Optical disc having square information pits arranged in symmetri
Optical disc having substrates with a specified thickness/diamet
Optical disc having surface portions configured to each represen
Optical disc having textured structure, and a method of...
Optical disc having tracking polarity information, and...
Optical disc having tracking polarity information, and...
Optical disc having tracking polarity information, and...
Optical disc having two-step pit structure and pickup apparatus
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having uniform structure
Optical disc having variable spare area rates and method for...
Optical disc having variable spare area rates and method for...