198345 ⎘
Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups - or by different subgroups of group ; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermomagnetic recording, Kerr effect reproducing; Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
Sub-classes:Optical information processing apparatus and optical information processing method, and adjustment device, adjustment method, and adjustment program for optical information processing apparatus
#2Megneto-optical recording device capable of changing the shapes of heating areas
#3Optical fly height measurement
#4OPTICAL DISK DEVICE AND CONTROL METHOD THEREOF
#5Disk device, positioning control circuit and information processing apparatus using same
#6Optical pickup device, recording and reproducing apparatus and gap detection method
#7Optical recording/reproducing apparatus, optical pickup, and tracking error detecting method
#8Demodulation of a focusing error signal during a focus search for a lens focusing control in an optical disc system
#9Optical pickup device and recording and/or reproducing apparatus
#10Optical head, light-emitting/receiving device, and apparatus for recording/reproducing optical recording/recorded medium
#11Read-write head with integrated microactuator
#12Optical storage device, recording method of optical storage medium and program
#13Data reproducer
#14High track density super resolution mo-rom medium
#15Optical disc drive apparatus, method for measuring tilt of an optical disc, and method for correcting tilt of an optical disc
#16Disc reproduction device
#17Magneto optical recording system
#18Optical recording method using land/groove recording
#19Optical recording method using land/groove recording
#20Magneto-optical recording medium and a magneto-optical recording device thereof
#21Optical pickup device that corrects the spot shape of reflected light beams
#22Annealing device and annealing method
#23Magneto-optical recording medium and magneto-optical recording device
#24Optical storage system and control method
#25Method of annealing optical recording medium
#26Information-processing apparatus and information administration system using the same
#27Method and device for detecting optical data and reading-writing apparatus for optical data
#28Optical head device, and optical recording/reproducing device
#29Angle measuring device, optical switching system, and information recording/replaying system
#30Record/playback apparatus and record/playback method
#31Optical recording apparatus
#32Focus control method of optical pick-up system and apparatus thereof
#33Optical pickup tracking error detecting method and optical pickup device
#34Interferometric waveguide usable in shingled heat assisted magnetic recording in the absence of a near-field transducer