198042 ⎘
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 into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection; Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
ERROR COMPENSATION METHOD AND APPARATUS FOR OPTICAL DISK DRIVE
#302Optical storage device, optical device and servo controlling method therefor having first and second focus error signal detectors with different detection ranges and target trajectory generator
#303Layer jump control device and method of high-speed optical drive
#304Optical pickup device and apparatus for reading data from optical storage medium
#305Recording medium, method of recording identification information thereof, and recording/reproducing method thereof
#306Optical disc playback apparatus performing defocus adjustment of objective lens
#307Optical disk device
#308Optical disc apparatus
#309Optical disc apparatus
#310Optical disk apparatus and optical disk processing method