Video disc recording and playback system with two recording area

Video image updating and reproducing device with image selecting

Video recorder-playback machine

Videodisc player with drive means engaging videodisc guide groov

Volume holographic data storage system

Volume holographic data storage system incorporating therein a c

Volume holographic memory and optical information...

Volume holographic memory apparatus having a reference beam and

Volume holographic memory-based optical...

Wave plate and optical pickup unit using the same

Wave plate, optical pickup and optical disc apparatus

Wave-front aberration compensation unit, wave-front aberration c

Waveform shaping method and apparatus for optical recording

Wavefront aberration compensation element, optical pickup,...

Wavefront aberration compensation in an optical data recording a

Wavefront aberration correcting device and optical pickup...

Waveguide multilayer holographic data storage

Waveguide multilayer holographic data storage

Wavelength converting element and system for recording and repro

Wavelength selecting wavelength plate and optical head...