System for aligning sector marks with data in a disk storage sys
System for constant angular velocity disk recording and...
System for controlling the change of read side for an optical re
System for creating, reading and writing on rotatable informatio
System for detection of readout signals from optical disc
System for making a photoresist master for a hybrid optical...
System for obtaining optimum focusing position in optical disc s
System for optically recording information
System for reading optical recording medium using reference line
System for recording and playing back information with magneto-o
System for reproducing an optical disc
System for storing and reproducing information from a disc shape