, a light receiving device for receiving light beams reflected by the information recording surface and passed through the objective lens, and a driving device capable of moving the optical device in a direction crossing the optical axis.

Claims18

Dependent claims

An optical pickup apparatus for at least one of recording information onto an information recording surface and reproducing information from the information recording surface, the optical pickup apparatus comprising:

a laser light source;
an objective lens configured to converge light beams from the laser light source onto the information recording surface through a protective layer of an optical information recording medium;
an optical device configured to converge a divergence angle of incident light beams by moving in an optical axis direction of the optical device, the optical device being arranged between the laser light source and the objective lens;
a light receiving device configured to receive light beams reflected by the information recording surface and passed through the objective lens;
and
a driving device configured to move the optical device in a direction crossing the optical axis, the driving device comprising:
a drive source;
a driven member mounted on the drive source;
a movable member holding the optical device, the movable member being engaged with the driven member to be movable in the direction crossing the optical axis;
and
a guide member engaged with the movable member, the guide member being configured to guide the movable member in the direction crossing the optical axis.

8 more elements

A lens moving apparatus for moving an optical device of an optical pickup apparatus for at least one of recording information onto an information recording surface and reproducing information from the information recording surface, the optical pickup apparatus including

a laser light source and
an objective lens configured to converge light beams from the laser light source onto the information recording surface through a protective layer of an optical information recording medium, the optical device being arranged between the laser light source and the objective lens;
the lens moving apparatus comprising:
a first driving device configured to move the optical device in a first direction;
and
a second driving device configured to move the optical device in a second direction across the first direction wherein the optical device is held by a lens holder;
and
wherein the lens holder includes a first lens holder and a second lens holder, the first lens holder being moved by the first driving device in the first direction and the second lens holder being moved by the second driving device in the second direction against the first lens holder.

5 more elements

Dependencies are inferred from the claim text.

Optical pickup apparatus

Life of this patent

Optical pickup apparatus

Life of this patent

Abstract

Claims18