90°-bent metallic waveguide having tapered c-shaped...
A tracking circuit for returning an optical beam to a track bein
Aberration correcting apparatus and information recording medium
Aberration correcting apparatus and information reproducing...
Aberration detection device and optical information...
Aberration detection device and optical information...
Aberration detection device, aberration detection method,...
Abnormal track skipping detection and control arrangement
Access control apparatus for optical disk according change of tr
Access control device
Access control method and device of disk unit
Access controlling device for use in an optical disk drive
Accessing apparatus for optical information recording and reprod
Acquiring a best focus using a focus signal offset
Acquiring focus in an optical disk system using a time and shape
Acquiring focus in an optical system using a soft focus acquirin
Acquiring focus in optical systems using a focus error signal an
Acting track-crossing during tracking error adjust
Active tracking system for optical disk storage
Actively athermalized optical head assembly