Optical tracking system for positioning a beam of light

Optical type information reproducing device

Optical unit having a radiation source, a detector and a grating

Optical video or data tape record and playback apparatus

Optical wavefront modifier

Optical wavefront modifier including a series arrangement of...

Optical waveguide recording medium playing apparatus

Optical write/read device and an information recording media

Optical write/read device and an information recording media

Optical write/read head with laser power control

Optical write/read unit with selective-transparency cover

Optical writing head comprising self-scanning light-emitting...

Optical-integrated unit and optical pickup device used for...

Optical-pick up device using multi-lens holder

Optical-pick-up device achieving accurate positioning of...

Optical-pickup slide, manufacturing method thereof, probe...

Optical-recording medium playback apparatus and...

Optical-recording medium playback apparatus and...

Optical/magnetic composite head having magnetic and optical head

Optically readable media utilizing scanning tunneling microscope