Focused spot position-discriminating system and optical disk wit

Focused-spot-position detection device for optical information r

Focused-spot-position detection device for optical information r

Focusing a light beam more than thirty focal depths from the...

Focusing adjustment of an optical pickup

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 circuit in an optical disk device

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 circuitry for an optical memory system

Focusing control method for reading/writing optical disc

Focusing control system

Focusing control system for use in an information recording and

Focusing detection apparatus