摘要:
A magneto-optical head including a lens forming a light spot on a storage disk, a magnetic field generating coil arranged between the lens and the disk to surround the optical center of the lens, and an annular heat sink arranged around the coil. The distance between the outer circumference of the coil and the inner circumference of the heat sink is 70–100 μm.
摘要:
A magneto-optical head including a lens forming a light spot on a storage disk, a magnetic field generating coil arranged between the lens and the disk to surround the optical center of the lens, and an annular heat sink arranged around the coil. The distance between the outer circumference of the coil and the inner circumference of the heat sink is 70-100 μm.
摘要:
An optical head unit used for an optical disk apparatus is provided. The optical head unit includes an object glass assembly for focusing a laser beam from a light source on an optical disk, an actuator movable at least in a focus control direction, a carriage for supporting the actuator and moving the actuator in a track control direction, and a slider which is attached to the carriage and capable of adjusting its posture in relation to a surface of the optical disk. The object glass assembly is provided with a plurality of lens units. Each lens unit includes at least one lens. One of the plural lens units is supported by the slider.
摘要:
A coil assembly includes a coil arranged around a vertical axis, and a supporting member for carrying the coil. The supporting member is formed with a through hole corresponding to the vertical axis. The coil includes a plurality of coil elements which are connected in parallel.
摘要:
A coil assembly includes a coil arranged around a vertical axis, and a supporting member for carrying the coil. The supporting member is formed with a through hole corresponding to the vertical axis. The coil includes a plurality of coil elements which are connected in parallel.
摘要:
An optical information recording/reproducing apparatus records information on and/or reproduces information from an optical recording medium based on a reflected light beam from the optical recording medium. The apparatus includes a light splitting part having a plurality of light splitting stages which split the reflected light beam from the optical recording medium into a plurality of light beams, and a photodetector unit including a plurality of photodetectors which receive the plurality of light beams from the light splitting part. The photodetector unit includes a plurality of photodetectors which receive light beams used to detect a focal error, at least one photodetector which receives a light beam used to detect a tracking error, and a plurality of photodetectors which receive light beams used to detect magneto-optic information recorded on the optical recording medium.
摘要:
An optical information recording/reproducing apparatus records information on and/or reproduces information from an optical recording medium and detects a focal error based on a reflected light beam from the optical recording medium. The apparatus includes a composite prism which deflects a part of the reflected light beam to at least two positions excluding a central part of the reflected light beam, and a photodetector device having a plurality of photodetectors which respectively detect the deflected parts of the reflected light beam and output detection outputs. The focal error is detected based on the detection outputs of the photodetector device.
摘要:
An optical information recording/reproducing apparatus records information on and/or reproduces information from an optical recording medium based on a reflected light beam from the optical recording medium. The apparatus includes a light splitting part having a plurality of light splitting stages which split the reflected light beam from the optical recording medium into a plurality of light beams, and a photodetector unit including a plurality of photodetectors which receive the plurality of light beams from the light splitting part. The photodetector unit includes a plurality of photodetectors which receive light beams used to detect a focal error, at least one photodetector which receives a light beam used to detect a tracking error, and a plurality of photodetectors which receive light beams used to detect magneto-optic information recorded on the optical recording medium.
摘要:
An optical information recording/reproducing apparatus records information on and/or reproduces information from an optical recording medium and detects a focal error based on a reflected light beam from the optical recording medium. The apparatus includes a composite prism which deflects a part of the reflected light beam to at least two positions excluding a central part of the reflected light beam, and a photodetector device having a plurality of photodetectors which respectively detect the deflected parts of the reflected light beam and output detection outputs. The focal error is detected based on the detection outputs of the photodetector device.
摘要:
A floating slider (1) includes an opposing face (11) opposed to a storage medium (Dc). The opposing face (11) has a crown surface (7) like an outer columnar surface having an axis extending radially of the storage medium. The floating slider (1) is floated off the storage medium (Dc) by air flowing in between the storage medium (Dc) and the opposing surface (11). In the floating slider (1), the following expression is satisfied where d represents a crown thickness defined as a distance from an vertex of an arc in a section of the crown surface (7) to a chord of the arc, and L represents a slider length defined as a length of the opposing face parallel to the chord: 250(nm/mm)×L(mm)≦d(nm)≦250(nm/mm)×L(mm)+1500(mm)