Achromatic polarization devices for optical disc pickup heads

Acousto-optic reading/recording head for high-density...

Active alignment method for multilayer optical disk storage

Active focus alignment system for multilayer optical disk storag

Active tracking method for optical disk storage

Actuator having a plurality of objective lenses installed in...

Adaptive equalizer of recorded information reproducing apparatus

Adaptive high fidelity reproduction system

Adaptively stabilized recording for direct read after write opti

Adjustable optical pickup device with means for removing...

Adjusting a detected signal with a wave form equalizer based upo

Advanced high density data write strategy

Allocation of real time files

Amplifier with peak and bottom signal level shifting control

Amplitude detector for signals having a periodical...

An optical head having a rotating mirror

Anamorphic prism, optical head and optical...

Aperture compensation signal processor for optical recording

Aperture-limiting element and optical head utilizing the same

Apparatus and method for a dual half-aperture focus sensor syste