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Match Document Document Title
7342866 Optical disc and its information recording method and apparatus  
Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical...
7339875 Information storage medium, playback and recording method  
An information storage medium includes a substrate forming a first groove having a depth, and a second groove adjacent to the first groove and different depth from the first groove; and a recording...
7283447 Optical disc and optical disc apparatus  
The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light...
7126906 Optical record carrier, drive unit, data updating method and software version-up method  
A disc-shaped optical record carrier includes a first area having a spiral track extending in a first direction from an inner side on the disc, and a second area having a spiral track extending in...
7095700 Optical disc medium, optical disc recording/reproducing apparatus and method  
The present invention separates MTF into a plus frequency region and a minus frequency region and uses the plus frequency region and the minus frequency region to thereby enable an effectively...
7075870 Recording/reproducing apparatus for optical information recording medium and optical head  
A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording...
7054245 Record carrier, playback device and method of recording information  
A record carrier has substantially parallel tracks having first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations...
7031246 Optical disc, optical disc reproducing method and apparatus, and recording method  
An optical disc playback method is provided which includes steps of reading identification data recorded in an optical disc loaded in an optical disc player and starting reading data from a second...
7006425 Information recording and/or reproducing method and apparatus for three dimensional optical recording medium  
Information is recorded/reproduced by focusing a light beam in/from an optical recording medium capable of forming therein marks for information recording in a plurality of three-dimensional...
6999405 Optical recording medium, master disc for the preparation of the optical recording medium and optical recording and/or reproducing apparatus  
An optical recording medium used as a recording medium for information signals in which, in forming a groove along a recording track, a first groove and a second groove are formed to a first depth...
6999398 Method and apparatus for recording information on information recording medium  
Information is recorded on an information recording medium such as a magneto-optical recording medium, having two recording tracks arranged alternately, typically in a double spiral manner. The two...
6980495 Optical recording apparatus with interleaving blank rounds into spiral track  
In an optical recording apparatus having an optical pickup, a rotating section is provided for rotating an optical disk which is formed thereon with a guide groove to define a spiral track having a...
6867955 ARC discharge protection apparatus  
An arc discharge protection apparatus to prevent arc discharge from occurring in a high voltage output zone caused by abnormal conditions includes an electrode plate to absorb high voltage arc...
6618349 Optical recording medium and its designing method  
In an optical recording medium of land/groove recording system, a sufficient tilt margin and a reduced cross talk are realized simultaneously with a sufficiently increased output. Provided is an...
6618345 Reduced crosstalk optical recording medium using an optically related track pitch  
An optical recording medium includes recording tracks located adjacently to each other and is provided on and/or from which information is recorded and/or reproduced by irradiating with a beam a...
6608800 Optical data-storage apparatus employing optical media with three-dimensional data pattern  
An optical data-storage medium comprises a base structure adapted to supply a peripheral surface with a medium adhered thereon, forming a data surface responsive to a light beam for providing...
6600713 Recording media having separate read only and read/write areas  
A hybrid optical recording medium is arranged to allow original information that is pre-recorded in a mass manufacturing process to be supplemented by additional information written to the disk...
6600711 Optical recording medium including prepit sequence formed at predetermined interval between land track and neighboring groove track along spiral  
An optical recording medium includes a land track and a groove track formed as a recording track to record and write information. A prepit sequence is formed on a middle position between the land...
6549495 Record carrier, playback device and method of recording information  
A record carrier has substantially parallel tracks, which exhibit first variations of a first physical parameter and second variations of a second physical parameter of the track. The first...
6473657 Adaptive motion controller  
An adaptive motion controller for driving a servo motor. The adaptive motion controller has an amplifier including a voltage command which can be set at a voltage at which the amplifier will be...
6430123 Scanning micropatterns on an optical medium  
An optical positioning circuit includes an electro-optic positioner which positions an optical beam on an optical medium to read/write patterns of data on the optical medium, and a driver circuit,...
6339576 Information recording medium which indicates information according to the wobbling of a track and information recording and reproducing apparatus  
A manufacturing method for a stamper for an information recording medium includes driving an original disk, irradiating a beam for exposure on the original disk, performing exposure to light in a...
6310851 Frequency demodulating circuit, optical disk apparatus thereof and preformating device  
A frequency demodulating circuit, optical disk and preformatting device having a decoder for decoding a bit "0" and a bit "1" for reproducing address information recorded as a wobble groove. The...
6307824 Dye record medium, record disc producing apparatus, and information recording/reproducing apparatus  
A dye record disc has a disc shape substrate having a track-forming surface divided into a read-only area and a recordable area. A reproducing track is formed on the track-forming surface in the...
6307799 Acousto optic data storage system on a stationary and high density data storage media  
A miniaturized stationary optical storage system capable of reading and writing data on an optical storage media is disclosed. In the disclosed invention, the disk is held stationary and the beam...
6256282 Optical recording medium and recording method thereof  
A novel recording medium capable of realizing high density, reliability in a recording/reproducing operation and facilitating the process which is performed by a drive apparatus is provided. An...
6203968 Method for manufacturing an optical disk master using an exposure beam, its exposure apparatus and an optical disk  
When a laser beam is directed onto an optical head substrate (3) to allow it to form a spiral or concentric pit strings (P), the laser beam is so shot as to provide a path parallel to, or obliquely...
6147952 Optical disk apparatus for reproducing information from an optical recording medium  
An optical disk apparatus is capable of reproducing information from an optical disk 10. The optical disk apparatus mainly includes an illuminating unit which is formed from a semiconductor laser...
6115346 Method of reducing formatting time for rewritable compact disks by formatting less than the entire logical format  
A method of formatting rewritable compact optical disks. In some example embodiments, a disk is initially partially formatted for immediate useability, and then additional incremental formatting is...
6104686 Copy protection marks on a transparent layer of an optical disk indicating that the disk has been previously accessed  
A method for constructing an optical disk and a method of signal detection which permits a read only device, such as a CD-ROM or DVD-ROM reader, to create a permanent mark on a disk in such a way...
6084839 Method of reducing formatting time for rewritable compact disks by formatting less than the entire logical format  
A method of formatting rewritable compact optical disks. In some example embodiments, a disk is initially partially formatted for immediate useability, and then additional incremental formatting is...
6035351 Storage of user defined type file data in corresponding select physical format  
Storing data on a data processing system is done upon generation of a data file by displaying a user interface allowing user selection of storage criteria for the data file. Responsive to user...
6031808 Optical disc, formed from joining individual discs and method and apparatus for manufacturing and using such optical disc  
A read only memory (ROM) disc 10 has an annular ROM area 12 in an outer area thereof, and a random access memory (RAM) disc 20 has an annular RAM area 22 in an inner area thereof. The ROM disc and...
6018507 Method of and apparatus for recording data on land/groove track on optical recording medium  
An optical recording method according to the invention is provided such, that when an optical pickup (2) is moved over an optical disk (1), the optical pickup (2) being positioned onto the target...
6009058 Method of reducing formatting time for rewritable compact disks by pre-formatting less than the entire standard logical format  
A method of formatting rewritable compact optical disks. In some example embodiments, a disk is initially partially formatted for immediate useability, and then additional incremental formatting is...
5953296 Optical information recording/reproducing apparatus and method with automatic servo loop adjustment function  
An optical information recording/reproducing apparatus for recording and/or reproducing information on or from both a land portion and a groove portion of a recording medium using a light beam...
5889920 Receiver/recorder of television transmissions  
A receiver/recorder for television transmissions whereby continuous recording of television transmission occurs from at least one channel onto a random-access rewritable recording medium. At each...
5872749 Arrangement for reading an optically readable carrier  
The present invention concerns an arrangement for reading an optically readable carrier on which data is stored in the form of diffractive elements. The data elements each have a plurality of...
5850381 Method of recording information on a disc by recording information at interleaved sectors  
A disc shaped data recording medium adapted for recording/reproducing information data in a medium adapted for recording/reproducing information data in accordance with a modified constant angular...
5835404 DNA optical storage device utilizing non-radiative energy transfer  
An optical memory system includes memory cells which utilize synthetic DNA as a component of the information storage mechanism. In the preferred embodiment, memory cells contain one or more...
5809006 Optical disk with copy protection, and apparatus and method for recording and reproducing same  
Copy-protected optical disk format, optical disk recording apparatus for creating disks having such formats and optical disk reading apparatus for reading disks having such formats and for...
5802025 Track detection methods and apparatus for simultaneous monitoring of multiple adjacent tracks of an optical disk  
Track detection methods and apparatus for simultaneous electronic monitoring of the locations of multiple adjacent data tracks is provided. A dedicated tracking detector enables both a longer...
5774439 Optical-disk recording and reproducing apparatus and optical disk for recording information on lands and grooves  
The optical-disk recording and reproducing apparatus is provided with an optical head, a reproduction circuit, a detector circuit, a servo circuit, a recording circuit, and a controller. The...
5774428 Method and apparatus for magneto-optical recording or reproducing using modulated magnetic field  
First, a recording magnetic field is generated by a magnetic head using a coil drive current a 1 , and a first data signal is recorded on a groove of a recording layer of a magneto-optical disk....
5768243 Optical recording medium and its recording apparatus and reproducing apparatus  
An optical recording medium which is constructed in a manner such that a plurality of recording areas in which an information signal is recorded along vortical spiral tracks are arranged in a ring...
5754509 Disc device having heads mounted on the housing and movable in a radial direction  
A disc device accommodates a disc rotatably mounted therein, a plurality of first heads movable in a first direction radially of the disc, and a plurality of second heads movable in a second...
5742578 Information recording and reproducing apparatus using light beam modulation on a spiral guide groove disk  
An information recording and reproducing apparatus comprises an optical device for causing a light beam to impinge upon a disc having a spiral guide groove along which a control signal is...
5734633 Optical-disk recording and reproducing apparatus and method using an optical disk for recording information on lands and grooves  
The optical-disk recording and reproducing apparatus is provided with an optical head, a reproduction circuit, a detector circuit, a servo circuit, a recording circuit, and a controller. The...
5729513 Data storage apparatus for recording and reproducing information on a recording medium by rotating the recording medium at different angular velocities  
A track on the disk is divided into plural concentric zones on the radial position thereof. During recording, the angular velocity varies according to the zones accessed for recording, and the disk...
5703852 Optical disk reproducing apparatus having a cosine equalizer with boosted frequency characteristics  
An optical disk apparatus has an optical pickup, a cosine equalizer having frequency characteristics including a boosting frequency for a frequency component which has a frequency that is about...
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