An optical disc device capable of detecting a reference position of an optical disc in a rotating direction includes an optical disc rotation drive unit, an optical sensor, and a control circuit. The optical disc rotation drive unit rotates the optical disc provided with a rotation reference mark. The rotation reference mark is formed into a shape having a width changing in the radial direction of the optical disc. The optical sensor detects the rotation reference mark. The control circuit controls the optical disc rotation drive unit and the optical sensor, extracts a detection signal of the rotation reference mark as a pulse waveform from an output signal of the optical sensor with the optical disc being rotated, and specifies a rotation reference position of the optical disc in accordance with the pulse waveform.

An optical disc device capable of detecting a reference position of an optical disc in a rotating direction includes an optical disc rotation drive unit, an optical sensor, and a control circuit. The optical disc rotation drive unit rotates the optical disc provided with a rotation reference mark. The rotation reference mark is formed into a shape having a width changing in the radial direction of the optical disc. The optical sensor detects the rotation reference mark. The control circuit controls the optical disc rotation drive unit and the optical sensor, extracts a detection signal of the rotation reference mark as a pulse waveform from an output signal of the optical sensor with the optical disc being rotated, and specifies a rotation reference position of the optical disc in accordance with the pulse waveform.

An optical disc recording device includes a data acquisition unit configured to acquire bitmap data corresponding to image information, an address information acquisition unit configured to acquire address information set in wobbles of an optical disc by wobble synchronization from the optical disc, a recording position determining unit configured to determine a recording position on the optical disc for recording the bitmap data using the address information, and a mark recording unit configured to form a recording mark corresponding to the bitmap data on the information recording track of the optical disc by applying a light beam having recording power to the recording position on the optical disc.

An optical disc recording device includes a data acquisition unit configured to acquire bitmap data corresponding to image information, an address information acquisition unit configured to acquire address information set in wobbles of an optical disc by wobble synchronization from the optical disc, a recording position determining unit configured to determine a recording position on the optical disc for recording the bitmap data using the address information, and a mark recording unit configured to form a recording mark corresponding to the bitmap data on the information recording track of the optical disc by applying a light beam having recording power to the recording position on the optical disc.

Method and apparatus for storing archive images to a substrate, such as a rotatable optical disc. In some embodiments, an optical medium has a substrate which stores a plurality of archived images in a human detectable form on a surface of the substrate and control data associated with the archived images to facilitate optical recovery of said human detectable images from the surface. The archived images are arranged as a sequence of tiles on a recording layer of the optical medium each tile having an associated length and width. The control data are arranged as machine readable information that identifies an overall content of the plurality of archived images.

Method and apparatus for storing archive images to a substrate, such as a rotatable optical disc. In some embodiments, an optical medium has a substrate which stores a plurality of archived images in a human detectable form on a surface of the substrate and control data associated with the archived images to facilitate optical recovery of said human detectable images from the surface. The archived images are arranged as a sequence of tiles on a recording layer of the optical medium each tile having an associated length and width. The control data are arranged as machine readable information that identifies an overall content of the plurality of archived images.

Provided is a recording medium including an ink receiving layer. The ink receiving layer includes a hydrophilic resin and a low oil absorbing porous silica.

Provided is a recording medium including an ink receiving layer. The ink receiving layer includes a hydrophilic resin and a low oil absorbing porous silica.

Apparatus and method for aligning a rotatable substrate. In some embodiments, a circumferentially extending timing pattern is formed on a substrate. The timing pattern nominally extends about a center point of the substrate at a selected radius. The substrate is mounted to a support mechanism which rotates the substrate about a central axis. Due to mechanical tolerances, the central axis will be offset from the center point of the substrate as a result of an alignment error during the mounting of the substrate. The offset between the support mechanism central axis and the center point of the substrate is determined using a detector that detects two opposing cross-over transitions of the timing pattern during each revolution of the substrate. A feature may be written to the substrate by positioning a write element with respect to the substrate responsive to the detected offset.

The optical disc library apparatus of the present disclosure includes one or more magazines configured to store a plurality of optical discs, a plurality of optical disc drives configured to perform recording or reproducing on or from the optical discs, a changer mechanism configured to perform loading or ejecting any optical disc stored in the magazine to or from any optical disc drive, and a controller configured to control the changer mechanism. The magazine includes magazine-disc association information associating magazine information specifying the magazine with disc information specifying a plurality of optical discs to be stored in the magazine. The controller outputs the magazine-disc association information.