198058 ⎘
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; Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
Objective lens drive device
#302Information recording medium
#303Method for adjusting focus or tracking detection unit, and optical disc device
#304Information recording medium
#305Optical disk recording and playback apparatus and signal detection method utilizing a differential push-pull method and a phase difference method
#306Optical disk recording and reproducing apparatus
#307Recording disc and apparatus and method for reproducing recorded information
#308Optimized tracking method
#309Recording medium and method for recording and reproducing data on and from the same
#310Optical disc device and tracking controlling method therefor
#311Information recording medium, and recording method and reproducing method thereof
#312Information recording medium, and recording method and reproducing method thereof
#313Optical pick-up head, optical information apparatus, and optical information reproducing method
#314Optical pickup device for optical disks having different track pitches
#315Method and system for recording/reproducing data to/from information storage medium
#316Information reproduction device and information reproduction method for reproducing information by switching to servo polarity corresponding to land track and groove track and information recording method for recording information by switching to servo polarity corresponding to land track and groove tract
#317Method for detecting servo error, apparatus therefor, disk which maintains quality of servo error signal, method of controlling servo of disk recording/reproducing apparatus, method of detecting tracking error, and method of detecting tilt error
#318Optical information recording medium and optical information recording and reproducing apparatus
#319Optical head, optical recording and/or reproducing apparatus and integrated optical module
#320Optical disk with plural signal mark positions in a direction substantially perpendicular to tracks
#321Tracking error control system and method
#322Optical miniaturized module, optical pickup device, and optical disk device provided with light source and photodetector
#323Optical information recording apparatus for stable recording
#324Optical pickup
#325Optical system for detecting data signal and tracking error signal
#326Optical recording medium and optical information processor
#327Optical pickup device
#328Recording and/or reproducing apparatus and method with a signal quality determining device and method
#329Method and apparatus for tracking error detection in optical disk driver
#330Carriage servo apparatus, information reproduction apparatus and carriage servo control method
#331Apparatus for recording information and apparatus for recording and reproducing information
#332Tracking gain control method and tracking control circuit
#333Diffraction grating element and optical pickup
#334Recording medium having wobbled groove tracks out of phase with wobbled land tracks, servo controlling apparatus using wobble signal and method thereof
#335Method and device for detecting optical data and reading-writing apparatus for optical data
#336Optical pickup device and optical disk device and optical device and composite optical element
#337Optical head device, and optical recording/reproducing device
#338Information recording medium, information recording/reproducing apparatus and information reproducing method
#339Push-pull signal-generating apparatus, and optical-disk apparatus
#340Optical disc apparatus and tracking control method and program for the optical disc apparatus
#341Method and apparatus for tracking error detection in optical disk driver
#342High-density read-only optical disc, and optical disc apparatus and method using the same
#343Track discriminating apparatus and method for optical recording medium
#344Angle measuring device, optical switching system, and information recording/replaying system
#345Method of preventing optical recording media from being fractured and apparatus thereof
#346Optical pickup and optical recording and/or reproducing apparatus adopting the same
#347Optical recording medium, recording method and apparatus for optical recording medium and reproducing method and apparatus
#348Optical recording apparatus
#349Optical disk device
#350Optical disc recording and reproducing method adaptive to wobble pregroove
#351Optical pickup tracking error detecting method and optical pickup device
#352Optical disk reproducing apparatus for compensating for tracking error by using real-time repetitive control and method of driving optical disk reproducing apparatus
#353Method of driving step motor of compact disc drive
#354Disk drive device and address detection method with binarized push-pull signal
#355Optical pick-up, optical disk apparatus and information processing apparatus
#356Disc recorder and player apparatus including multiple recorder and player subsystems
#357Single beam radial tracking method for optical discs