Apparatus for making a data record carrier

Apparatus for monitoring optical path differences utilizing an e

Apparatus for mounting and rotating an optical card for recordin

Apparatus for optically recording and reproducing information fr

Apparatus for optically scanning an information plane

Apparatus for pre-forming servo-track portions and sector addres

Apparatus for reading an optical record carrier

Apparatus for reading and/or inputting information

Apparatus for reading from and/or writing to optical...

Apparatus for reading information

Apparatus for reading optically encoded soundtracks

Apparatus for recording and reading information tracks on an opt

Apparatus for recording and reproducing information on an optica

Apparatus for recording and reproducing optical information and

Apparatus for recording and simultaneously reading...

Apparatus for recording images on interior surface of cylinder

Apparatus for recording information and apparatus for...

Apparatus for recording information on an optical disk with a mo

Apparatus for recording information onto surface using...

Apparatus for recording on master optical disc