Optical disk device using a recording medium structurally...

Optical disk device using a recording medium structurally...

Optical disk drives with thermomagnetic writing and...

Optical disk having a protective layer of specified thickness re

Optical disk having playback parameters recorded thereon and met

Optical disk having readable information on both sides of...

Optical disk memory and information processing apparatus

Optical disk memory system utilizing a chiral smectic liquid cry

Optical disk reading and writing system having magnetic write he

Optical disk recorders using disks coatings close to outer surfa

Optical disk recording and reproducing apparatus having faster r

Optical disk recording device having a pre-recording mode

Optical disk unit having reduced recording and reproducing error

Optical disk with magnetic layer separated magnetically...

Optical element for enhanced transmission of light and...

Optical focusing apparatus for the reading of a data medium movi

Optical head and apparatus provided therewith

Optical head and information storage device

Optical head and optical information processor using the same

Optical head for near-field recording and reproducing device