Apparatus for writing and/or reading information on and/or from

Apparatus having a movable portion and a fixed portion for repro

Apparatus including at least one probe for being displaced relat

Apparatus of reproducing recorded signal on optical...

Apparatus using an optical pickup

Apparatus with multiple heads adjusted for optimum performance a

Apparatus, system, and method for calibrating a holographic...

Apparatuses and methods for directing light beams in an...

Apparatuses and methods for reading after writing in optical...

Architectures for high-capacity content-addressable...

Arm pipe for record player tonearms

Arrangement for cutting information into a record carrier made o

Arrangement for preventing discharge current flow between a rota

Arrangement for reading an information carrier

Aspherical objective lens for reading information from...

Assembly suitable for reading data based on thermal coupling

Assembly used for precisely positioning the component parts of a

Astigmatic difference correcting method for optical head and app

Astigmatic objective lens for optical head

Astigmatism generating device to remove comma aberration and...