Method and apparatus for focus control of lens for reading...

Method and apparatus for focusing a recording light beam on a re

Method and apparatus for generating focus error signals in a...

Method and apparatus for generating tracking error signals by me

Method and apparatus for generating velocity error signals

Method and apparatus for high speed data recovery from CD-ROMS o

Method and apparatus for high speed optical storage device

Method and apparatus for high-density recording and reproduction

Method and apparatus for high-density reproduction

Method and apparatus for identifying the type of servo system to

Method and apparatus for initializing optical disk drive apparat

Method and apparatus for leading-in focus servo by moving the ob

Method and apparatus for long seeking control of pickup head

Method and apparatus for maintaining a recording light beam in a

Method and apparatus for manufacturing information storage devic

Method and apparatus for measuring off-track detection...

Method and apparatus for measuring speed of movement during beam

Method and apparatus for multi-channel auto-focus

Method and apparatus for optical head and optical...

Method and apparatus for optical recording and reproducing...