Abstract: An optical pickup apparatus comprising: a housing configured to include an optical component including a laser diode emitting a laser beam, the housing being made of metal; and a heatsink configured to dissipate heat generated from the laser diode, the heatsink being made of metal different from the metal of the housing; the heatsink being fixed to the housing with one screw and adhesive.

Abstract: An optical-pickup apparatus includes first and second objective lenses that focus first and second laser light on information-recording layers of first and second optical discs, the second optical disc having an information-recording format different from that of the first optical disc; and a lens holder that integrally holds the first and second objective lenses in an adjacent manner, a disc surface of the first optical disc and of the second optical disc being substantially parallel to confronting faces of the first and second objective lenses, that confront the disc surface, a minimum distance between the disc surface and the confronting faces in a direction of an optical axis of the turntable being greater than a thickness of the turntable in a direction of a rotation axis of the turntable, either one or both of the first and second objective lenses configured to focus bluish-violet laser light on an optical disc.

Abstract: An optical pickup apparatus including a first objective lens that focuses first laser light on an information recording layer of a first optical disc in a first mounting state where the first optical disc is mounted on a turntable; a second objective lens that focuses second laser light on an information recording layer of a second optical disc in a second mounting state where the second optical disc is mounted on the turntable, the second optical disc having an information recording format different from that of the first optical disc; and a lens holder that integrally holds the first objective lens and the second objective lens in an adjacent manner on the outside and inside, respectively, along a radial direction of the first optical disc in the first mounting state and of the second optical disc in the second mounting state.

Abstract: An objective lens actuator is provided which includes two objective lenses mounted on a movable body, and which is capable of preventing the movable body from coming into contact or collision with a disk and whose thickness becomes thinner. When a light beam is concentrated and focused on a high-density optical disk, D1 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a CD, D2 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a DVD, D3 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; and the following relational expression (1) is satisfied, D1<D2<D3??(1).

Abstract: An optical disk drive is provided with an optical pickup and an optical sensor. The optical pickup is used for reading main information from an optical disk. The optical sensor is located in the range of R17 to R23 and used for reading sub information from the optical disk. The optical sensor is provided in relation to the center of a spindle motor used for rotating the optical disk and is located within 120° with respect to the radius that is 180° opposite to the radius along which the optical pickup is movable.

Abstract: An optical disc apparatus according to the present invention is equipped with a disc rotation mechanism for placing and rotating a disc, a plurality of optical heads for emitting light beams for recording and/or reproducing data on the optical disc, a transport unit including a guide structure for guiding the optical heads to be radially transportable on the disc, an optical head transport mechanism for transporting the optical heads along the guide structure, and a transport base for supporting the disc rotation mechanism, the guide structure and the optical head transport mechanism, an optical head storing portion having a plurality of storage support guides for supporting and storing each of the plurality of optical heads, and an optical head insertion and removal mechanism for transporting each of the optical heads from the optical head storing portion to the transport unit or from the transport unit to the optical head storing portion, and each optical head stored in the optical head storing portion is t

Abstract: An actuator for an optical pickup having a base on which a holder is fixed, a bobbin, a support member, and a magnetic circuit. A plurality of installation holes are formed in the bobbin such that a plurality of objective lenses to record and/or reproduce optical discs having different recording densities are installed at different heights. The support member has one end coupled to the bobbin and the other end coupled to the holder movably supports the bobbin. The magnetic circuit drives the bobbin in focusing and tracking directions. The magnetic circuit is divided into a first magnetic circuit to drive the objective lenses in the focusing direction, and a second magnetic circuit to drive the objective lenses in the tracking direction, thereby reducing the weight of a moving portion.