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| Number | Title | Issue Date |
| 8144549 | Head stack assembly and information recording apparatus An information recording apparatus includes a medium for recording information; a head slider including a device for writing the information onto the medium and a reflective surface for reflecting light; a light emitting portion for generating emission light toward ... | 03/27/2012 |
| 8077557 | Multiple aperture VCSEL EAMR heads A magnetic recording device comprises a multi-aperture vertical cavity surface emitting laser (VCSEL) operably coupled to a magnetic recording head and a plurality of waveguides disposed in the magnetic recording head. Each of the plurality of waveguides has a first... | 12/13/2011 |
| 8054713 | Magneto-optical switching device and method for switching a magnetizable medium The invention relates to a magneto-optical switching device for switching magnetization in a medium, comprising a magnetizable medium. According to the invention, a radiation system suited for imparting angular momentum to the magnetic spin system of said magnetizab... | 11/08/2011 |
| 8045839 | Method of controlling the operation of an optical disc recording apparatus, and recording medium on which the control program is recorded On a host computer (300), writing software for controlling recording and image forming operations of an optical disc recording apparatus (10) is installed. When the writing software is activated, the host computer (300) requests the user to inpu... | 10/25/2011 |
| 7986592 | Components and assembly procedure for thermal assisted recording Components for, and assembly of, a thermally assisted recording device involve a laser mounted to a recording head slider. The output from the laser is directed into an optical waveguide, which delivers the laser light to the media to be written. Several challenges ... | 07/26/2011 |
| 7852713 | Thermal-assisted magnetic recording head and magnetic recording apparatus A thermal-assisted magnetic recording head which heats a magnetic bit of a magnetic disk by light radiation in recording magnetic data into the magnetic disk with a magnetic writing element. The magnetic recording head has a reflecting converging element with a surf... | 12/14/2010 |
| 7480214 | Efficient waveguide coupler for data recording transducer A data recording head having at least two waveguides that are energy-coupled. The first waveguide is end fire coupled to a radiant energy source of a first spot size, and the second waveguide outputs radiant energy of a second spot size onto a recording medium. The ... | 01/20/2009 |
| 7423939 | Method for manufacturing magneto-optical recording medium A method for manufacturing a magneto-optical recording medium in which reading of recorded information is performed through domain wall displacement in a reproduction layer is provided, in which magnetic separation of groove side-wall portions is performed more reli... | 09/09/2008 |
| 7369466 | Optical pickup apparatus and method for controlling phases of three beams An optical pickup apparatus and method are provided. The apparatus and method include a light source unit having a holder in which an optical module having first and second light sources for emitting light having different wavelengths and a grating are installed, an... | 05/06/2008 |
| 7359291 | Magneto-optical storage medium capable of recording plural rows of marks on each track An optical disk recording method of recording data on an optical disk by applying laser light to a track of the optical disk, includes the steps of a) driving a plurality of laser light sources in sequence in a time division manner, and applying a light flux to one ... | 04/15/2008 |
| 7336580 | Optical recording method, optical recorder, and optical recording medium The object of the present invention is to provide an optical recording method for recording data in an optical recording medium, which can reduce jitter of a reproduced signal even in the case where data are recorded at a plurality of linear recording velocities. | 02/26/2008 |
| 7330415 | Optical record carrier recording method and recording apparatus In an optical record carrier recording method for forming marks and lands by irradiating a radiation beam onto a recording surface of an optical record carrier, the radiation beam for each mark to be recorded is set to at least one write power level (Pw) ... | 02/12/2008 |
| 7317674 | Optical pick-up units and laser drivers with increased functionality Optical pick-up units and laser drivers are disclosed, which can be used in various types of information recording/reproducing apparatuses, such as, but not limited to, DVD and CD drives, DVD camcorders, and DVD video recorders. A laser driver integrated circuit (LD... | 01/08/2008 |
| 7317665 | Optical recording method using multiplexer and plural pieces of data bits Information recording equipment of the present invention includes a multiplexer to generate n pieces of synchronous high-speed pulses. Instead of a normal m:1 multiplexer configuration for parallel-serial conversion, an m:n multiplexer configuration is used which ge... | 01/08/2008 |
| 7313075 | Optical information recording method and apparatus An optical information recording method and apparatus which records information on a recording medium by irradiating the recording medium with an irradiation light of a recording power to form a recorded-mark on the recording medium such that reflection coefficient ... | 12/25/2007 |
| 7310206 | Magnetic thin film head with heat-assisted write section and hard disk drive incorporating same A thin film magnetic read/write head for use in magnetic data storage systems to enable writing of data to a magnetic data storage medium with the assistance of laser heating. The read/write head allows magnetic reading of data from the storage medium, and thermally... | 12/18/2007 |
| 7295505 | Method of and apparatus for recording data on optical recording medium A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a ... | 11/13/2007 |
| 7289422 | Optical devices having transmission enhanced by surface plasmon mode resonance, and their use in data recording A device includes an optical gain medium through which optical radiation is amplified. The device includes first and second reflectors disposed around the gain medium. One of the reflectors includes an emission region though which optical output is emitted and a met... | 10/30/2007 |
| 7277364 | Magneto-optical recording medium device A magneto-optical recording medium device of the present invention optimizes a magnetic field forming the front mask and a magnetic field forming the rear mask by use of a single bias magnetic field generator, by shifting the peak position of the bias magnetic field... | 10/02/2007 |
| 7277363 | Magneto-optical recording or reproducing device A magneto-optical recording or reproducing device having an information erasing means for erasing information or data recorded on a magneto-optical recording medium. According to the invention, the information erasing means comprises an erasing magnet having a field... | 10/02/2007 |
| 7277516 | Adaptive equalization system for a signal receiver A communication channel delivers a binary signal representing a data sequence by a pattern of high and low logic levels (symbols) from a transmitter to a receiver. The communication channel low-pass filters the transmitter output signal (VX) so that the signal (VR) ... | 10/02/2007 |
| 7251089 | Storage medium with overcoat layer for enhanced heating A data storage system includes a magnetic storage medium and a write head configured to be positioned adjacent the storage medium and. The write head includes a magnetic field source configured to apply a magnetic field to the storage medium and an optical near fiel... | 07/31/2007 |
| 7239599 | Light irradiation head and information storage apparatus A light irradiation head of the present invention includes: a propagation body having a tapered two dimensional shape axially symmetrical to a predetermined symmetrical axis, and consisting of a first kind material that propagates electromagnetic fields of light; an... | 07/03/2007 |
| 7233453 | Servo track writing device and method thereof A vibration extraction processing unit extracts a deflection component synchronous with a rotation from a clock signal of a non-contact sensor so as to correct a clock jitter. A clock generating unit generates a clock signal of any format frequency preliminarily set... | 06/19/2007 |
| 7227833 | Writing scheme for an optical recording medium A writing scheme for writing an information to an optical recording medium by forming mark areas, e.g. pit areas, corresponding to a predetermined state of said information on a recording surface of said optical recording medium. The writing scheme is adapted to mod... | 06/05/2007 |
| 7218467 | Method and apparatus for optimizing write properties of magnetic head and defining magnetic head A method and apparatus for optimizing write properties of a magnetic head capable of performing read/write functions on a medium including defining the magnetic head as a normal head, a low temperature weak write (WW) head, or a high temperature WW head, and optimiz... | 05/15/2007 |
| 7218470 | Exposure dose control of rotating electron beam recorder In a beam lithography operation the relative motion between a work piece and the exposure beam produces variations in linear speed at different regions of the work piece surface. For example, if a disk work piece rotates with a constant angular velocity (CAV) relati... | 05/15/2007 |
| 7200072 | Domain wall displacement magneto-optical recording and reproducing apparatus A recording/reproducing apparatus for a domain-wall-displacement magneto-optical recording medium with good format efficiency, capable of providing a good reproduction signal and securing a maximum recording region for a user is provided which comprises a recording ... | 04/03/2007 |
| 7190641 | Optical recording, producing apparatus, and method with peak-hold voltage features The present invention proposes a method of controlling the laser power of a semiconductor laser that, in this method of controlling the laser power of a semiconductor laser by applying a power source voltage to between the collector and emitter of an output transist... | 03/13/2007 |
| 7190647 | Information recording method and medium having optimum erasing power An information-recording method and an information-recording medium which make it possible to improve overwrite characteristics in the high speed recording, especially archival overwrite characteristics for overwriting information after retaining the medium in a hig... | 03/13/2007 |
| 7167432 | Read and write sample and hold signal generation A system and method for generating sample control signals for a sample and hold circuit used to control access to optical media is provided. The sample control signals are generated with sufficient duration (width) to adequately sample a reflected laser power signal... | 01/23/2007 |
| 7154826 | Information recording method, information recording medium and information recording apparatus An information-recording method and an information-recording medium which make it possible to improve overwrite characteristics in the high speed recording, especially archival overwrite characteristics for overwriting information after retaining the medium in a hig... | 12/26/2006 |
| 7155732 | Heat assisted magnetic recording head and method A magnetic recording head comprises a write pole having a pole tip adjacent to an air bearing surface, a return pole, a near field transducer positioned adjacent to the air bearing surface for producing near field radiation for heating a portion of a magnetic storag... | 12/26/2006 |
| 7154828 | Optical disc apparatus and recording power determining method thereof A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined d... | 12/26/2006 |
| 7154827 | Optical disk apparatus An optical disk apparatus for recording data on an optical disk. Prior to recording data on the optical disk, a controller records test data in a test area of the optical disk, thereby optimizing write power. After having recorded the test data, the controller compu... | 12/26/2006 |
| 7151728 | Optical disc apparatus and recording power determining method thereof A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined d... | 12/19/2006 |
| 7151724 | Disk recording apparatus and disk recording method A disk recording apparatus for recording data to a disk includes: a reading and writing element for emitting a read beam onto the disk to read out recorded data therefrom while emitting a plurality of write beams simultaneously onto the disk to record data thereto i... | 12/19/2006 |
| 7145857 | Apparatus and method for generating write pulse appropriate for various optical recording media A write pulse generating apparatus includes a control unit which provides information on an optical recording medium type and information on a recording speed factor, and a control signal generating unit which determines a multi-pulse type which is to be generated i... | 12/05/2006 |
| 7133344 | Disk recording-playback device A disk recording-playback device including a laser drive circuit for feeding a drive signal to an optical head and adjusting the power of a laser beam irradiated by the optical head, an error correcting circuit for detecting an error rate of a reproduced signal, and... | 11/07/2006 |
| 7130256 | Mark-length information recording system The mark-length recording system whereby information is recorded by changing the lengths of a recorded portion and an unrecorded or erased portion has a problem that, when new information is recorded in an already recorded region, the newly recorded information may ... | 10/31/2006 |
