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| Number | Title | Issue Date |
| 7486592 | Optical head having dual optical paths An optical head to access data on an optical recording medium, which has two data storage densities, includes two sets of optical path systems to provide two optical paths that are crossed. Each optical path system includes a laser light generation unit, a light gui... | 02/03/2009 |
| 7333402 | Magneto-optical head support structures A suspension supporting a magnetic head is formed by a member different in material from gimbals. As a result, the characteristic of the gimbals minimizing electric power loss in supplying current while sufficiently elastically holding the magnetic head can be compa... | 02/19/2008 |
| 7331053 | Optical disc drive enclosure An optical disc drive enclosure for enclosing an optical disc drive, the optical disc drive enclosure comprises a cover and a panel. The cover comprises a top wall with at least one catch formed on a lower surface of the top wall. The panel is secured to a front of ... | 02/12/2008 |
| 7286294 | Beam-shaping element for optical radiation and a method for producing said element A beam-shaping element comprises a carrier substrate (1) bearing a thin-layer metallization which is structured for shaping the beam of optical radiation. The thin-layer metallization includes at least two metallic layers (2, 3), which, upon impingemen... | 10/23/2007 |
| 7224644 | Head arrangement for domain expansion magnetic amplifying magneto-optical system A head arrangement for reading a magneto-optical recording medium (10) having a storage layer and a read-out layer, includes an improved field generating device for generating a magnetic field used for copying a written mark from said storage layer to said re... | 05/29/2007 |
| 7221985 | On-screen calibration system and operating method thereof An on-screen calibration system for disc drives and the operating method thereof. The calibration system includes an autocollimator detecting the inclined angle of the stage of a disc drive. A control module is connected to the on-screen display module and a bar cod... | 05/22/2007 |
| 7196975 | Magneto-optical disk with protective layer, and optical disk device On a pit information surface (22d) of a read-only optical disk (22), a protective layer (22f) suited for a floating-type or a sliding-type magnetic head (3) used for a magnetic field modulation type magneto-optical disk is f... | 03/27/2007 |
| 7136409 | Semiconductor laser device and optical pickup device In this semiconductor laser device, a polarization hologram transmits an outgoing beam directed from a semiconductor laser chip to an optical disk as a forward beam without diffracting the beam, and diffracts a backward beam of the laser beam, which is a return beam... | 11/14/2006 |
| 7046461 | Optical component positioning jig and manufacturing apparatus of optical device A manufacturing apparatus (100) of an optical unit includes an optical component positioning jig (300) that has a plurality of holders for holding a plurality of optical components and is positioned at a designed predetermined position of the plurality... | 05/16/2006 |
| 7027269 | Method of manufacturing a magnetic head having a planar coil A simple method of manufacturing a magnetic head having a head face and including a planar magnetic coil (7) which extends parallel to the head face. According to the method, the magnetic coil is formed at a first side of a first substrate (1). Thereaf... | 04/11/2006 |
| 6996545 | Reproduction apparatus and reproduction method of digital video signal or audio signal A reproduction apparatus includes a demodulator which demodulates data modulated in accordance with a modulation rule, a temporal store which stores the data demodulated by the demodulator, an error-corrector which error-corrects the demodulated data stored in the t... | 02/07/2006 |
| 6941571 | Recording and/or reproducing device The present invention provides a recording and/or reproducing apparatus using a magneto-optical disc (3) as a recording medium, which includes a recording and/or reproducing mechanism (7) for recording and reproducing information signals to and from th... | 09/06/2005 |
| 6920087 | Magneto-optical recording apparatus capable of adjusting the magnetic head A magneto-optical disk apparatus generates magnetic field onto a magneto-optical recording medium prior to recording signals in the magneto-optical recording medium having a recording layer and a reproduction layer, by use of magnetic field and laser beam. The magne... | 07/19/2005 |
| 6909673 | Magneto-optical recording apparatus having a magnetic head with a regulating member The magneto-optical recording apparatus of the present invention comprises: a magnetic head of which one end is fixed and of which the other end is free and provided with a magnetic field generating portion for applying a magnetic field onto a magneto-optical record... | 06/21/2005 |
| 6804174 | Magneto-optical disk recording and/or reproducing device A recording and/or reproducing apparatus for magneto-optical disc includes a head supporting mechanism and a movement mechanism. The head supporting mechanism includes a supporting member disposed above a holder in such a manner to oppose an optical pick-up and prov... | 10/12/2004 |
| 6744582 | Thermal-assisted magnetic storage device and method for driving the reading/writing head thereof A thermal-assisted magnetic storage device includes a magnetic recording media of a transparent material, a first marker of a material that is optically singular compared with materials therearound, and a magnetic head disposed on a magnetic head slider facing a rec... | 06/01/2004 |
| 6741525 | Recording and/or reproducing apparatus employing disc cartridge A recording and/or reproducing apparatus includes a base member at least having a rotation driving mechanism for rotationally driving a disc housed in a disc cartridge, a holder into which is inserted the disc cartridge and an ejection lever formed by an elastically... | 05/25/2004 |
| 6683824 | Magneto-optical recording device having optical and magnetic heads moving independently An optical storage device adapted so that a cartridge accommodating an optical storage medium is inserted/ejected with respect to the device. The device includes a drive base, a cartridge holder mounted on the drive base for receiving the cartridge, a fir... | 01/27/2004 |
| 6618218 | Displacement detecting apparatus and information recording apparatus An apparatus for detecting the relative displacement of a surface to be detected, and an apparatus and method for recording information on a hard disc of a hard disk drive using such a detecting apparatus, the detecting apparatus comprising an interferenc... | 09/09/2003 |
| 6507539 | Magneto-optical recording device having optical head and magnetic head moving independently An optical storage device adapted so that a cartridge accommodating an optical storage medium is inserted/ejected with respect to the device. The device includes a drive base, a cartridge holder mounted on the drive base for receiving the cartridge, a fir... | 01/14/2003 |
| 6466523 | Displacement of magnetic head and optical head in magneto-optical recording apparatus A magneto-optical recording head includes a magnetic head for applying a magnetic field to a magneto-optical recording medium, and an optical head placed with interposition of the recording medium in opposition to the magnetic head for projecting a light ... | 10/15/2002 |
| 6222797 | Position adjustment method of a magnetic head using magneto-optical recording medium, and optical recording medium A reading method for a magneto-optical recording medium is provided, irradiating laser light as a reading beam and using a magnetic head. High density and high transmission rate are possible and a correct reading can be performed according to the length o... | 04/24/2001 |
| 6185162 | Method for adjusting magnetic and optical heads in magneto-optical recording device A magneto-optical memory device includes a first unit projecting a light beam onto a desired position on a recording medium, and a second unit applying a magnetic field to a position onto which the light beam is projected. The second unit applies, to the ... | 02/06/2001 |
| 6091673 | Magneto-optical head A magneto-optical head includes an optical head provided with a light-focusing device for focusing a beam spot on an information-recording medium and a magnetic head provided with a magnetic-field applying device for applying a magnetic field to the infor... | 07/18/2000 |
| 6046966 | Magneto-optical data storage system A magneto-optical data storage system having a magneto-optical disk rotatably mounted on a support body. The disk has a planar storage surface with a plurality of concentrically disposed data tracks. A flying magneto-optical head is mounted on the distal ... | 04/04/2000 |
| 5909411 | Magnetically coupled apparatus for inverting a bias field for magneto-optic recording and erasing A bias-field apparatus for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on o... | 06/01/1999 |
| 5831797 | Slider with mesa for optical disc data storage system An optical storage system includes an optical disc for storing information in an optical reading format. An optical transducer is carried on a slider proximate a data surface of the optical disc and is used for transducing information on the disc surface.... | 11/03/1998 |
| 5757734 | Magneto-optical recording medium and method for reproducing from same A magneto-optical recording medium is composed of a reproducing layer, a recording layer, and an initializing layer, which are laminated in this order. The reproducing layer is provided so that a light beam is projected thereon so as to reproduce informat... | 05/26/1998 |
| 5687141 | Method and apparatus for recording information on magnetooptical recording medium while canceling external stray magnetic field A magnetooptical recording apparatus effects recording of information on a recording medium using an optical head and a magnetic head while cancelling an external stray magnetic field generated from an actuator, a linear motor or the like. The external st... | 11/11/1997 |
| 5648943 | Disk recording/reproduction device of reduced thickness with driving mechanism for moving heads parallel to the disk face A disk recording/reproduction device according to the present invention includes: a recording medium including a disk and a protective case for the disk; loading mechanism for guiding the recording medium from a first position outside the disk recording/r... | 07/15/1997 |
| 5513159 | Device for selecting magnetic head to be operated together with an optical head A device is provided for selecting a magnetic head to be operated together with an optical head to record or reproduce a signal on a magneto-optical disc. The device includes a first magnetic head and a second magnetic head, each having different capabili... | 04/30/1996 |
| 5495455 | Magneto-optical disk recording and reading apparatus and method wherein the recording head is controlled in the radial direction of the disk to a desired position A magneto-optical disc recording apparatus includes a magnetic head, an optical head, a position detector and a controller. The magnetic head supplies a vertical magnetic field corresponding to recording data to a magneto-optical disc. The optical head em... | 02/27/1996 |
| 5425009 | Magneto-optical recording apparatus for a high-speed magnetic field inversion A magneto-optical recording apparatus including a carriage provided with a magnetic field generator and an optical pickup for recording a magneto-optical disc, a drive mechanism connected to the carriage for driving the carriage, and a guide for guiding t... | 06/13/1995 |
| 5402397 | Electromagnetic shield device for magneto-optical recording apparatus An optical head applies a laser beam to a region of the magnetooptical disc, and a magnetic head applies a magnetic field to the region of the magnetooptical disc while the laser beam is being applied thereto, thereby to record information in the region. ... | 03/28/1995 |
| 5331611 | Transmission mechanism for magnetic-field generating device in photo-magnetic type recording/reproducing apparatus A recording/reproducing apparatus equipped with an optical pickup device movably disposed in opposed relation to a recording medium for applying a light beam to the recording medium to receive light reflected from the recording medium, and further equippe... | 07/19/1994 |
| 5321686 | Read-write head of an magneto-optical disc player with both heads magnetically coupled together A read-write head of a magneto-optical disc player has an optical head having an optical pickup, and a magnetic head having an electromagnet. Each of the optical head and the magnetic head is slidably held by guide members so as to be moved in a radial di... | 06/14/1994 |
| 5193080 | Magneto-optical recording medium and apparatus Guide parts and driving parts are independently provided for an optical head and a magnetic bias field generator, and a relative position control part controls the relative positions of the two so that the both can access recording medium tracks individua... | 03/09/1993 |
| 5122886 | Selective information playback from recording medium based on user input content codes An information recording medium adapted to record or store therein a set of combination information of time-base-correspondent index signals such as frame numbers and corresponding content codes representing contents of an information signal and an appara... | 06/16/1992 |
| 4571650 | Magneto-optic information storage system utilizing a self-coupled laser An optical information storage system wherein information is read from a magneto-optical storage medium by indicating the storage medium with a first laser beam generated by a semiconductor laser and exploiting the self-coupling effect of the semiconducto... | 02/18/1986 |
| 4561032 | Magnetooptic reproducing device In a magnetooptic reproducing device wherein a light beam polarized in a predetermined direction is incident on a magnetic recording medium and signals recorded on the recording medium are optically read by the utilization of the magnetooptic effect, a po... | 12/24/1985 |
