Focus servo device

Focus servo gain setting circuit for optical record disc reprodu

Focus servo pull-in apparatus for use in a compatible disk playe

Focus servo recovery processing method for optical disc...

Focus-balance calibration method

Focus-balance calibration method

Focus/tracking actuator with moving-magnet motors

Focus/tracking servo automatic gain control for optical recordin

Focused-spot-position detection device for optical information r

Focusing and tracking apparatus for an optical data storage devi

Focusing and tracking error control system for an optical record

Focusing and tracking method and system for the read/write head

Focusing and tracking servo system for controlling the projectio

Focusing apparatus and optical disk apparatus using the same

Focusing bias adjusting apparatus and method in optical...

Focusing control apparatus for optimally directing light...

Focusing control apparatus using dynamic target value in relatio

Focusing control apparatus, recording medium, and optical...

Focusing control method for reading/writing optical disc

Focusing control system for use in an information recording and