Apparatus for detecting whether information is recorded on a sto
Apparatus for discriminating optical disc and method therefor
Apparatus for driving an information recording medium and a meth
Apparatus for driving an objective lens utilizing flexible...
Apparatus for driving objective lens
Apparatus for driving objective lens
Apparatus for enabling an autotrack circuit of an optical disc r
Apparatus for generating a tracking error signal
Apparatus for generating seek direction detecting signal...
Apparatus for generating seek direction detection signal
Apparatus for generating track count pulse
Apparatus for generating tracking error signal in optical...
Apparatus for generating tracking error signals
Apparatus for generating tracking error signals
Apparatus for generating tracking error signals
Apparatus for generating tracking error signals in a differentia
Apparatus for inscribing and/or reading a record carrier
Apparatus for judging optical disk
Apparatus for laser beam exposure of a substrate disc
Apparatus for maintaining a disk and optical head in orthogonal