05-06-2014 дата публикации
Номер: US20140153374A1
An optical disc having a region with pre-recorded data and a recordable region, a method of fabricating the disc, a stamper for forming a disc master, and a recording device for use with the disc are disclosed. Data recorded in the recordable region may be used for activation of the disc, providing unique identification or enhancing program content on the disc. 128-. (canceled)29. A recording device , comprising: retrieving information for identifying at least one recordable region of a disc by one of: accessing pre-recorded data on the disc, and accessing a database external to the disc; and', 'directing a laser to write additional data to the at least one recordable region after disc manufacturing., 'a processor configured for executing a program having instructions for performing a method; the method comprises30. The recording device of claim 29 , wherein the laser has a wavelength in a blue-violet region.31. The recording device of claim 29 , wherein the at least one recordable region has at least one groove with a plurality of gaps; and the laser is configured for writing data to at least one of: the groove claim 29 , and one of the plurality of gaps.32. The recording device of claim 31 , wherein the laser is configured for writing data to at least one gap claim 31 , and the plurality of gaps have a separation between adjacent gaps of less than about 10 μm.33. The recording device of claim 31 , wherein the laser is configured for writing data to at least one gap claim 31 , and the plurality of gaps have a separation between adjacent gaps of between about 0.5 μm and 2 μm.34. The recording device of claim 31 , wherein the laser is configured for writing data to at least one gap claim 31 , and each of the plurality of gaps has a length less than about 200 nm.35. The recording device of claim 31 , wherein the laser is configured for writing data to at least one gap claim 31 , and each of the plurality of gaps has a length sufficient for differential phase detection ...
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