Signal wave control circuit

Signal-processing preamplifier for an optical disc system

Simple magneto-optic rewritable head for roughedized environment

Simultaneous MO and ROM optical disk signal detection

Single erasable optical recording layer having both retention an

Single frequency laser source for optical data storage system

Single means for converting beam widths of plural laser...

Single objective lens for use with CD or DVD optical disks

Single objective lens for use with CD or DVD optical disks

Single objective lens for use with CD or DVD optical disks

Single objective lens optical pick-up head

Single source optical disc data storage system

Single surface diffractive element for optical pickup heads

Single-lens optical pick-up head for accessing a DVD disc and a

Slider moving device and information recording/reproducing...

Slim optical pickup apparatus

Small signal amplifying circuit for a pickup cartridge

Small-sized optical memory device and information processing app

Solid immersion lens with increased focusing capacity

Solid immersion lens with semiconductor material to achieve high