摘要:
A method of recording information stores lead-out information on a multilayer record carrier of an opposite track path type. A two part recording area across two layers is logically interrupted by an intermediate zone. The recording area is preceded by a lead-in zone located at the start of the first recording layer and followed by a lead-out zone located at the end of the second recording layer. An outer lead-out part and an inner lead-out part are recorded separated by an unrecorded area and together constituting the lead-out information on the second recording layer. The inner lead-out part covers a predefined radial position range corresponding to a range of radial positions used by reading devices for accessing the second recording layer during a disc loading procedure. The outer lead-out part is recorded at the end of an area of the second recording layer containing user information.
摘要:
A dual-stack recordable optical data storage medium wherein a focused radiation beam having a wavelength λ enters through an entrance face of the medium during recording. The medium includes a substrate, a first recording stack L0, including a recording layer, the first recording stack L0 having an optical reflection value RL0 and an optical absorption value AL0 at the wavelength λ, and a second recording stack L1 including a recording layer, the second recording stack L1 having an optical reflection value RL1 and an optical absorption value AL1 at the wavelength λ, and a transparent spacer layer between the recording stacks. The second stack is closer to the entrance face than the first stack. By fulfilling the formula AL1≦1−Rmin−√(Rmin/RL0), where Rmin is the minimum effective optical reflection value for each recording stack, full compatibility is achieved with a read only version of the medium.
摘要:
A dual-stack optical data storage medium for write-once recording using a focused radiation beam entering through an entrance face of the medium is described. The medium includes at least one substrate with present on a side thereof a first recording stack L0 having a write-once type L0 recording layer with an absorption kL0 and a second recording stack L1 including a write-once type L1 recording layer with an absorption kL1. The first recording stack L0 has an optical reflection value RL0 and an optical transmission value TL0 and the second recording stack has an optical reflection value RL1. The first recording stack is present at a position closer to the entrance face than the second recording stacks When the following conditions are fulfilled: 0.45 ≦TL0≦0.75 and 0.40 ≦RL1≦0.80 and kL0
摘要:
A method of optimizing the write power for recording marks in an information layer of a record carrier by irradiating the information layer with a (pulsed) radiation beam. The method includes recording a pattern of test marks including short marks having a predetermined short nominal runlength onto the record carrier by applying at least three different write powers; measuring the runlengths of the recorded short marks obtained by applying the at least three different write powers; and determining an optimum write power based of the deviations of the measured runlengths from the nominal runlength of said short marks.
摘要:
A method and an optical recording apparatus for determining the optimal write power level at a high recording speed by an OPC-procedure are described. The method involves performing an OPC-procedure at a lower recording speed and subsequently scaling the obtained results to a higher recording speed.
摘要:
An optical data storage medium (20) for recording by means of a focused radiation beam (29) is described. The radiation beam having a wavelength λ enters through an entrance face (28) of the medium during recording. The medium has a substrate (21) with a surface (24) including a guide groove with a depth g. An inverted stack of layers is present on the substrate (21) including a reflective layer (24a) with a complex refractive index ñMλ=nMλ−i*kMλ, in substantial conformity with the surface (24) of the substrate, a transparent layer (22) through which the radiation beam (29) is incident with a complex refractive index ñTλ=nTλ−i*kTλ and a recording layer (25) of a material having a complex refractive index ñRλ=nRλ−i*kRλ and having a thickness dRG in the groove portion and a thickness dRL in the portion between grooves. The recording layer is interposed between the reflective layer (24a) and the transparent layer (22). When 0.25/(3.0+kMλ2)+0.17
摘要翻译:描述了用于通过聚焦辐射束(29)进行记录的光学数据存储介质(20)。 具有波长λ的辐射束在记录期间通过介质的入射面(28)进入。 所述介质具有带有表面(24)的基底(21),所述表面(24)包括具有深度g的引导槽。 层叠的反向堆叠层存在于基片(21)上,该叠层包括具有复合折射率的反射层(24a),λ1=nλ1/ 基本上与衬底的表面(24)基本一致的透明层(22),辐射束(29)以复合折射率入射的透明层(22) 具有复合折射率的材料的记录层(25)为:λ= n < 在凹槽部分中具有厚度d SUB RG,并且在该凹槽部分中具有厚度d u> <! - SIPO R u> ) u> u> > RG N>和/或N N>和 N> 跟踪信号相反。 以这种方式,反转的记录堆叠被正确跟踪,而不改变光学驱动器,并且实现向后兼容性。
摘要:
The present invention relates to a write-once optical record carrier for high speed recording, in particular to a DVD+R disc. Such a record carrier comprises in general at least a substrate layer (3), a recording layer (2) of an organic dye material on top of the substrate layer (3) and a metal reflective layer (1) on top of the recording layer (2). In order to obtain a less steep temperature gradient at the interface between the recording layer (2) and the reflective layer (1) and thus to prevent mechanical stress leading to a delamination problem it is proposed to reduce the thickness of the metal reflective layer (1) to a range below 75 nm. A dielectric layer of a thickness below 50 nm between the recording layer (2) and the metal reflective layer (1) is also enclosed.
摘要:
The present invention relates to a method of optimizing the write power for recording marks in an information layer of a record carrier by irradiating the information layer with a (pulsed) radiation beam, said information layer having a phase that is reversibly changeable between a first (for example a crystal) phase and a second (for example an amorphous) phase. Since the methods known for 1 T write strategies generally cannot be used for nT write strategies, n being an integer greater than 1, a new method is proposed comprising the steps of: recording (S 1) a pattern of test marks including short marks having a predetermined short nominal runlength onto the record carrier by applying at least three different write powers, measuring (S2) the runlengths of said recorded short marks obtained by applying the at least three different write powers, and determining (S4) an optimum write power on the basis of the deviations of the measured runlengths from the nominal runlength of said short marks.
摘要:
The present invention relates to a method and a corresponding device for transforming a first set of write parameters (W) of a write strategy, in particular a 2T write strategy, for recording marks in an information layer (301) of a record carrier (30) by irradiating the information layer (301) with a pulsed radiation beam (32) at a first recording speed (R) into a second set of write parameters (W′) of said write strategy for recording marks at a second recording speed (R′), T representing the length of one period of a reference clock. In order to achieve an at least acceptable recording performance at the second recording speed, it is proposed according to the present invention that the duration of the write pulses is kept substantially constant in time, and the duration of a complete sequence of write pulses for recording a mark is kept substantially constant as a fraction of the reference clock T.
摘要:
A method of recording information stores lead-out information on a multilayer record carrier of an opposite track path type. A two part recording area (54,61) across two layers is logically interrupted by an intermediate zone (55,56). According to a standardized recording format like DVD the recording area is preceded by a lead-in zone (53) located at the start of the first recording layer and followed by a lead-out zone (64) located at the end of the second recording layer. An outer lead-out part (62) and an inner lead-out part (63) are recorded separated by an unrecorded area (65) and together constituting the lead-out information on the second recording layer. The inner lead-out part covers a predefined radial position range corresponding to a range of radial positions used by reading devices for accessing the second recording layer during a disc loading procedure. The outer lead-out part is recorded at the end of an area of the second recording layer containing user information.