WO2013038457A1 - Disque optique et dispositif pour disque optique - Google Patents

Disque optique et dispositif pour disque optique Download PDF

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Publication number
WO2013038457A1
WO2013038457A1 PCT/JP2011/005235 JP2011005235W WO2013038457A1 WO 2013038457 A1 WO2013038457 A1 WO 2013038457A1 JP 2011005235 W JP2011005235 W JP 2011005235W WO 2013038457 A1 WO2013038457 A1 WO 2013038457A1
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WO
WIPO (PCT)
Prior art keywords
recording
optical disc
layer
frequency
recording layer
Prior art date
Application number
PCT/JP2011/005235
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English (en)
Japanese (ja)
Inventor
学 塩澤
Original Assignee
日立コンシューマエレクトロニクス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to PCT/JP2011/005235 priority Critical patent/WO2013038457A1/fr
Publication of WO2013038457A1 publication Critical patent/WO2013038457A1/fr

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G11B7/24041—Multiple laminated recording layers with different recording characteristics
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24047—Substrates
    • G11B7/2405—Substrates being also used as track layers of pre-formatted layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24073—Tracks
    • G11B7/24082—Meandering
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Definitions

  • the present invention relates to an optical disc and an optical disc apparatus.
  • Non-Patent Document 1 a layer (guide layer) having a land / groove structure for performing servo control is provided, and an optical disk (grooveless) having no physical groove structure in a layer (recording layer) for recording / reproduction. Disk), and it is said that manufacturing is easy even when a large number of recording layers are stacked.
  • Patent Document 1 in an optical disc having a plurality of recording layers and capable of recording information at a plurality of recording densities, a plurality of information recording at different data recording densities for each recording layer”
  • An optical disc having a “data recording area” is disclosed.
  • Non-Patent Document 1 When recording / reproducing an optical disc having a large number of recording layers as shown in Non-Patent Document 1, the tilt margin decreases as the recording layer is located farther from the laser light incident surface. When the recording density of the layer is constant, it is difficult to ensure the recording / reproducing performance in the recording layer arranged at a position away from the laser light incident surface.
  • the data recording density depends on the clock frequency of the recording clock.
  • the groove formed on the optical disc is subjected to modulation called wobble.
  • a recording clock is generally generated from the wobble.
  • the recording layer does not have a physical groove structure, and the wobbled layer is limited to the guide layer. Therefore, the wobble of the optical disc having the physical groove structure in the recording layer is limited.
  • the modulation method is used for a grooveless disk, it is difficult to change the recording density according to the recording layer.
  • the present invention provides an optical disc capable of ensuring recording / reproduction performance by changing the recording density in accordance with the recording layer even when a plurality of recording layers are laminated in an optical disc having a guide layer and a recording layer, for example.
  • An optical disk device is provided.
  • the present application includes a plurality of means for solving the above-mentioned problems.
  • an optical disk on which information is recorded or reproduced by laser light a guide layer for servo control, and a thickness of the disk
  • a plurality of recording layers stacked in the direction, and the recording layer closest to the surface on which the laser beam is incident is the first recording layer, and the layer farthest from the incident surface is the second recording layer
  • the recording density of the first recording layer is different from the recording density of the second recording layer.
  • the recording / reproducing performance of the recording medium can be ensured even when a large number of recording layers are stacked.
  • FIG. 1A is an example of a cross-sectional view of an optical disc 100 according to the present embodiment.
  • This optical disc is composed of a layer guide layer 101 having a land / groove structure and a recording layer 102 having no physical groove structure.
  • the land / groove structure of the guide layer 101 is provided with a wobble 204 described later.
  • a management area is secured in one or both of the guide layer 101 and the recording layer 102, and management information to be described later is recorded.
  • optical disc having six recording layers 102 it is only necessary to have two or more recording layers. Further, the positions of the guide layer 101 and the recording layer 102 may be reversed, or the guide layer 101 may be provided between the recording layers 102. Further, as shown in FIG. 1B, as an optical disc having a specific recording area 103 without having a specific layer other than the guide layer 101, the optical disc apparatus virtually records by recording at a predetermined position. A recording layer may be formed.
  • FIG. 2A shows an example of the recording density in each recording layer of the optical disc 100 according to the present embodiment.
  • the L0 layer is a recording layer disposed at a position farthest from the laser light incident surface. Since the tilt margin decreases as the position of the recording layer moves away from the laser light incident surface, recording / reproduction of a recording layer arranged at a position away from the laser light incident surface is performed when the recording density of each recording layer is constant. It becomes difficult to ensure performance.
  • the recording density is changed in order from the recording layer close to the laser light incident surface to the far recording layer, that is, the recording density is lowered, so that it is far from the incident surface. The recording / reproducing performance of the recording layer can be ensured.
  • FIG. 2A shows an example in which the recording density differs for each recording layer.
  • FIG. 2B a plurality of recording layers are divided into groups, and different recording densities may be used for each group. Good.
  • FIG. 3 is a diagram showing an example of the structure of the guide layer 101 of the optical disc according to the present embodiment.
  • a groove 201 and a land 202 are formed on the guide layer 101, and a wobble 204 is formed on the groove 201.
  • the optical spot 203 is controlled so as to follow the groove 201 or the land 202 by the tracking servo of the optical disc apparatus.
  • the wobble 204 formed in the groove 201 is amplitude-modulated, and the light spot 203 follows the groove 201.
  • FIG. 4 is an example of a wobble signal obtained when the guide layer shown in FIG. 3 is reproduced by an optical disk device. A method for generating the wobble signal will be described later.
  • the wobble frequency of the wobble formed on the conventional optical disc is set higher than the servo band of the optical disc apparatus, the light spot does not follow the wobble and travels almost straight through the center of the groove.
  • a wobble signal corresponding to the wobble structure as shown in FIG. 4 can be obtained.
  • FIG. 5 is an example of the frequency spectrum of the wobble signal shown in FIG.
  • the frequency spectrum of the wobble signal is determined by three frequency values: the carrier frequency, the sum of the carrier frequency and the modulation wave frequency, and the difference between the carrier frequency and the modulation wave frequency.
  • FIG. 6 is an example of the wobble frequency corresponding to each recording layer recorded as management information on the optical disc according to the present embodiment. As shown in FIG. 6, a different wobble frequency is set for each recording layer, the optical disk device selects a wobble frequency component based on the recording layer to be recorded, generates a recording clock based on the selected wobble frequency, Recording can be performed at different recording densities. A method for generating the recording clock will be described later.
  • This management information may be recorded on the guide layer and all recording layers, or may be recorded only on the guide layer or only on a specific recording layer. Further, a wobble frequency component corresponding to the recording layer may be recorded on each recording layer.
  • the management information may be recorded in the wobble of the guide layer, or may be recorded in the recording data of the recording layer.
  • the management information When the management information is recorded in the wobble of the guide layer, only the area where the management information is recorded may be modulated with a predetermined frequency. This is because, for example, the management information can be reproduced even when the recording density of each recording layer is unknown.
  • the wobble frequency component is recorded as management information.
  • the recording density as shown in FIG. 2 may be recorded, or both the wobble frequency component and the recording density may be recorded. It may be recorded.
  • this management information may be recorded in advance on the optical disc, or may be recorded by the optical disc apparatus as will be described later.
  • FIG. 7 is an example of the structure of the guide layer 101 of the optical disc 100 according to the present embodiment.
  • a wobble 205 including two types of spatial frequencies is formed in the groove 201.
  • FIG. 8 shows an example of a wobble signal when the guide layer shown in FIG. 7 is reproduced by an optical disk device.
  • FIG. 9 is an example of the frequency spectrum of the wobble signal shown in FIG. f4 and f5 indicate peaks of frequency components included in the wobble signal.
  • f4 and f5 are, for example, 0.2 MHz and 3.8 MHz, respectively.
  • a wobble having two frequency components is shown, but the wobble may have three or more frequency components.
  • the optical disk device will be described.
  • FIG. 10 is a block diagram showing an embodiment of the optical disc apparatus according to the present invention.
  • the optical disc apparatus 800 records or reproduces information by irradiating the optical disc 100 mounted on the apparatus with a laser beam, and communicates with a host 803 such as a PC (Personal Computer) through an interface such as SATA (Serial Advanced Technology Attachment). Do.
  • a host 803 such as a PC (Personal Computer) through an interface such as SATA (Serial Advanced Technology Attachment).
  • the optical disc apparatus 800 includes a controller 801, a signal processing unit 802, an optical pickup 804, a slider motor 805 that moves the optical pickup 804 in the radial direction of the optical disc 100, slider driving means 806 that drives the slider motor 805, Aberration correction driving means 807 for driving the spherical aberration correction element 829 provided in the pickup 804, a spindle motor 808 for rotating the optical disc 100, and a rotation signal for generating a signal synchronized with the rotation of the spindle motor 808 Generating means 809, spindle control means 810 for generating a rotation signal for rotating the spindle motor 808, spindle driving means 811 for driving the spindle motor 808 in accordance with the rotation signal generated by the spindle control means 810, and optical data.
  • Error signal generating means 815 for generating a tracking control means 816 for generating a tracking drive signal according to the tracking error signal, a tracking drive means 817 for driving the actuator 832 according to the tracking drive signal, and an optical disc
  • a relay lens error signal generating means 818 for generating a relay lens error signal indicating the positional deviation of the laser spot focused on the guide layer and the 00 guide layer, and a relay lens driving signal corresponding to the relay lens error signal Relay lens control means 819 for performing the above operation, and relay lens driving means 820 for driving the relay lens 841 according to the relay lens drive signal.
  • the optical pickup 804 includes two optical systems having different wavelengths such as 405 nm and 650 nm, for example, and condenses the recording layer and the guide layer of the optical disc 100, respectively. First, the operation during reproduction of the 405 nm optical system will be described.
  • the laser driver 821 is controlled by the controller 801, and outputs a current for driving the laser diode 822.
  • This driving current is applied with high frequency superposition of several hundred MHz in order to suppress laser noise.
  • the laser diode 822 emits laser light having a wavelength of 405 nm with a waveform corresponding to the drive current.
  • the emitted laser light is converted into parallel light by the collimator lens 823, partially reflected by the beam splitter 824, and condensed on the power monitor 826 by the condenser lens 825.
  • the power monitor 826 feeds back a current or voltage corresponding to the intensity of the laser light to the controller 801.
  • the intensity of the laser beam condensed on the recording layer of the optical disc 100 is maintained at a desired value such as 2 mW.
  • the laser beam that has passed through the beam splitter 824 is reflected by the polarization beam splitter 827 and passes through the dichroic mirror 828.
  • the dichroic mirror 828 is an optical element that reflects light of a specific wavelength and transmits light of other wavelengths. Here, it is assumed that light having a wavelength of 405 nm is transmitted and light having a wavelength of 650 nm is reflected.
  • Convergence / divergence of the laser light transmitted through the dichroic mirror 828 is controlled by the spherical aberration correction element 829 driven by the aberration correction drive unit 807, becomes circularly polarized light by the quarter wavelength plate 830, and is optical disc by the objective lens 844. Concentrate on 100 recording layers.
  • the position of the objective lens 844 is controlled by an actuator 832.
  • the intensity of the laser light reflected by the optical disc 100 is modulated in accordance with information recorded on the optical disc 100.
  • the light is linearly polarized by the quarter-wave plate 830, passes through the dichroic mirror 828 and the spherical aberration correction element 829, and passes through the polarization beam splitter 827.
  • the transmitted laser light is condensed on the detector 834 by the condenser lens 833.
  • the detector 834 detects the intensity of the laser beam and outputs a signal corresponding to the intensity to the signal processing unit 802 and the focus error signal generation unit 812.
  • the signal processing unit 802 performs processing such as amplification, equalization, and decoding on the reproduction signal output from the detector 834, and outputs the decoded data to the controller 801.
  • the controller 801 outputs data to the host 803.
  • the focus error signal generation unit 812 generates a focus error signal for the recording layer from the signal output from the detector 834.
  • the focus control means 813 outputs a focus drive signal corresponding to the focus error signal to the focus drive means 814 in response to a command signal from the controller 801.
  • the focus drive unit 814 drives the actuator 832 in a direction perpendicular to the disk surface in accordance with the focus drive signal.
  • the focus control unit 813 and the focus drive unit 814 operate to perform focus control so that the laser spot irradiated on the recording layer of the optical disc 100 is always focused on the recording layer.
  • recording data and a wobble signal are input to the controller 801 from the host 803 and the signal processing unit 802, respectively.
  • the controller 801 generates a recording clock corresponding to the recording density based on the wobble signal input from the signal processing unit 802, and a recording waveform corresponding to the generated recording clock and recording data input from the host 803 is a laser driver. 821 is output.
  • the laser driver 821 outputs a drive current corresponding to the recording waveform to the laser diode 822, and the laser diode 822 emits laser light with a corresponding waveform, so that recording is performed on the recording layer of the optical disc 100.
  • the laser driver 821 drives the laser diode 835, and the laser diode 835 emits laser light having a wavelength of 650 nm.
  • a part of the laser light passes through a collimator lens 836, a beam splitter 837, and a condenser lens 838, and the power is monitored by a power monitor 839.
  • the intensity of the laser light focused on the guide layer of the optical disc 100 is maintained at a desired power such as 3 mW.
  • the laser beam that has passed through the beam splitter 837 passes through the polarization beam splitter 840, and the convergence / divergence is controlled by the relay lens 841.
  • the laser light that has passed through the relay lens 841 is reflected by the dichroic mirror 828, passes through the quarter-wave plate 830, and is condensed on the guide layer of the optical disc 100 by the objective lens 844.
  • the laser beam reflected by the optical disc 100 is reflected by the polarization beam splitter 840 and condensed on the detector 843 by the condenser lens 842.
  • the signal output from the detector 843 is output to the signal processing unit 802, tracking error signal generation means 815, and relay lens error signal generation means 818, respectively.
  • the signal processing unit 802 generates a wobble signal based on the signal input from the detector 843 and outputs the wobble signal to the controller 801.
  • the tracking error signal generating means 815 generates a tracking error signal for the guide layer of the optical disc 100 from the signal output from the detector 843.
  • the tracking control unit 816 generates a tracking drive signal corresponding to the tracking error signal in response to a command signal from the controller 801.
  • the tracking drive means 817 drives the actuator 832 in the radial direction of the disk according to the tracking drive signal.
  • the tracking control unit 816 and the tracking driving unit 817 operate, so that the tracking control is performed so that the laser spot irradiated on the guide layer of the optical disc 100 always follows the track on the guide layer.
  • the relay lens error signal generation means 818 generates a relay lens error signal that is an error signal in the focus direction with respect to the guide layer of the optical disc 100 from the signal output from the detector 843.
  • the relay lens control unit 819 generates a relay lens driving signal corresponding to the relay lens error signal in response to a command signal from the controller 801.
  • the relay lens driving means 820 drives the relay lens 841 according to the relay lens driving signal. By driving the relay lens 841, the focus position of the laser spot focused on the guide layer changes, and the difference in position between the recording layer and the guide layer can be compensated.
  • the relay lens control unit 819 and the relay lens driving unit 820 operate, the relay lens control is performed so that the laser spot irradiated on the guide layer of the optical disc 100 is always focused on the guide layer.
  • the slider driving unit 806, the aberration correction driving unit 807, and the spindle control unit 810 are also operated by a command signal from the controller 801.
  • the spherical aberration correction element 829 may be disposed at a position that affects both the 405 nm optical system and the 650 nm optical system.
  • the spherical aberration correction element 829 may be disposed between the quarter-wave plate 830 and the dichroic mirror 828. .
  • FIG. 11 is a diagram illustrating an example of a wobble signal generation method by the detector 843 and the signal processing unit 802 in FIG.
  • the detector 843 includes four elements a, b, c, and d, and receives a laser beam 901 including wobble information.
  • the signal processing unit 802 performs a calculation of (a + d) ⁇ (b + c) on the input signal from each element to generate a wobble signal.
  • FIG. 11 shows an example of the detector divided into four, the elements a and d and b and c may be integrated, and the difference between both signals may be taken.
  • FIG. 12 is a diagram showing an example of a method for generating a recording clock from the wobble signal input by the controller 801 in FIG.
  • the wobble signal input to the frequency selection unit 1001 includes a plurality of frequency components as shown in FIGS. 4 and 8 will be described.
  • the frequency selection unit 1001 selects only a desired frequency component from the input wobble signal and outputs it to the phase comparator 1002.
  • a frequency filter can be considered.
  • the phase comparator 1002 outputs a signal corresponding to the frequency difference between the output signals of the frequency selection unit 1001 and the frequency divider 1005 to the loop filter 1003.
  • the loop filter 1003 is for suppressing oscillation of the feedback circuit, and an appropriate low-pass filter is used.
  • a VCO (Voltage Controlled Oscillator) 1004 changes the frequency of an output signal in accordance with the input voltage.
  • the frequency divider 1005 outputs the signal frequency of the VCO 1004 to the phase comparator 1002 as an integral fraction.
  • a plurality of recording clocks can be output from the VCO 1004 even if the setting of the frequency divider 1005 is fixed.
  • the setting of the frequency divider 1005 is fixed to 1/69.
  • the setting resolution of the recording clock frequency to be generated is improved by combining with the frequency selection means 1002, the setting of the frequency divider 1005 may be changed according to a desired recording density.
  • FIG. 13 is an example of a processing flow of the optical disc apparatus 101 from the insertion of the optical disc 100 into the optical disc apparatus 800 until recording is performed.
  • the optical disc apparatus 800 checks the presence / absence of a disc and disc type in S1202.
  • the optical disc apparatus 800 can irradiate the optical disc 100 with laser light and perform recognition by reflected light.
  • adjustment processing for optimizing various parameters in the optical disc apparatus 800 is performed on the inserted optical disc 100.
  • the various parameters include adjusting the amplification factor of the amplifier included in the focus control unit 813 and the tracking control unit 816 according to the reflectance of the optical disc 100.
  • the management information of the optical disc 100 is read in S1204, and the recording density in each recording layer or the wobble frequency component to be selected is obtained.
  • the recording or reproduction is possible, and recording or reproduction can be performed in accordance with a command from the host 803.
  • a recording command is received from the host 803 in S1206
  • the recording layer and recording density are determined based on the management information read in S1204.
  • a recording clock corresponding to the recording density is generated from the wobble signal according to the method described above.
  • recording is performed at a predetermined recording density.
  • the timing of the adjustment process S1203 is not limited to this, and a part of the adjustment process may be performed after the management information read S1204. Further, the recording density in S1206 may be determined by the optical disc apparatus 800, and the determined recording density may be recorded in the management information in order to ensure compatibility with other optical disc apparatuses.
  • the operation of the optical disc apparatus 800 when the wobble frequency includes only a single frequency component will be described. Since the configuration of the optical disc device 800 and the operations other than those described in the present embodiment are the same as those in the third embodiment, description thereof is omitted.
  • recording clocks of 249 MHz, 264 MHz, and 279 MHz can be obtained by fixing the setting of the frequency divider 1005 in FIG. 12 to 1/65, 1/69, and 1/73, respectively. These correspond to recording densities of, for example, 31.5 GB, 33.4 GB and 35.3 GB per layer.
  • the wobble frequency includes only a single frequency component, it is possible to record with different predetermined recording densities on each recording layer of the optical disc 100.
  • Tracking error signal generation means 816 ... Tracking control means, 817 ... Tracking drive means, 818 ... Relay lens error signal Generation means, 819... Relay lens control means, 820... Relay lens driving means, 82 ... Laser driver, 822 ... Laser diode, 823 ... Collimator lens, 824 ... Beam splitter, 825 ... Condensing lens, 826 ... Power monitor, 827 ... Polarizing beam splitter, 828 ... Dichroic mirror, 829 ... Spherical aberration correction element, 830 ... 1/4 wavelength plate, 832 ... Actuator, 833 ... Condensing lens, 834 ... Detector, 835 ... Laser diode, 836 ...
  • Collimator lens 837 ... Beam splitter, 838 ... Condensing lens, 839 ... Power monitor, 840 ... Polarizing beam splitter, 841 ... Relay lens, 842 ... -Condensing lens, 843 ... Detector, 844 ... Objective lens, 901 ... light spot, DESCRIPTION OF SYMBOLS 1001 ... Frequency selection means, 1002 ... Phase comparator, 1003 ... Loop filter, 1004 ... VCO, 1005 ... Frequency divider

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  • Optical Recording Or Reproduction (AREA)

Abstract

Lors de l'enregistrement ou de la lecture d'un disque optique ayant de nombreuses couches d'enregistrement, la marge d'inclinaison de chaque couche d'enregistrement est réduite proportionnellement à la distance à la surface d'incidence du rayon laser. Par exemple, lorsque les couches d'enregistrement respectives ont une densité d'enregistrement fixe, des performances suffisantes d'enregistrement/lecture deviennent difficiles pour assurer qu'une couche d'enregistrement soit positionnée à une certaine distance de la surface d'incidence du rayon laser. La présente invention concerne un disque optique et un dispositif pour disque optique capable d'assurer des performances suffisantes d'enregistrement/lecture par un changement approprié de la densité d'enregistrement de chaque couche d'enregistrement même si de multiples couches d'enregistrement sont laminées pour un disque optique ayant, par exemple, une couche guide et des couches d'enregistrement.
PCT/JP2011/005235 2011-09-16 2011-09-16 Disque optique et dispositif pour disque optique WO2013038457A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2015037062A1 (ja) * 2013-09-10 2017-03-02 株式会社東芝 記録再生装置

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JPH11232700A (ja) * 1998-02-09 1999-08-27 Sony Corp 光学記録媒体と、光学記録媒体の製造方法
JP2007048404A (ja) * 2005-08-12 2007-02-22 Pioneer Electronic Corp 情報記録媒体、情報処理装置及び方法、並びに、記録又は再生を行う処理制御用のコンピュータプログラム
WO2007055107A1 (fr) * 2005-11-11 2007-05-18 Pioneer Corporation Disque multicouches et son dispositif d'enregistrement/reproduction d'information
JP2010086596A (ja) * 2008-09-30 2010-04-15 Hitachi Ltd 光ディスク、光ディスク記録再生装置および情報記録再生方法
JP2011108318A (ja) * 2009-11-17 2011-06-02 Renesas Electronics Corp 光記録媒体、光記録媒体再生装置、及び光記録媒体記録装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232700A (ja) * 1998-02-09 1999-08-27 Sony Corp 光学記録媒体と、光学記録媒体の製造方法
JP2007048404A (ja) * 2005-08-12 2007-02-22 Pioneer Electronic Corp 情報記録媒体、情報処理装置及び方法、並びに、記録又は再生を行う処理制御用のコンピュータプログラム
WO2007055107A1 (fr) * 2005-11-11 2007-05-18 Pioneer Corporation Disque multicouches et son dispositif d'enregistrement/reproduction d'information
JP2010086596A (ja) * 2008-09-30 2010-04-15 Hitachi Ltd 光ディスク、光ディスク記録再生装置および情報記録再生方法
JP2011108318A (ja) * 2009-11-17 2011-06-02 Renesas Electronics Corp 光記録媒体、光記録媒体再生装置、及び光記録媒体記録装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2015037062A1 (ja) * 2013-09-10 2017-03-02 株式会社東芝 記録再生装置

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