Optical detector for magnetic fields employing feedback circuitr

Optical detector system for detecting a splice in an endless tap

Optical disc having a protective layer which is thicker at its o

Optical disc having a protective layer which is thicker at its o

Optical disk apparatus with swingable disk tray holder

Optical disk library control system providing an enhanced initia

Optical disk replay device which varies a delay and frequency of

Optical encoder for disc apparatus

Optical equipment assemblies and techniques

Optical head

Optical head with an adjusting mechanism for adjusting the posit

Optical head with solid immersion lens and varying cross...

Optical information recording and reproducing system with...

Optical information recording/reproducing apparatus and...

Optical integrated circuit and optical apparatus

Optical integrated device for magneto-optical reproducing head

Optical read-out magnetic head

Optical recording head including an optical resonant cavity

Optical recording head including an optical resonant cavity

Optical recording medium