198048 ⎘
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 Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
Sub-classes:Methods and apparatuses for compressing and decompressing drive curves
#2Holographic optical pickup device, optical information recording and reproducing device, and method of reproducing optical information, having angular variable element arrangements for changing a light angle
#3Multilevel data structure
#4Method and System for Adjusting the Pitch of Light Spots Used to Read an Information Carrier
#5Magnetic field position feedback for holographic storage scanner
#6High bandwidth data transfer to and from rotating data storage devices
#7Writeable optical recording of multilevel oriented nano-structure discs
#8Method and apparatus for multiplexing optical information for recording and reproducing optical information over optical storage medium
#9Information recording apparatus
#10Optics for double-sided media
#11Method and apparatus for creating a multi-dimensional data signal
#12High bandwidth data transfer to and from rotating data storage devices
#13Optical disk drive using one dimensional scanning
#14Mirror angle measurement and servo control apparatus for holographic digital data storage system