Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715)
06/1998
06/02/1998US5761163 Track jump servo apparatus for disc reproducing system
06/02/1998US5761162 For providing tracking and focus error signals
06/02/1998US5761160 Optical disk playback and recording device which alternately allocates logical addresses on different sides of disk
06/02/1998US5761111 Method and apparatus providing 2-D/3-D optical information storage and retrieval in transparent materials
06/02/1998US5760991 Disk storage unit positioning control for applying DC offsets to a tracking error
06/02/1998US5760907 Process and device for the optical testing of a surface
06/02/1998US5760901 Method and apparatus for confocal interference microscopy with background amplitude reduction and compensation
06/02/1998US5760859 Retardation layer having a dispersion adapted to the active liquid-crystalline cell
06/02/1998US5759749 Developing method and developing apparatus for optical record medium
06/02/1998US5759657 Optical recording medium and device for reproducing the same
06/02/1998US5759447 Erasable optical memory and method
06/02/1998US5759332 Process of reproducing optical discs and optical discs produced by the same
05/1998
05/28/1998WO1998022947A1 Writing device, record carrier and method of writing information blocks, and reading device for reading information blocks
05/28/1998WO1998022946A2 Writing device, record carrier and writing method, and reading device for reading information blocks
05/28/1998WO1998022943A1 Optical disc reader
05/28/1998DE19752437A1 Optical disc playback method for disc with optical substrate
05/28/1998DE19749149A1 Reduced cycle time in manufacturing thin precision plastic mouldings e.g. video discs
05/27/1998EP0844612A2 Apparatus for reproducing information from an optical disc
05/27/1998EP0844611A2 Optical disk
05/27/1998EP0844609A1 Optical disk device
05/27/1998EP0844608A2 Optical information medium
05/27/1998EP0844607A2 Information recording medium and information recording and reproducing apparatus using the same
05/27/1998EP0844606A1 Objective lens and optical head and optical disk device using the same
05/27/1998EP0844605A2 Optical pickup
05/27/1998EP0844604A2 Magneto-optical read head
05/27/1998EP0844512A1 Apparatus for recording data on movie film
05/27/1998EP0844243A1 Sulfonamide compound and method for its production, metal chelate compound employing the sulfonamide compound, and optical recording medium employing the metal chelate compound
05/27/1998EP0844058A1 Mold for making disc substrate, process for producing mold and disc substrate
05/27/1998CN1183161A Method for replacement for optical disc, and an optical disc
05/27/1998CN1182933A Size reduced compact disc picking up system
05/27/1998CN1182931A Optical head device and disc reproducing apparatus
05/26/1998US5757978 Method and system for detecting localized birefringence defects in a dynamic global birefringence field
05/26/1998US5757765 Disc protection structure
05/26/1998US5757763 Optical information storage via amplitude modulation
05/26/1998US5757759 Optical disk data recording and reproduction with opposed polarity in adjacent tracks
05/26/1998US5757758 Optical pickup apparatus objective lens and converging optical system for optical pickup and optical disk apparatus
05/26/1998US5757757 Optical pickup
05/26/1998US5757756 Reducing mark length variations in recording data in wobbled groove storage media
05/26/1998US5757755 Data reading/writing optical head with holographic coupler
05/26/1998US5757754 Holographic optical head
05/26/1998US5757751 Baseline correction circuit for pulse width modulated data readback systems
05/26/1998US5757750 Optical disk having both constant linear and constant angular velocity recording regions and optical disk recording system
05/26/1998US5757749 Information processing system operable with a detachable recording medium
05/26/1998US5757748 Automatic gain control apparatus for optical disc player
05/26/1998US5757747 Tracking servo signal processing circuit and read apparatus using the same
05/26/1998US5757746 Method and apparatus for controlling track kick for optical disk drive
05/26/1998US5757745 Focus servo controlling method and apparatus
05/26/1998US5757744 Optical scanning apparatus for a multi-layer record carrier, including a focus control circuit
05/26/1998US5757743 Electric circuit for providing a position indicator signal in a system for multilayer optical disk storage
05/26/1998US5757742 Optical pickup apparatus for optical record media and identification apparatus for identifying the type of optical record media
05/26/1998US5757741 CD ROM head with VCSEL or VCSEL array
05/26/1998US5757733 Optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer
05/26/1998US5757568 System and method for encoding a servo address
05/26/1998US5757495 Checking device for flatness of a drive chassis of a disc player
05/26/1998US5757465 Storage medium for carrying information encoded in two dimensions
05/26/1998US5757412 Apparatus for producing optical disc and method of production thereof
05/26/1998US5757296 Data decoding apparatus and method and recording medium
05/26/1998US5756689 Diazo compounds for laser-induced mass transfer imaging materials
05/26/1998US5756265 Multilayer optical disc and method of making same
05/26/1998US5756130 Stamper for producing recording medium
05/26/1998CA2137220C Track seek method and device for use with an optical information recording and reproducing apparatus
05/22/1998WO1998021718A1 Optical information recording medium and production method thereof
05/22/1998WO1998021717A1 Method and device for recording data in an optical memory card
05/22/1998WO1998021715A1 Slotted flex circuit and outer return path for a disk drive actuator
05/22/1998WO1998021521A1 Two-photon or higher-order absorbing optical materials and methods of use
05/20/1998EP0843309A1 Bearing structure for stepping motor
05/20/1998EP0843306A1 Optical disc, process for producing the optical disc and its manufacturing apparatus
05/20/1998EP0843305A2 Optical recording method with varying light intensity
05/20/1998EP0842988A1 Spin-transition chemical compounds and temperature threshold crossing display devices comprising an active medium which contains at least one of those compounds
05/20/1998EP0842739A2 Method and device for mechanically removing a foreign matter coating from a base material
05/20/1998EP0842510A1 System comprising optical discs and a scanning device
05/20/1998CN1182497A Information carrier and recording device for rocording information carrier
05/20/1998CN1182267A 输入信号放大器 Input signal amplifier
05/20/1998CN1182266A Disk driving system and disk driving method
05/20/1998CN1182265A Optical carrier
05/20/1998CN1182264A Optical pickup device compatible for multiple disk formats
05/20/1998CN1182263A Compatible optical pickup capable of scanning multiple tracks
05/19/1998US5754687 Information recording medium and information reproducing apparatus capable of stably reproducing changeable code patterns at high speed
05/19/1998US5754649 Video media security and tracking system
05/19/1998US5754648 Video media security and tracking system
05/19/1998US5754523 Optical memory medium with preformed pit arrangement
05/19/1998US5754522 Method for forming disk, disk forming apparatus, data recording/reproducing method, data recording/reproducing apparatus, and disk capable of recording/reproducing data in high density
05/19/1998US5754521 Recording medium having a first management area for managing a first attribute and a second management area for managing a second attribute of a program recorded in a recording area
05/19/1998US5754520 Optical data carriers and reading devices therefor
05/19/1998US5754515 Active alignment method for multilayer optical disk storage
05/19/1998US5754514 Phase controlled evanescent field systems and methods for optical recording and retrieval
05/19/1998US5754513 Information pick-up apparatus and optical disk apparatus
05/19/1998US5754512 Correction elements to lower light intensity around an optical axis of an optical head with a plurality of focal points
05/19/1998US5754511 Optical information reproduction by irradiating two laser beams into a recording medium of at least three energy levels and detecting absorption or photoluminescence
05/19/1998US5754509 Disc device having heads mounted on the housing and movable in a radial direction
05/19/1998US5754508 Method and apparatus for simultaneously recording information data on two recording surfaces of an optical disc at equal data states
05/19/1998US5754507 Multi-layered optical disk reproducing apparatus with focus search
05/19/1998US5754506 Optical disk drive and optical disk having address pits for sectors in land and groove tracks
05/19/1998US5754505 Optical disc system with an optical disc having at least one channel of a multiple channel signal recorded on each side of a wobbling groove
05/19/1998US5754504 Device for recording or reproducing information on an optical recording medium having an objective lens with an astigmatism producing off optical axis minimum total astigmatism position to correct tracking astigmatism
05/19/1998US5754503 Optical device with improved focused error detection and tracing error detection for optical disk drive
05/19/1998US5754215 Control circuit for polygon mirror motor and laser beam printing machine using the same
05/19/1998US5754022 Optical pickup moving mechanism
05/19/1998US5753413 Rewritable medium for recording information in which the atomic arrangement is changed without the shape being changed and the optical constant is changed
05/19/1998US5753334 Optical recording medium
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