Abstract:
A magneto-optic head device (1) comprising a suspension (12) fixed at one end thereof to the bottom surface of an arm (11), a slider (13) fixed to the free end of the suspension, and magnetic field modulation coil (14) and an object lens (15) mounted on the slider. The slider is levitated by a wind pressure caused by the rotation of an MO disk (3). The magneto-optic head device further comprises a collimator lens (21) provided between a light source (71) in a hybrid optical device (7) provided on the arm and the object lens to permit the position of the collimator lens to be able to be vertically adjusted along the optical axis by a collimator/actuator (23) and hence to improve optical conditions between the light source and the object lens.
Abstract:
A method in a disk drive (300) having a permanent magnet (302), a data storage disk, and an actuator assembly (304) coupled to a transducer (308), for spinning down the data storage disk. The actuator assembly is coupled to an actuator motor (310) which is configured, when on, for positioning with a first torque the actuator assembly (304) such that the transducer (308) is disposed over data storage zones of the data storage disk. The method includes moving, using a ferromagnetic structure coupled to the actuator assembly, the actuator assembly to a home position. The home position represents a position of the transducer assembly in which the transducer is disposed over a designated parking area of the data storage. The ferromagnetic structure is configured to be magnetically attracted toward the permanent magnet with a magnetic force which urges the actuator assembly toward the home position with a second torque lower than the first torque. The method further includes holding, using the second torque, the actuator assembly in the home position when the actuator motor is off. Additionally, the method includes applying dynamic braking, using a spindle motor coupled to the data storage disk, to stop the data storage disk from spinning.
Abstract:
The invention relates to a device for deflecting light beams, specially laser beams, comprising at least one deflecting element, preferably a mirror (4), that can be regulated by means of a driving unit. According to the invention, the driving unit (24) is formed by the driving device of a write and read head of a magnetic data storage.
Abstract:
An electro-optical storage system based on air-bearing-suspended optical head in a near-field configuration. The system comprises a read/write head and a head positioning system, an optics module (1702) including beam relay optics and signal detectors (1804), an optical medium (1714) and a corresponding medium driving unit, and an electronic control system. The optical head includes a near-field lens with a high index of refraction and in a near-field regime has a numerical aperture greater than unity when the spacing between an exit facet of the optical head and a recording layer in an optical medium is a fraction of the wavelength.
Abstract:
A system (100) for maximum magneto-optical data storage is provided. The system (100) utilizes double-sided first surface magnetically-induced super resolution storage media (107) to provide the ability to access a data mark from a plurality of data marks within an optical spot size of an impinging optical beam of light (191).
Abstract:
A system and method for generating position error signals within a magneto-optical computer memory device whose track pitch is close to the full width half maximum width of the laser spot, the narrow track being typical of data stored on magnetic super resolution media. The magneto-optical computer memory device comprises a storage media for storing information, position marks embossed on the storage media, a head device coupled to the storage media for sensing the position marks to generate position error signals, and a correction device coupled to the head device to access the position error signals and responsively position the head device to correctly sense the stored information.
Abstract:
An optical data storage, tracking, and retrieval system (100) uses a flying head (106). The flying head (106) is supported over a moving media (107) having information stored in a plurality of stored data locations thereon. Information is stored in each of the plurality of media locations as physical structures capable of modulating the polarization state of incident light into one of two output polarization states. A preferred embodiment includes optical fibers (102, 110, 112) for coupling the incident (191) and return (192, 193) light beams between detectors (235, 236) and the flying head (106). A preferred embodiment includes an optical plate (424) having pre-shaped and dimensioned recesses for automatically locating and aligning multiple optical components. The flying head (106) may also include a servo-controlled micro machined mirror (401) for directing the incident and reflected light beams to and from the media.
Abstract:
A magneto-optical flying head utilizes a steerable mirror (340) in combination with a light source and a lens to write and read data onto a magneto-optical storage disk (180). A beam of laser light transmitted from the light source to the optical head is reflected onto a steerable micro-machined folding mirror (340). The reflected light from the folding mirror (340) is directed through an embedded micro-objective GRIN lens (420). Fine tracking and short seeks to adjacent tracks are performed by rotating the mirror about an axis of rotation. In this way a focus spot is scanned back and forth in a direction which is approximately parallel to the radial direction of the storage disk.