Optical pickup and optical disc device
AssigneeSony Corporation
InventorsKatsuhiro Seo, Yoshiaki Kato, Yoshiki Okamoto, Takeshi Yonezawa
Life of this patent
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Abstract
An optical pickup includes at least a laser light source emitting a laser beam, a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light, and an objective lens. The laser beam transmitted through the collimator lens system is incident upon the objective lens. The collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.
Claims16
An optical pickup comprising at least:
- a laser light source emitting a laser beam;
- a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light;
- and
- an objective lens, the laser beam transmitted through the collimator lens system being incident upon the objective lens,
- wherein the collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.
An optical disc device performing a recording operation and/or a reproducing operation on an optical disc recording medium, the optical disc device comprising:
- an optical pickup including at least a laser light source emitting a laser beam, a collimator lens system including a plurality of lenses for collimating the light beam emitted from the laser light source and incident thereupon as diffused light, and an objective lens, the laser beam transmitted through the collimator lens system being incident upon the objective lens,
- wherein the collimator lens system includes a first lens unit held so as to be movable in an optical axis direction of the laser beam and a fixed second lens unit.
Dependencies are inferred from the claim text.