Error correcting apparatus with error corecting signal holding f

Error detecting device for optical head

Error signal detecting apparatus of optical pickup adopting holo

Error signal detection apparatus and reproduction signal...

Error signal detection apparatus for an optical...

Error signal generating circuit

Error signal generation for light beam reflected from optical di

Exposure apparatus of an optical disk master, method of...

Extended focus control

Fast speed reproduction system for digital disc

Feed velocity control apparatus for controlling the movement...

Feedback control apparatus in an optical recording and reproduci

Fine and coarse servo system for access and tracking on an optic

Flexible interface signal for use in an optical disk system...

Flexible servicing of servo algorithms using a digital...

Flying type optical head integrally formed with light source and

Focal point adjusting method, and optical pickup device

Focus acquisition servo system and associated method

Focus actuator driving apparatus

Focus adjusting apparatus for an optical pickup apparatus