Optical disc assemblies for optical disc write/read apparatus

Optical disc unit, fabrication method and cooperating write and/

Optical disc unit, fabrication method and cooperating write and/

Optical disc write/read apparatus

Optical disc write/read apparatus with disc mounting means

Optical disk having elastic deformable spacer

Optical disk mounting means for write/read apparatus

Optical floppy disc data storage and retrieval techniques

Optical foam-spacer disk assembly

Optical information record disk

Optical information recording medium

Optical information recording medium having protective layer

Optical recording and reproducing disc

Optical recording disk