Magnification and tracking error correction system for multiple

Manufacturing method for optical head device and optical...

Masking of tracking error signal abnormalities due to media defe

Master-optical-disk processing method and mastering apparatus

Mastering machine for making an on-land recording master disk wi

Mastering machine having non-repetitive runout compensation

Media driving apparatus

Method and an apparatus for measuring optical characteristics of

Method and apparatus applied in optical disc drive for...

Method and apparatus compensating for tilt

Method and apparatus for a high-speed search of an optical...

Method and apparatus for a high-speed search of an optical...

Method and apparatus for aberration correction

Method and apparatus for aberration correction

Method and apparatus for accessing track on an optical disc

Method and apparatus for achieving a short seek with a...

Method and apparatus for achieving a short seek with a...

Method and apparatus for acquiring an index mark

Method and apparatus for acquiring an index mark

Method and apparatus for adjusting a focus bias in an optical di