A scanning device producing a first and a second scanning spot w

A super-resolution optical head with signal corrective circuit

Aberration adjustment device, method thereof, optical...

Aberration correcting apparatus

Aberration correcting device and optical recording medium...

Aberration correcting device and optical recording medium...

Aberration correcting device, optical head, and optical disc...

Aberration correcting element and assembly

Aberration correcting element in the optical head of a...

Aberration correcting optical unit, optical pickup apparatus...

Aberration correcting unit, optical pickup apparatus, and...

Aberration correction apparatus, and control apparatus,...

Aberration correction element and optical pickup adopting...

Aberration correction liquid crystal device and optical...

Aberration detection device and optical information...

Aberration detection device and optical pickup device...

Abnormality detection of a recording medium in a magneto-optical

Accelerometer using field emitter technology

Achromatic expansion prism for magneto-optical drive

Achromatic polarization devices for optical disc pickup heads