Abstract: 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.

Abstract: An optical record carrier recording method forms pits and lands by directing a radiation beam (12) onto a recording surface (21) of an optical record carrier (20). The radiation beam for each pit to be recorded is set to at least one write power level (Pw) capable of forming a pit during a write power irradiation period (31) and, for each land between the pits, to at least one bottom power level (P0) incapable of forming a pit during a bottom power irradiation period (51).

Abstract: A dual-stack optical data storage medium (10) for recording using a focused radiation beam (9) having a wavelength ? is described The beam enters through an entrance face (8) of the medium (10) during recording. The medium comprises at least one substrate (1, 7) with present on a side thereof a first recording stack (2) named L0, comprising a recordable type L0 recording layer (3), said first recording stack L0 having an optical reflection value RL0 and an optical absorption value AL0 at the wavelength ?, and a second recording stack (5) named L1 comprising a recordable type L1 recording layer (6), said second recording stack L1 having an optical reflection value RL1 and an optical absorption value AL1 at the wavelength ?, and a transparent spacer layer (4) sandwiched between the recording stacks (2, 5). The second recording stack is present closer to the entrance face than the first recording stack.

Abstract: The present invention relates to a multi-stack optical data storage medium (10). The medium comprises a first substrate (1a) with present on a side thereof a first recording stack (13) named L0, a second substrate (1b) with present on a side thereof a second recording stack (12) named L1 comprising a recordable type L1 recording layer (4) having a thickness tRL1 and a complex refractive index n??i*k? at a wavelength ?. A second reflective layer (6) is present adjacent the L1 recording layer (4) at a side most remote from a radiation beam (20) entrance face (11) of the medium. The second recording stack L1 (12) is present at a position closer to the entrance face (11) than the L0 recording stack (13). A radiation beam transparent spacer layer (9) is sandwiched between the recording stacks (12, 13).

Abstract: A multilayer record carrier of a writable type has a first recording layer (40) having a first recording stack (50,51) of a first type and a second recording layer (41) having a second recording stack (54,55) of a second type. The first and second recording stacks have different writing parameters. Each recording layer has a pre-formed recording control pattern that is readable via a laser beam for indicating the track. At least one recording control pattern comprises a recording stack type indicator for indicating the writing parameters of the second recording stack. A recording device has a control unit (20) for adjusting recording parameters in the device in dependence of the recording stack type indicator retrieved from the recording control pattern.

Abstract: The invention relates to a method and device for forming marks and lands by applying a radiation beam to a recording surface of an optical record carrier. During a recording process a reading power level is set in dependence with a recording power level (recording speed). Additionally, cooling gaps are proposed immediately after the recording pulses. The reading during the recording is carried out only for longer lands. The invention relates to a optical record carrier, where the formula for determining the reading power is contained in the control information.

Abstract: An optical record carrier recording method forms pits and lands by directing a radiation beam (12) onto a recording surface (21) of an optical record carrier (20). The radiation beam for each pit to be recorded is set to at least one write power level (Pw) capable of forming a pit during a write power irradiation period (31) and, for each land between the pits, to at least one bottom power level (P0) incapable of forming a pit during a bottom power irradiation period (51).

Abstract: An optical data storage medium (20) for recording by means of a focused radiation beam (29) is described. The radiation beam having a wavelength ? 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 ñM?=nM??i*kM?, 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 ñT?=nT??i*kT? and a recording layer (25) of a material having a complex refractive index ñR?=nR??i*kR? 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+kM?2)+0.17<g*nT/?<0.22/(3.0+kM?2)+0.45 and 0.2<(dRG?dRL)/g<0.

Abstract: A dual-stack optical data storage medium (10) for write-once recording using a focused radiation beam (9) entering through an entrance face (8) of the medium is described. The medium comprises at least one substrate (1, 7) with present on a side thereof a first recording stack (2) named L0, comprising a write-once type L0 recording layer (3) with an absorption kL0 and a second recording stack (5) named L1 comprising a write-once type L1 recording layer (6) 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 (8) than the second recording stacks When the following conditions are fulfilled: 0.45=TL00.75 and 0.40=RL1=0.80 and kL0<0.3 and kL1<0.3 a dual stack write-once medium is achieved which can be played in a standard DVD-ROM player.

Abstract: The invention relates to methods and devices for forming marks and lands by applying a radiation beam (32) to a recording surface (301) of an optical record carrier (30). Recording strategies are proposed for recording information at high recording speeds. An intermediate power level (P1, P2) is introduced in between the bottom power level (P0) and the write power level (Pw), its value being dependent on the length of the preceding land (151, 152, 153). A raised write power level (PR1, PR2) is also proposed, its value being dependent on the length of the mark to be recorded (241, 242, 243).

Abstract: A method and device are described for writing an optical record carrier, in which a mark representing recorded data is written in a phase change layer of a record carrier by a sequence of radiation pulses. A trailing power level (t) having a value higher than the erase power level (e) is introduced after a last write pulse 3 in a sequence. Additionally, the power level of the last write pulse 3 in a sequence may be raised. This results in a reduced jitter of the marks written, especially when writing at high recording speeds.

Abstract: The invention relates to methods and devices for forming marks and lands by applying a radiation beam (32) to a recording surface (301) of an optical record carrier (30). Recording strategies are proposed for recording information at high recording speeds. An intermediate power level (P1, P2) is introduced in between the bottom power level (P0) and the write power level (Pw), its value being dependent on the length of the preceding land (151, 152, 153). A raised write power level (PR1, PR2) is also proposed, its value being dependent on the length of the mark to be recorded (241, 242, 243).

Abstract: The invention relates to methods and devices for forming marks and lands by applying a radiation beam (32) to a recording surface (301) of an optical record carrier (30). Recording strategies are proposed for recording information at high recording speeds. An intermediate power level (P1, P2) is introduced in between the bottom power level (P0) and the write power level (Pw), its value being dependent on the length of the preceding land (151, 152, 153). A raised write power level (PR1, PR2) is also proposed, its value being dependent on the length of the mark to be recorded (241, 242, 243).

Abstract: The invention relates to methods and devices for forming marks and lands by applying a radiation beam (32) to a recording surface (301) of an optical record carrier (30). Recording strategies are proposed for recording information at high recording speeds. An intermediate power level (P1, P2) is introduced in between the bottom power level (P0) and the write power level (Pw), its value being dependent on the length of the preceding land (151, 152, 153). A raised write power level (PR1, PR2) is also proposed, its value being dependent on the length of the mark to be recorded (241, 242, 243).

Abstract: The invention relates to an optical record carrier recording method for forming pits and lands by directing a radiation beam (12) onto a recording surface (21) of an optical record carrier (20). The radiation beam for each pit to be recorded is set to at least one write power level (Pw) capable of forming a pit during a write power irradiation period (31) and, for each land between the pits, to at least one bottom power level (P0) incapable of forming a pit during a bottom power irradiation period (51).

Abstract: The invention relates to methods and devices for forming marks and lands by applying a radiation beam (32) to a recording surface (301) of an optical record carrier (30). Recording strategies are proposed for recording information at high recording speeds. An intermediate power level (P1, P2) is introduced in between the bottom power level (P0) and the write power level (Pw) , its value being dependent on the length of the preceding land (151, 152, 153). A raised write power level (PR1, PR2) is also proposed, its value being dependent on the length of the mark to be recorded (241, 242, 243).