Optical disk and recording/reproducing method thereof

Optical disk and recording/reproduction apparatus using the...

Optical disk apparatus for recording/erasing information in the

Optical disk arrangement with closed contours whose entire exten

Optical disk arrangement with closed contours whose entire exten

Optical disk arrangement with closed contours whose entire exten

Optical disk arrangement with diffractive tracks allowing positi

Optical disk assembly

Optical disk assembly

Optical disk assembly retaining rings

Optical disk authenticity checking based on precision of a...

Optical disk capable of detecting errors in address area and cor

Optical disk capable of inhibiting from rental use

Optical disk capable of recording information on both groove and

Optical disk capable of recording information on both land and g

Optical disk capable of storing information data at difference c

Optical disk carrier with write-protect mechanism

Optical disk carrying tracking information in multiple formats a

Optical disk cartridge

Optical disk cartridge