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7626894 |
Heat assisted magnetic recording light delivery with fixed laser and rotating mirror
An apparatus comprises a moveable arm for positioning an optical transducer adjacent to a storage medium, a stationary light source, and a moveable mirror mounted at a pivot axis of the arm for...
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7525880 |
Near-field information reproducing apparatus and near-field information reproducing method
An information reproducing apparatus has a light source for generating linearly polarized light, a medium having linear marks disposed in overlapping relation to one another, and an optical head...
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7492673 |
Optically assisted magnetic recording device with semiconductor laser, optically assisted magnetic recording head and magnetic disk device
The present invention provides a magnetooptic device, a magnetooptic head, and a magnetic disk drive each capable of performing optically assisted magnetic recording and each having a small size,...
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7483229 |
Optical coupling to data recording transducer
In a recording transducer, radiant energy is incident to be coupled to a recording head via a path defined in the support (e.g., slider) for the head. The radiant energy may be directed via a fiber...
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7463401 |
Integrated micro-optical systems
An integrated micro-optical system includes at least two wafers with at least two optical elements provided on respective surfaces of the at least two wafers, at least one of the two optical...
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7444054 |
Apparatus for focusing plasmon waves
An apparatus comprises a thin film metallic layer, a first dielectric layer arranged on a first side of said thin film metallic layer and having a first index of refraction, a second dielectric...
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7440660 |
Transducer for heat assisted magnetic recording
An apparatus includes a first waveguide configured to focus an electromagnetic wave to a focal region, and a second waveguide defining an opening having an end positioned adjacent to the focal...
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7412143 |
Heat assisted magnetic recording with heat profile shaping
A transducer comprises a conductive pin and a waveguide for directing electromagnetic radiation onto the pin, wherein the pin is configured to create a rectangular flat top field distribution at a...
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RE40371 |
Optical disc recording/reproduction apparatus and method
An optical disc recording/reproduction apparatus for recording and/or reproducing a data by applying a beam from an optical head unit through a substrate onto/from a recording layer of the optical...
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7330404 |
Near-field optical transducers for thermal assisted magnetic and optical data storage
An optical transducer comprises an optical element for directing an electromagnetic wave to a focal region and a metallic nano-structure having a longitudinal axis substantially parallel to an...
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7154820 |
Optical element for enhanced transmission of light and suppressed increase in temperature
An optical element structure allowing an increased power density of aperture-transmitted light while suppressing increase in temperature is disclosed. A conductive film has a sub-wavelength...
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7106935 |
Apparatus for focusing plasmon waves
An apparatus for focusing plasmon waves to a spot. The plasmon waves are there converted to light. In one application, the light is used for heat induced magnetic recording. In another application,...
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7006426 |
Integrated optical unit for use with miniature optical discs
Light from a laser diode is directed by mirrors on angled surfaces of an optical unit through a first lens at an optical disc. Light returns from the disc on a parallel path through a second lens...
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6999384 |
Device with waveguide defined by dielectric in aperture of cross-track portion of electrical conductor for writing data to a recording medium
A device for writing data to a recording medium and a method for fabricating the device is presented. According to one embodiment, the device includes an electrical conductor having a cross-track...
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6996043 |
Optical head apparatus
Preceding to the reading out of the recording information of the optical disk by the pick-up, the height of the foreign material existing at the light converging position on the information reading...
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6958956 |
Magneto-optical reading device for multi-track magnetic tapes
The disclosure relates to a magneto-optical reading device for multi-track magnetic tapes, including a flat large incident beam directed onto the active part of a magneto-optical read head and...
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6873576 |
Method of thermally-assisted data recording and a recording apparatus
A method for thermally-assisted magnetic recording at an areal density above 100 Gb/in2 combines thermo-magnetic writing and optical or magnetic reading. In order to increase the stability of the...
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6834027 |
Surface plasmon-enhanced read/write heads for optical data storage media
A read/write head for an optical storage medium is provided. The read/write head comprises a waveguide having an end face and a plasmon-enhanced device provided on the end face of the waveguide....
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6819637 |
Magneto-optical apparatus and optical head
A magneto-optical disk drive that prevents the track shift signal from overlapping the MO signal, even when the optical head projects a divergent spherical wave onto the beam splitter. This...
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RE38648 |
Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston prism
A light source for generating light beams, a diffraction grating for splitting the light beam emitted from the light source into at least three light beams, and an objective lens for receiving the...
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6795630 |
Apparatus and method for producing a small spot of optical energy
An apparatus for producing a small spot of optical energy comprises a planar waveguide shaped to direct a linearly polarized electromagnetic wave to a focal point within the waveguide, and a...
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6781927 |
Data storage system having an optical processing flying head
An optical data storage and retrieval system uses a flying head. The flying head is supported on a moving media having information stored in a plurality of stored data locations thereon....
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6762978 |
Optical head slider, method for manufacturing optical head slider, and recording and/or reproducing apparatus
Recording/reproducing information signals to/from a recording medium appropriately even though the clearance from the signal recording surface of the recording medium to an optical head slider...
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6757221 |
Optical head having object lens and patterned coil
An optical head includes a lens carrier movable at least radially of a magneto-optical disk in facing relation thereto. An object lens is mounted on the lens carrier to converge a laser beam for...
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6717893 |
Laser thermal management system
An optical pickup assembly includes an optical pickup unit (OPU), a thermally conductive plate, and a flex circuit. The flex circuit is mounted atop the plate. The OPU is also mounted atop the...
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6690624 |
Magnetic lens, magnetic reproducing element, reproducing apparatus and reproducing method
A magnetic lens has a reproducing layer and a magnetic slit. When the leak magnetic field Hlk of a recording magnetic domain on a recording disk exceeds the coercive force He of the magnetic slit,...
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6657927 |
Optical head and apparatus provided therewith
An optical head comprises a laser light source, detectors, a reflecting mirror, a magnetic coil, and a driving circuit which are formed in a monolithic manner on a surface of a substrate. A...
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6580667 |
Magneto-optical reproducing head having a plural transfer facing surfaces and insulation gaps
An information reproducing element formed by a plurality of transferring portions sandwiching magnetically insulatable regions is arranged so as to face an information recording medium. A plurality...
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6522618 |
Integrated optical apparatus and associated methods
An integrated optical apparatus includes an optically transparent substrate with a light source and a detector mounted adjacent thereto. The substrate includes an optical element in a transmit path...
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6341102 |
Data writing/reading apparatus
A data handling apparatus is provided which includes a rotatable disk provided with at least an innermost track and an outermost track for storing data, and a disk cartridge for housing the disk....
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6278666 |
Magneto-optical disk recording and reproducing device
In the magneto-optical disk recording and reproducing device, a coil 26a, which serves as a magnetomotive force source is located in the peripheral region of the object lens 5a. A yoke 27a that is...
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6226233 |
Magneto-optical system utilizing MSR media
A system for maximum magneto-optical data storage system is provided. The system utilizes double-sided first surface magnetically-induced super resolution storage media to provide the ability to...
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6181485 |
High numerical aperture optical focusing device for use in data storage systems
A near-field optical or magneto-optical data storage system uses an optical focusing device for focusing an incident optical beam to a small size focal spot. The optical focusing device includes an...
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6178150 |
Offset optics for use with optical heads
An optical head is provided for transmission of light between a source of light and a storage location along an optical path that includes at least one offset optical element.
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6160768 |
Floating optical pickup and information recording and reproducing apparatus including the same
An optical pickup (11) is provided with: a light source (2) for emitting a light beam (B); an objective lens (6) for condensing the emitted light beam onto an information record medium (1), which...
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6151192 |
Magneto-optic multitrack reading head with a kerr effect layer
A magneto-optic multitrack reading head which features a structure with plane layers deposited in a course of a same deposition procedure. These layers include a magnetic layer exhibiting a Kerr...
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6091694 |
Solid immersion lens with semiconductor material to achieve high refractive index
An immersion system for a magneto-optical storage device has a spherical-segment-shaped lens. The lens is formed of material that is transparent to the electromagnetic radiation of the wavelength...
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6064632 |
Recording/reproducing apparatus and a magneto-optical recording medium for use therewith
A recording/reproducing apparatus for use with a photomagnetic recording medium. The apparatus comprises a magnetic coil and an optical system having a numerical aperture (NA) greater than 0.8 and...
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6061323 |
Data storage system having an improved surface micro-machined mirror
A data storage and retrieval system includes a micro machined mirror assembly (μMM) having a plate layer defining a surface micro machined mirror supported at a central axis by two opposed...
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6052340 |
Turntable for optical recording disc recording apparatus
An optical mother disc recording apparatus is disclosed, which can effectively solve problems including a decrease in film thickness and the like and can be miniaturized. The optical mother disc...
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6034938 |
Data storage system having an optical processing flying head
An optical data storage and retrieval system uses a flying head. The flying head is supported on a moving media having information stored in a plurality of stored data locations thereon....
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5978320 |
Recording/reproducing apparatus for use with a photomagnetic recording medium
A recording/reproducing apparatus for use with a photomagnetic recording medium. The apparatus comprises a magnetic coil and an optical system having a numerical aperture (NA) greater than 0.8 and...
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5920538 |
Magneto-optical readout method and magneto-optical readout head and method for making same
A magneto-optical readout head for reading out magnetically stored data has a high optical quality substrate and a transducer applied to the substrate formed by a Faraday rotator and a Kerr...
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5912872 |
Integrated optical apparatus providing separated beams on a detector and associated methods
An integrated optical apparatus includes an optically transparent substrate with a light source and a detector mounted adjacent thereto. The substrate includes an optical element in a transmit path...
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5875155 |
Optical disk unit having reduced recording and reproducing errors
An optical disk presents unit an object lens from being affected by an external disturbance caused by a reversed moving direction of an optical head when information is recorded or reproduced to or...
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5852595 |
Device for initializing an optical disc
A device capable of initializing an optical disc in high-speed and accurate manner includes a moving table (106) movable in the radius direction of a optical disc (101) to which first and second...
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5841612 |
Sliding type magnetic head for magneto-optical recording
A magnetic head for magneto-optical recording comprises a head body (32) having a sliding portion (37) which causes a head element to come in sliding contact with a magneto-optical disc (1). The...
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5822281 |
Disk apparatus and disk access method employing counterelectromotive voltage from second voice coil motor to control first voice coil motor
A disk apparatus according to the present invention includes a rotating means for rotating a disk, a head for accessing the disk, and a head moving means of moving the head in the radius direction...
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5805744 |
Magneto-optical pickup device having phase compensating circuitry
Even when manufacturing of a waveguide is fluctuated and an optical parameter is fluctuated or a wavelength of emitted light is fluctuated, a phase difference between two intrinsic modes can be...
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5748572 |
Magneto-optical recording apparatus with an optical element providing a high C/N ratio
An optical element for a magneto-optical recording apparatus which has a light receiving face on which light is incided, this light being reflected or transmitted on or through a magneto-optical...
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