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| 20090310456 | High data capacity storage medium with protection code, method for optaining the protection code and respective data reading apparatus - The optical storage medium comprises a substrate layer, and a data layer disposed on the substrate layer, the data layer comprising data being arranged in tracks as marks and spaces. A protection code is coded in one of the tracks or a part of a track which code comprises marks of a first size and marks of a smaller, second size. The marks of the second size have in particular a width being smaller than the width of the marks of the first size. To obtain the protection code, a method is used comprising the steps of reading a track or a part of a track with a first laser power for obtaining a first data signal, reading the same track or the same part of a track in another step with a second laser power being different from the first laser power for obtaining a second data signal, and calculating the protection code by taking into account the first and the second data signals. The protection code may be calculated for example by a microprocessor of a respective data reading apparatus. | 12-17-2009 |
| 20100054112 | OPTICAL STORAGE MEDIUM AND RESPECTIVE APPARATUS FOR RECORDING AND/OR READING DATA - The optical storage medium comprises a read-only region with a substrate layer, an data layer, and a mask layer with a phase change material for providing a super resolution near field effect, which layers are arranged as a stack of layers, and a recordable region comprising a layer with a tracking structure for providing a tracking information. The tracking structure is covered by the mask layer for using the mask layer as the data layer of the recordable region. The optical storage medium is in particular an optical disc and the recordable region a reserved area and/or an inner area of the optical disc. The apparatus for recording and/or reading data from the optical disc comprises a pickup unit providing a laser beam for reading data from the read-only region with the super resolution near-field layer of the optical storage medium, and uses this laser beam for recording and/or reading data on the data layer of the recordable region. The pickup unit comprises in particular a Blu-ray disc type pickup in accordance with the Blu-ray disc system. | 03-04-2010 |
| 20100189950 | Optical storage medium comprising a mask layer with a super resolution near field structure - The optical storage medium according to the invention uses a mask layer as a super resolution near field structure, which comprises a doped semiconductor material. The semiconductor material is n-doped particularly such that the reflectivity of the semiconductor material is increased, when irradiated with a laser beam. As a semiconductor material advantageously an indium alloy and as a doping material selenium or tellurium can be used. For the manufacturing of a respective optical storage medium a sputtering method for depositing the doped semiconductor material as the mask layer can be used, wherein the dopant is included already in the semiconductor sputtering target. | 07-29-2010 |
| 20110002218 | OPTICAL STORAGE MEDIUM COMPRISING A MULTILEVEL DATA LAYER - The optical storage medium comprises a substrate layer, a data layer, and a nonlinear layer with a super-resolution structure disposed on the data layer, wherein pits and lands having a size above a diffraction limit of a pickup for reading of the data establish a first and a second level of the data layer, and pits and lands having a size below the diffraction limit of the pickup are arranged on a further level of the data layer. In a preferred embodiment, pits having a size below the diffraction limit are arranged on a third level and lands having a size below the diffraction limit are arranged on a fourth level of the data layer. The optical storage medium is in particular a read-only optical disc comprising a phase-change material, for example AgInSbTe, for providing the super-resolution effect. | 01-06-2011 |
| 20110038248 | OPTICAL STORAGE MEDIUM COMPRISING INVERTED SUPER-RESOLUTION PITS AND LANDS - The optical storage medium comprises a substrate layer, a data layer having a pit/land data structure with data arranged in tracks on the substrate layer, and a nonlinear layer with a super-resolution structure disposed on the data layer, wherein a land having a size below the diffraction limit is inverted to a pit and enclosed by auxiliary lands, and a pit having a size below the diffraction limit is inverted to a land and enclosed by auxiliary pits. The optical storage medium is in particular a read-only optical disc comprising a phase-change material, for example AgInSbTe, for providing the super-resolution effect. | 02-17-2011 |
| 20110064902 | Optical storage medium comprising a super-resolution structure with grainy impurities of a dielectric material - The optical storage medium comprises a substrate layer, a read-only data layer with a pit structure disposed on the substrate layer, a cover layer and a nonlinear layer with a super-resolution structure disposed between the data layer and the data layer, which super-resolution structure includes a semiconductor material and grainy impurities of a dielectric material, wherein the semiconductor material has an increased reflectivity, when irradiated with a laser beam, and wherein the dielectric material is arranged as a dielectric layer having a thickness below 5 nm. The dielectric material consists advantageously of an inhomogeneous layer of a nitride material, for example GeN, arranged between a first and a second nonlinear layer. | 03-17-2011 |
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| 20110261665 | Optical disc with protection code, method for optaining the protection code and respective apparatus for reading of data - The optical disc comprises a substrate layer, a read-only data layer having a pit/land data structure including user data and control data arranged in tracks on the substrate layer, and a nonlinear layer with a super-resolution structure disposed on the data layer, wherein the control data are correctly readable only by including a reverse rotation of the disc. The control data include in particular a protection code for the disc, for example a copy protection code, so that the user data of the disc are only readable after reading of the control data. | 10-27-2011 |
| 20110276991 | Optical disc with improved sensitivity for super-resolution pits and lands - The optical disc comprises a substrate layer, a read-only data layer having a pit/land data structure with an average pit width, arranged in tracks on the substrate layer, and a nonlinear layer with a super-resolution structure disposed on the data layer, wherein a super-resolution pit following a super-resolution land and a preceding diffractive pit is enlarged in width with regard to the average pit width, and a diffractive pit preceding a super-resolution land and a subsequent super-resolution pit is reduced in pit width with regard to the average pit width. | 11-10-2011 |
| 20120068138 | OPTICAL STORAGE MEDIUM COMPRISING TWO NONLINEAR LAYERS - The optical storage medium comprises a substrate layer, a data layer arranged on the substrate layer, a first nonlinear layer with a first super-resolution structure arranged above the data layer, and a second nonlinear layer with a second super-resolution structure arranged above the first nonlinear layer, the first nonlinear layer comprising a material having an increased reflectivity when irradiated with a laser beam and the second nonlinear layer comprising a material showing a transparency when irradiated with a laser beam. The first nonlinear layer comprises in particular a semiconductor material of one of the III-V semiconductor family having a low band-gap. And the second nonlinear layer comprises in particular a phase change material, for example SbTe or AIST. | 03-22-2012 |
