WO2007015299A1 - 光情報記録再生装置および光情報記録媒体 - Google Patents
光情報記録再生装置および光情報記録媒体 Download PDFInfo
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- WO2007015299A1 WO2007015299A1 PCT/JP2005/014229 JP2005014229W WO2007015299A1 WO 2007015299 A1 WO2007015299 A1 WO 2007015299A1 JP 2005014229 W JP2005014229 W JP 2005014229W WO 2007015299 A1 WO2007015299 A1 WO 2007015299A1
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- information
- recording
- recording layer
- recorded
- optical
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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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/0079—Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
- G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
- G11B20/00231—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is obtained from a local external medium, e.g. a card
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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
- 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/213—Read-only discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
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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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
Definitions
- the present invention relates to an optical information recording / reproducing apparatus that records or reproduces information on an optical information recording medium by irradiating a light beam onto the optical information recording medium, and more particularly to identification information for identifying a user.
- the present invention relates to an optical information recording / reproducing apparatus and an optical information recording medium that can prevent falsification and the like and can efficiently change the identification information by a legitimate user.
- removable media and drives devices for recording information on removable media and playing information stored on Z or removable media
- hybrid type removable media such as concurrent ROMRAM (see, for example, Patent Document 1) and partial ROM, which have a ROM (Read Only Memory) part that cannot be added and a RAM (Random Access Memory) part that can be added, and those A drive corresponding to other removable media is proposed.
- Patent Document 1 JP-A-6-202820
- Patent Document 2 JP 2003-36595 A
- Patent Document 3 Japanese Unexamined Patent Publication No. 2003-115163
- the ROM area and the RAM area held by the concurrent ROMRAM described above have only one layer, when there are a plurality of identification information recorded in the ROM layer, the identification information is included in the identification information.
- the information management of the corresponding RAM area becomes complicated, In addition, there is a problem that the recording capacity available to the user is greatly reduced.
- the present invention has been made in view of the above, and prevents alteration of identification information recorded in a ROM area or the like and efficiently changes the identification information by a legitimate user. It is an object of the present invention to provide an optical information recording / reproducing apparatus and an optical information recording medium.
- the present invention records a first recording layer for recording information and information corresponding to the information recorded in the first recording layer
- An optical information recording / reproducing apparatus for irradiating a light beam to an optical information recording medium having a second recording layer to record or reproduce information on the optical information recording medium, wherein the optical information recording medium
- An information acquisition unit that collectively acquires information recorded by causing the bundle to interfere and information recorded in the second recording layer corresponding to the information recorded in the first recording layer; It is characterized by that.
- the present invention provides the above-described invention, wherein the second recording layer records restriction information including information for restricting access to information recorded on the first recording layer, Based on the restriction information, write determination means for determining whether or not information is written to the first recording layer, and based on the determination result of the write determination means, the restriction information is adapted to correspond to the restriction information. And a writing means for writing information to the first recording layer.
- the information recorded in the first recording layer corresponding to the restriction information is based on the restriction information recorded in the second recording layer. It is further characterized by further comprising a reading determination means for determining whether or not the power to permit reading is acceptable.
- the restriction information recorded on the second recording layer includes first restriction information that cannot be rewritten and second restriction information that can be rewritten. Whether or not to rewrite the second restriction information based on the first control information when a rewrite request for the second restriction information recorded in the second recording layer is acquired. It further comprises a rewrite determination unit for determining, and a restriction information rewriting unit for rewriting the second restriction information based on a determination result of the rewrite determination unit. [0015] Further, the present invention is the above-described invention, further comprising output means for outputting only the information of the first recording layer when an information read request for the optical information recording medium is received.
- the present invention further includes date / time information acquisition means for acquiring current date / time information, wherein the restriction information further includes date / time information, and the write determination means includes: The date and time information acquired by the date and time information acquisition means and the date and time information of the restriction information are further compared to determine whether or not to permit writing of information to the first recording layer.
- the present invention further includes date and time information acquisition means for acquiring current date and time information
- the restriction information further includes date and time information
- the reading determination means includes The date and time information acquired by the date and time information acquisition means and the date and time information of the restriction information are further compared to determine whether or not to permit reading of information to the first recording layer in the previous period.
- the optical information recording medium corresponds to the first recording layer for recording the information and the information recorded in the first recording layer, and the first recording layer And a second recording layer that records the information to be accessed in a lump together with the recorded information and is located at a predetermined interval from the first recording layer.
- the second recording layer records restriction information including information for restricting access to information recorded in the first recording layer. It is characterized by.
- the present invention is characterized in that, in the above-described invention, information is recorded on the first recording layer by a hologram.
- the present invention provides the information recorded on the first recording layer in the above-described invention.
- Each restriction information recorded in the second recording layer has a one-to-one correspondence.
- the present invention provides the first recording layer and Z or the first
- the second recording layer is characterized in that a plurality of recording layers exist.
- the present invention is the above-described invention, wherein the second recording layer is the first recording layer. Further, address information for specifying the position of the information recorded in is further recorded.
- the present invention corresponds to the address information in the recording area of the second recording layer that is collectively accessed with the address information recorded on the first recording layer in the above-described invention. It is characterized by recording information.
- the present invention is characterized in that, in the above-described invention, the restriction information recorded in the second recording layer is recorded in a non-rewritable area.
- the restriction information includes first restriction information and second restriction information, and the first restriction information is not rewritable on the second recording layer. It is recorded in a possible area, and the second restriction information is recorded in the second rewritable area.
- the present invention is characterized in that the second recording layer further records date information.
- the present invention is characterized in that, in the above-described invention, the first recording layer is formed of a homogeneous recording material.
- the present invention is the above-described invention, further comprising a polarizing element layer between the first recording layer and the second recording layer, wherein the polarizing element layer has a different polarization state.
- the luminous flux accessing the first recording layer and the luminous flux accessing the second recording layer the luminous flux accessing the first recording layer is blocked.
- the optical information recording / reproducing apparatus records the first recording layer for recording information by causing the light beam to interfere, and information corresponding to the information recorded in the first recording layer.
- the optical information recording medium having the second recording layer is irradiated with a light beam, and the information recorded in the first recording layer and the second recording layer is read at a time. Can access information on two recording layers.
- the optical information recording / reproducing apparatus records the restriction information including information for restricting access to the information recorded in the first recording layer on the second recording layer. Therefore, based on this restriction information, it is determined whether or not writing to the first recording layer is permitted, and information is written to the first recording layer based on the determination result. Record It is possible to prevent falsification of the information and improve the reliability.
- the optical information recording / reproducing apparatus records the restriction information including information for restricting access to the information recorded on the first recording layer, on the second recording layer. Therefore, since it is determined whether or not the information recorded on the first recording layer can be read based on the restriction information, the reliability of the information recorded on the first recording layer can be improved. .
- the optical information recording / reproducing apparatus includes the first restriction information (recorded in a non-rewritable area) included in the restriction information. Since it is determined whether or not the second restriction information (recorded in the rewritable area) can be rewritten, the second restriction information is rewritten based on the determination result. Can be rewritten smoothly.
- the optical information recording / reproducing apparatus outputs only the information related to the first recording layer when receiving the information reading request for the optical information recording medium. Reliability for the recording / reproducing apparatus can be improved.
- the optical information recording / reproducing apparatus acquires date / time information, and whether to write information to the first recording layer based on the acquired date / time information and restriction information. Since the information is written to the first recording layer, the reliability of the information recorded on the first recording layer can be further improved.
- the optical information recording / reproducing apparatus acquires date / time information, and determines whether or not to read information into the first recording layer based on the acquired date / time information and restriction information. Therefore, the reliability of the information recorded on the first recording layer can be further improved.
- the optical information recording medium corresponds to the first recording layer for recording information and the information recorded in the first recording layer, and is recorded in the first recording layer. Recorded information and the information to be accessed in a lump and have a second recording layer located at a predetermined interval from the first recording layer.
- the optical information recording medium records restriction information including information for restricting access to information recorded in the first recording layer in the second storage layer. Do Can restrict unauthorized access to the information recorded in the first recording layer.
- the optical information recording medium records information on the first recording layer by means of a hologram, so that the recording density can be improved.
- the optical information recording medium has a one-to-one correspondence between each piece of information recorded on the first recording layer and each piece of restriction information recorded on the second recording layer. Therefore, it is possible to efficiently restrict access to information recorded on the first recording layer.
- the optical information recording medium includes a plurality of first recording layers and second recording layers, the recording density can be improved.
- the optical information recording medium records the address information corresponding to the information recorded on the first recording layer on the second recording layer, so that it is recorded on the first recording layer.
- the recorded information can be accessed efficiently.
- the optical information recording medium corresponds to the address information in the storage area of the first recording layer that is collectively accessed with the address information recorded in the second recording layer. Since the information to be recorded is recorded, the waste of the first recording layer can be reduced.
- the optical information recording medium records the restriction information recorded on the second recording layer in a non-rewritable area, so that the information recorded on the first recording layer is recorded. Reliability can be improved.
- the optical information recording medium can record the first restriction information included in the restriction information in a non-rewritable area and rewrite the second restriction information included in the restriction information. Since the data is recorded in a safe area, a legitimate administrator can rewrite the restriction information smoothly.
- the optical information recording medium further records the date and time information on the second recording layer, so that the reliability of the information recorded on the first recording layer can be improved.
- the optical information recording medium since the optical information recording medium has the first recording layer formed of the same quality recording material, information can be appropriately recorded on the first recording layer.
- the optical information recording medium is provided between the first recording layer and the second recording layer. Since a polarizing element is provided and the light beam for recording on the first recording layer is blocked by this polarizing element, information can be efficiently recorded on each recording layer.
- FIG. 1 is a diagram illustrating a spatial light modulation element provided in an optical information recording apparatus that generates recording light and reference light.
- FIG. 2 is a diagram showing a modulation state of light intensity of a light beam passing through a plurality of segments of the spatial light modulation element shown in FIG.
- FIG. 3 is a diagram for explaining the principle of optical information recording processing according to the present invention.
- FIG. 4 is a diagram for explaining the configuration of the spatial light modulation element shown in FIG. 1.
- FIG. 5 is a diagram for explaining the configuration of an optical phase correction element.
- Fig. 6-1 is a diagram showing the state of liquid crystal molecules when the optical phase correction element is in the OFF state.
- Fig. 6-2 shows the state of liquid crystal molecules when the optical phase correction element is in the ON state.
- FIG. 7 is a diagram showing the relationship between the applied voltage applied to the spatial light intensity modulation element and the light transmittance.
- FIG. 8 is a functional block diagram showing the configuration of the optical information recording / reproducing apparatus in the example.
- FIG. 9 is a functional block diagram showing an example of the configuration of the optical pickup unit.
- FIG. 10 is a diagram showing a configuration of the conjugate focal point conversion lens shown in FIG.
- FIG. 11 shows the configuration of the optical information recording medium according to this example (address information and access restriction code are recorded in the optical information recording medium in advance as optical phase pits that cannot be rewritten! FIG.
- FIG. 12 is a diagram showing a configuration of an optical information recording medium (when an access restriction code is recorded in a rewritable area in the optical information recording medium) according to the present embodiment.
- FIG. 13 is an explanatory diagram (1) for explaining the relationship between a light beam and each part constituting the optical information recording medium.
- FIG. 14 is a diagram for explaining the relationship between the luminous flux and each part constituting the optical information recording medium. It is explanatory drawing (2).
- FIG. 15 is a diagram showing an example of the IC card shown in FIG. 8.
- FIG. 16-1 is an explanatory diagram (1) for explaining the relationship between an access restriction code or the like recorded in the ROM information layer and user data recorded in the RAM information layer.
- FIG. 16-2 is an explanatory diagram (2) for explaining the relationship between the access restriction code and the like recorded in the ROM information layer and the user data recorded in the RAM information layer.
- FIG. 16-3 is an explanatory diagram (3) for explaining the relationship between the access restriction code recorded in the ROM information layer and the user data recorded in the RAM information layer.
- Figure 17 shows the case where there are multiple ROM information layers in the depth direction of the optical information recording medium.
- FIG. 4 is an explanatory diagram for explaining a correspondence relationship between a ROM information layer and a RAM information layer.
- FIG. 18 is a diagram showing a configuration of a card-type optical information recording medium.
- the optical information recording medium which is useful in this embodiment has a ROM area composed of a ROM (Read Only Memory) information layer and a RAM area composed of a RAM (Random Access Memory) information layer.
- ROM Read Only Memory
- RAM Random Access Memory
- reading and Z or writing of information is controlled.
- Limited access restriction code is recorded.
- the optical information recording / reproducing apparatus reads or writes information in the RAM area, it restricts reading and writing of information based on the access restriction code in the ROM area corresponding to this information, and Only the existence of the RAM information layer area is notified to the computer.
- the ROM information layer holds a rewritable or writable area (hereinafter abbreviated as a rewritable area), and management is performed when the optical information recording / reproducing apparatus writes information in the rewritable area.
- the key unique code of an IC (Integrated Circuit) card owned by the user and the access restriction code recorded in the ROM information layer are compared and collated, and information writing to the rewritable area of the ROM information layer is restricted.
- FIG. 1 is a diagram illustrating a spatial light modulation element 10 provided in an optical information recording apparatus that generates recording light and reference light. As shown in FIG. 1, the spatial light modulation element 10 has a segment 11 and a segment boundary 12. FIG. 1 also shows the relationship between the spatial light modulator 10 and the collimator lens aperture 13 that converges the light beam on the spatial light modulator 10.
- Each segment 11 is separated by a segment boundary 12. Since the spatial light modulator 10 is formed of a liquid crystal element or an electro-optical element whose refractive index anisotropy changes electrically, applying a voltage to each segment 11 causes each segment 11 to transmit light. The state changes to ON segment 14 where the intensity of reflected light is high, or OFF segment 15 where the intensity of transmitted light or reflected light is low (not 0).
- FIG. 2 is a diagram showing a modulation state of the light intensity of the light beam passing through the plurality of segments 11 of the spatial light modulation element 10 shown in FIG.
- the applied voltage for generating the recording signal light is A
- the applied voltage for generating the reference light is B (B> A)
- the applied voltages A and B are applied to each segment 11.
- the recording signal light and the reference light are generated in a superposed state by transmitting the laser light serving as the light source through the spatial light modulator 10.
- the recording signal light and the reference light are applied to the optical information recording medium, and an interference pattern is generated in the recording layer in the optical information recording medium to record the optical information.
- the light beam generated using the spatial light modulator 10 is based on the principle described below, and the entire surface of the light beam is reference light, and the entire surface is recording signal light that can be modulated in light intensity according to the recording information.
- the light beam is diffracted and interfered in the recording layer of the optical information recording medium in the vicinity of the focal point of the objective lens that converges the light beam, and a diffraction interference pattern in which the reference light and the recording signal light are diffracted and interfered three-dimensionally is recorded. Is done.
- the interference pattern generated by the light flux (light intensity components a, b, c, d, e, f, g and h) transmitted through each segment 11 is the reference light (light intensity component P).
- the diffraction interference pattern generated from the recording signal light (light intensity components q, r and s).
- the light intensity component of each segment 11 of the spatial light modulator 10 is independently Fourier-transformed in the integration region of each light intensity component, and these are added together to obtain the total segment 11
- the diffraction interference pattern in the example of FIG. 3 can be expressed as follows from the fact that it is equal to the Fourier transform of the light intensity component in the entire integration region and the linearity in the Fourier transform.
- F (x) is the Fourier transform of the light intensity component x. Also, here, to keep things simple,
- the diffraction effect is small at a portion far away from the focal force, and the intensity of the diffraction interference pattern is extremely weak because the light density is low. Due to the relationship with the sensitivity of the recording material, the diffraction interference only near the convergence point. The pattern is recorded.
- FIG. 4 is a diagram for explaining the configuration of the spatial light modulator 10 shown in FIG.
- the recording signal and the reference light are generated by allowing the light beam to pass through the spatial light intensity modulation element 20 and the optical phase correction element 21 bonded together.
- the spatial light intensity modulation element 20 is formed of a TN (Twisted Nematic) type liquid crystal element.
- the optical phase correction element 21 is constituted by a TFT (Thin Film Transistor) type liquid crystal element.
- TFT Thin Film Transistor
- the spatial light intensity modulation element 20 and the optical phase correction element 21 are divided into segments 11 by segment boundaries 12 as shown in FIG.
- Each segment 11 of the correction element 21 is arranged so as to share a region through which the light flux is transmitted.
- the spatial light intensity modulation element 20 is an element that modulates the light intensity of a transmitted light beam. This sky There is no problem when the inter-light intensity modulation element 20 modulates only the light intensity of the light beam, but in the case of an optical element such as a liquid crystal element utilizing the anisotropy of the refractive index of the substance, the optical phase always changes. End up.
- a segment that generates recording signal light is arranged in the center of the spatial light intensity modulation element, and a segment that generates reference light is arranged around it, and a segment that generates recording signal light is referred to.
- the light generating segment is completely independent, there is no problem even if the optical phase changes when modulating the light intensity, but the segment area that generates the recording signal light is reduced. The recording density of the recording medium is reduced.
- the optical phase correction element 21 is used to correct the change in the optical phase caused by the light beam passing through the spatial light intensity modulation element 20. Specifically, since the optical phase changes according to the voltage applied to the spatial light intensity modulation element 20, the optical phase correction element 21 is the laser power of the laser irradiated to the spatial light intensity modulation element 20 during information recording. The optical phase is corrected in accordance with the optical phase characteristics of the spatial light intensity modulation element 20 when the is changed.
- This optical phase correction is performed by examining the optical phase characteristics with respect to the applied voltages of the spatial light intensity modulation element 20 and the optical phase correction element 21 in advance before incorporation into the optical information recording / reproducing apparatus, and information on the optical phase characteristics. Can be recorded in a memory provided in the optical information recording / reproducing apparatus, read out and used.
- FIG. 5 is a diagram for explaining the configuration of the optical phase correction element 21.
- the optical phase correction element 21 includes a polarizing plate 30, a glass substrate 31, a liquid crystal 32, a glass substrate 33 and a polarizing plate 34.
- the polarization state of the light beam transmitted through the TN-type liquid crystal element which is the spatial light intensity modulation element 20 is linearly polarized light, and the light beam transmitted through the polarizing plate 30 bonded to the glass substrate 31 in the polarization direction of this linearly polarized light.
- the axes are consistent.
- a matrix TFT segment 3 la that is a matrix segment for TFT driving is formed on the glass substrate 31.
- a polarizing plate 34 is bonded to the glass substrate 33, and the direction of the light transmission axis of the polarizing plate 34 coincides with the direction of the light transmission axis of the polarizing plate 30.
- a TFT counter electrode 33 a that is a counter electrode of the matrix TFT segment 3 la formed on the glass substrate 31 is formed on the glass substrate 33. Further, the inner surfaces of the glass substrate 31 and the glass substrate 33 are subjected to an alignment film treatment in which an alignment agent such as polyimide is rubbed, so that liquid crystal molecules are aligned with the light transmission axes of the polarizing plates 30 and 34. Oriented to match.
- the liquid crystal molecules are TFT-driven in the unit of a matrix segment, so that the liquid crystal molecules can be tilted in a state where the liquid crystal molecules are aligned in one direction.
- the optical phase of the light beam transmitted through the optical phase correction element 21 can be freely adjusted from the relationship between the refractive index anisotropy and the optical phase, and the spatial light intensity modulation element 20 It is possible to correct the optical phase shift caused by modulating the.
- FIG. 6-1 is a diagram showing the state of liquid crystal molecules when the optical phase correction element 21 is in the OFF state
- FIG. 6-2 is a diagram when the optical phase correction element 21 is in the ON state. It is a figure which shows the state of a liquid crystal molecule.
- the optical phase correction element 21 when the optical phase correction element 21 is in the ON state, that is, when a voltage is applied to the segment of the optical phase correction element 21, the alignment direction of the liquid crystal molecules 35 is changed.
- the refractive index anisotropy changes accordingly. In this way, the optical phase shift of the light beam can be corrected by changing the refractive index anisotropy.
- each segment of the spatial light intensity modulation element 20 and each segment of the optical phase correction element 21 are arranged vertically so as to correspond one-to-one. Since the light intensity modulation is performed according to the recorded information, each segment of the spatial light intensity modulation element 20 is turned on or off. The segment of the optical phase correction element 21 corresponding to each segment is turned ON or OFF in synchronization with being turned on, so that the optical phase of the light beam transmitted through the optical phase correction element 21 is constant over the entire surface. To be controlled.
- FIG. 7 is a diagram showing the relationship between the applied voltage applied to the spatial light intensity modulation element 20 and the light transmittance.
- the transmittance power of the light flux of the segment that generates the recording signal light is larger than the transmittance of the light flux of the segment that generates the reference light.
- a voltage A smaller than the voltage B applied to the segment that generates the reference light is applied to the segment that generates the recording signal light so as to increase.
- FIG. 8 is a functional block diagram showing the configuration of an optical information recording / reproducing apparatus that is useful in this embodiment.
- this optical information recording / reproducing apparatus comprises optical beep-up units 100 and 200, laser power monitor control units 110 and 210, objective lens optical head position control units 120 and 220, ROM information data Separator 130, 230, Servo signal detector 140, 240, Address information detector 150, 250, Access restriction code data detector 160, 260, Spatial light modulation element 270, RAM information layer data detector 280, controller 300, access restriction code data generation unit 310, comparison unit 320, key unique code detection unit 330, and clock 350.
- a user identifier 1 which is an access restriction code is recorded in the form of an optical phase pit.
- the IC card 340 is connected to the key unique card detecting unit 330.
- Key unique code detection unit Passes the key unique code of the ic card 340 to the comparison unit 320.
- the access restriction code is information for restricting access to information recorded in the ROM information layer or the RAM information layer.
- Comparison unit 320 compares the key unique code of IC card 340 with the user identifier 1 of the ROM information layer, and when comparison unit 320 determines that this key unique code is appropriate (ROM information The administrator can access the ROM information layer.
- the user identifier 1 consisting of optical phase pits is recorded in the lead-in area that is the ROM information layer of the optical information recording medium 50, and the optical information recording medium 50 is used as the optical information recording / reproducing device.
- the optical information recording / reproducing apparatus reads user identifier 1 and compares the key unique code of the IC card 340 with the user identifier.
- the user identifier 1 recorded for each address may be compared with the key unique code of the IC card 340 for each address.
- comparison unit 320 user identifier 1 and key unique code are compared and collated, but user identifier 1 consisting of an optical phase pit recorded in advance in the ROM information layer is stored in the rewritable area as an access restriction code.
- user identifier 1 consisting of an optical phase pit recorded in advance in the ROM information layer is stored in the rewritable area as an access restriction code.
- the comparison unit 320 verifies that the key unique code of the IC card 340 includes a code corresponding to the authority to record the access restriction code, By inputting a predetermined recording command, the optical pickup unit 100 can be controlled and processed.
- the controller 300 performs the optical information recording.
- the host computer 400 is notified of a signal notifying only the presence of the RAM area which is the RAM information layer made up of the recording layer of the medium 50, and the recording command for the ROM information layer is not effective.
- the explanation is given only when the right to record the access restriction code is granted.
- the controller 300 receives a new access restriction code and digital from the host computer 400. Data is acquired and information is recorded on or reproduced from the optical information recording medium 50. The controller 300 passes the data related to the access restriction code among the data acquired from the host computer 400 to the access restriction code data generation unit 310, and the access restriction code data generation unit 310 supplies the data of the access restriction code to a predetermined value. Convert to the other recording format.
- the controller 300 accesses the ROM information layer of the optical information recording medium 50, the controller 300 issues a command to the objective lens optical head position controller 120, and the objective lens / optical head position controller 120 force By controlling the optical pickup unit 100 and its objective lens, the controller 300 accesses a desired address on the ROM information layer.
- the focus and track positions are controlled by the servo signal detection unit 140 and address information and access restriction code information are input from the optical pickup unit 100 to the ROM information data dividing unit 130.
- ROM information data division unit 130 divides address information and access restriction code information, passes the address information to address information detection unit 150, and passes the access restriction code to access restriction code data detection unit 160.
- the access restriction code detection unit 160 also detects the access restriction code by the information ability of the access restriction code, and passes the detected access restriction code to the controller 300.
- Address information detection section 150 detects the destination address of the light flux based on the address information, and passes the detected address to controller 300. Then, the controller 300 determines whether or not the address detected by the address information detection unit 150 is correct, that is, whether or not the light beam emitted from the optical pickup unit 100 has converged at an appropriate position on the optical information recording medium 50. If the address is incorrect, an instruction is sent to the objective lens' optical head position control unit 120 to correct the position of the objective lens.
- the laser power monitor control unit 110 monitors the laser power of the long-wavelength laser emitted from the optical pickup unit 100, and supplies a predetermined laser power according to the access time, reproduction time, and recording time to the optical pickup unit 100. To supply.
- the access restriction code data detection unit 160 when referring to an access restriction code already recorded in the ROM information layer, the access restriction code data detection unit 160 generates various restriction codes, and the generated various restriction codes are output by the controller 300 to a display or the like held by the host computer 400.
- the optical information recording / reproducing device records information such as an access restriction code in the rewritable area of the ROM information layer according to a recording instruction from the host computer 400, a new access restriction converted into a predetermined recording format is used.
- the controller 300 acquires the code from the access restriction code data generation unit 310.
- the controller 300 passes the access restriction code to the laser power monitor control unit 110 and instructs the objective lens-optical head position control unit 120 so that the light beam converges at a predetermined position on the optical information recording medium. put out.
- the laser power monitor control unit 110 generates a recording pulse according to the recording format of the access restriction code, and sequentially records the access restriction code in the designated rewritable area.
- the controller 300 acquires the reproduction data detected by the access restriction code data detection unit 160 and detects the error held by the controller 300. Judge by correction function. Specifically, the controller 300 goes through a verification process for determining OK or NG regarding the quality of the reproduction data detected by the access restriction code data detection unit 160. Record the access restriction code again in a rewritable area at another address.
- the optical pickup unit 200 will be described on the assumption that the comparison / collation between the key unique code of the IC card 340 and the user identifier 1 recorded in the ROM information layer has been completed.
- the optical information recording / reproducing apparatus accesses the recording layer which is the RAM information layer of the optical information recording medium 50 and records information, the recording data (video, Data, such as images and music) and data recording on the optical information recording medium 50 is managed. If there is data that needs data conversion among various data acquired from the host computer 400, the data conversion is performed by a coding unit such as a dedicated hardware or software application (not shown).
- the controller 300 issues an instruction to the objective lens / optical head position control unit 220 in order to access the ROM information layer that holds the recording control information of the recording layer to be recorded or reproduced.
- the optical pickup unit 200 and its objective lens are controlled to access an address on a desired ROM information layer. At this time, focus and track position control is performed by the objective lens optical head position control unit 220.
- the ROM information data separation unit 230 acquires address information and access restriction code information from the optical pickup unit 200, and divides the address information and access restriction code information. Then, the ROM information data division unit 230 passes the address information to the address information detection unit 250 and passes the access restriction code information to the access restriction code data detection unit 260.
- Address information detection section 150 detects the destination address of the light flux based on the address information, and passes the detected address to controller 300. Then, the controller 300 determines whether or not the address detected by the address information detection unit 250 is correct, that is, whether or not the light beam emitted from the optical pickup unit 100 has converged at an appropriate position on the optical information recording medium 50. If the address is wrong, an instruction is sent to the objective lens' optical head position control unit 220 to correct the position of the objective lens.
- the laser power monitor control unit 210 monitors the laser power of the laser emitted from the optical pickup unit 200, and applies a predetermined laser power to the optical pickup unit according to access, playback, and recording. Supply to 200.
- the controller 300 acquires data to be recorded in the RAM information layer from the host computer 400.
- the controller 300 uses the data acquired from the host computer 400. It has a coding function for converting into page data to be recorded in the RAM information layer.
- the controller 300 starts coding in units of pages in accordance with an instruction from the host computer 400, and the coded page data is transmitted to the spatial light modulator driving control unit 270.
- the objective lens / optical head position control unit 220 uses the address detected by the address information detection unit 250, but controls and records the optical pickup unit 200 and the objective lens. Transition from the standby state to the recording start state.
- the laser power monitor control unit 210 raises the laser power of the optical pickup unit 200 to a recording level as a pulse output.
- the spatial light modulation element drive control unit 270 changes the transmittance of each segment of the spatial light modulation element of the optical pickup unit 200 and records information corresponding to the page data on the recording layer. The reference light and the recording signal light are generated.
- the laser power monitor control unit 210 increases the laser power
- the power for simultaneously increasing the S-polarized server control beam is also obtained by using the optical pickup unit 200 used in this example for the spatial light corresponding to the S-polarized portion.
- the central portion of the intensity modulation element 20 is integrally adjusted for light intensity. Therefore, the spatial light modulation element drive control unit 270 controls the central portion of the spatial light intensity modulation element 20 so as to lower the transmittance in accordance with the rise timing of the laser power, so that the laser power required for servo control is minimized. It is adjusted so that
- the spatial light modulation element drive control unit 270 controls the transmittance of the spatial light intensity modulation element 20 to be minimum (substantially zero), Minimizing unnecessary influence on the recording layer of the optical information recording medium.
- the user who performs the recording action is limited by various codes in the information recording on the RAM information layer. That is, it is assumed that the key unique code recorded in the IC card 340 and the access restriction code recorded in the ROM information layer are compared and collated. However, further utilization of the clock 350 can further improve the reliability of information for the RAM information layer.
- the key unique code recorded on the IC card 340 and the clock 350 are taken.
- This access restriction code includes the code of the date and time when recording is permitted.
- the watch 350 is preferably a radio-controlled watch that cannot be tampered with from the outside.
- the controller 300 When the host computer 400 specifies a file to be accessed, the controller 300 starts access to the optical information recording medium 50. When the controller 300 starts the access operation, it issues a command to the objective lens'optical head position control unit 220 to control the optical pickup unit 200 and its objective lens. Then, the ROM information layer address corresponding to the RAM area in which the information to be reproduced is recorded is accessed.
- the servo signal detection unit 240 controls the focus and track positions, and inputs the address information and the information power of the access restriction code from the optical pickup unit 200 to the ROM information data division unit 230. .
- ROM information data division unit 230 divides address information and access restriction code information, passes the address information to address information detection unit 250, and passes the access restriction code to access restriction code data detection unit 260.
- the address detection unit 250 detects the destination address of the light flux based on the address information, and passes the detected address to the controller 300. Then, the controller 300 determines whether or not the address detected by the address information detection unit 150 is correct, that is, the force that the light beam emitted from the optical pickup unit 100 converges at an appropriate position on the optical information recording medium 50. If the address is wrong, an instruction is sent to the objective lens optical head position control unit 220 to correct the objective lens position and the like.
- Access restriction code data detection section 260 detects the access restriction code recorded in the ROM information layer. This detected access restriction code includes user identifier 1 and user Identifier 2 is included. When reproducing the information recorded in the RAM information layer, the user identifier 1 is compared and collated with the key unique code of the IC card 340 (code corresponding to the user identifier 1 of the key unique code) by the comparison unit 320.
- the controller 300 only searches the host computer 400 for the information (file) recorded in the RAM information layer. to approve.
- the comparison unit 320 compares the user identifier 2 with the key unique code (a code corresponding to the user identifier 2 of the key unique code), and only when the codes match, the comparison from the host computer 400 is performed. Allow access to the file.
- the user identifier 2 is recorded in the rewritable area of the ROM information layer, and is recorded in the ROM information layer positioned in the depth direction of the RAM information layer so as to correspond to the information recorded in the RAM information layer.
- the controller 300 After the comparison and verification of the user identifier 2 by the comparison unit 320, when the access permission signal is transmitted from the comparison unit 320 to the controller 300, the controller 300 sends the objective lens to the optical head position control unit 220. Instructs trace of page data group to be read file.
- the controller 300 instructs the spatial light modulation element drive control unit 270 to output the reference light adjusted to the reproduction level, and the laser power monitor control unit 210
- the laser power of the reference light emitted from the unit 200 is monitored, and the information recorded in the RAM information layer is sequentially detected in page data units.
- the controller 300 causes the RAM information layer data detection unit 280 to sequentially transmit the page data as the target file to the controller 300, and after decoding, transmits the decoded data to the host computer 400. Display the file on the display of the host computer 400.
- the comparison unit 320 uses each access restriction code (user identifier 1, user identifier 2, etc.) recorded in the ROM information layer and the IC card 340. Compared with the key unique code, and if each code matches, the RAM information layer Allow information recording. Therefore, when information is recorded in the RAM information layer, the head address power that becomes the recording start position after comparison with each access restriction code recorded in the ROM area layer corresponding to the area in which information is recorded is actually Recording starts.
- each access restriction code user identifier 1, user identifier 2, etc.
- the optical information recording / reproducing apparatus of the present embodiment uses a spatial light modulation element that does not modulate the recording signal light by a single laser light source for recording in the RAM information layer, and for each segment.
- the part corresponding to the position of the servo control beam, which is the S-polarized component, for adjusting the recording signal light is not divided into segments and is integrated in a circular shape, so it is the same as with a normal DVD or CD It is possible to always detect data recorded in the ROM information layer.
- the user identifier 1, user identifier 2, and date which are access restriction codes, are compared and collated again. Can record while
- FIG. 9 is a functional block diagram showing an example of the configuration of the optical pick-up unit 100.
- the optical pickup unit 100 includes a short wavelength laser 40, a collimator lens 41, a 1Z2 wavelength plate 42, a spatial light intensity modulation element 20, an optical phase correction element 21, and a polarization conversion.
- Element 43, conjugate focus conversion lens 44, half mirror cube 45, polarizing beam splitter 46, objective lens 47, polarizer 48, converging lens 49, pinhole 51, magnifying lens 52, CMOS A sensor 53, a detection lens 54, and a photodetector 55 are included.
- the short wavelength laser 40 emits a light beam having a light intensity adjusted for recording or reproducing information.
- the adjustment of the light intensity is performed by a laser power monitor control unit 210 controlled by the controller 300.
- the light beam when the light beam is emitted from the short wavelength laser 40, the light beam is transmitted through the collimator lens 41 and converted to a P-polarized light beam by the 1Z2 wavelength plate. Then, the P-polarized light beam enters the spatial light intensity modulation element 20 and the optical phase correction element 21, and the spatial light intensity modulation element 20 and the optical phase correction element 21 cause the P-polarized recording signal light and the reference. Converted to light.
- the polarization conversion element 43 is, for example, a 1Z2 wavelength plate, an optical rotation plate, or the like, and is converted so that the polarization direction of the light beam is orthogonal before and after passing through the polarization converter 43. That is, the polarization state of the light beam that passes through the portion around the polarization conversion element 43 remains P-polarized light, and the polarization state of the light beam that passes through the portion of the polarization conversion element 43 is converted into S-polarized light.
- This S-polarized light beam is used as a servo-controlled light beam, and the polarization direction is orthogonal to the P-polarized light beam formed by the transmissive interference pattern, so there is no interaction.
- the P-polarized light beam passes through the half mirror cube 45, the polarizing beam splitter 46, and the objective lens 47, enters the optical information recording medium 50, and forms an interference pattern, thereby forming information on the optical information recording medium 50. Record.
- the polarization beam splitter 46 is configured such that the transmittance of the P-polarized light is set to 100%, the transmittance of the S-polarized light is set to 50%, and the reflectance of the S-polarized light is set to 50%.
- the optical information recording medium 50 When reproducing information recorded on the optical information recording medium 50, the optical information recording medium 50 is irradiated with a P-polarized light beam as reference light, and the light beam reflected by the optical information recording medium 50 is The light enters the CMOS sensor 53 through the objective lens 47, the polarizing beam splitter 46, the half mirror cube 45, the polarizer 48, the converging lens 49, the pinhole 51, and the magnifying lens 52. Thereafter, the light beam incident on the CMOS sensor 53 is converted into an electric signal, subjected to amplification processing and decoding processing, and information recorded on the optical information recording medium 50 is reproduced.
- the S-polarized light beam is converted into convergent light or divergent light by passing through the conjugate focal point conversion lens 44.
- the conjugate focal point conversion lens 44 will be described in detail later.
- the S-polarized light beam passes through the half mirror cube 45 and the polarization beam splitter 46, and on the optical information recording medium 50 different from the focal position of the P-polarized light beam by the action of the objective lens 47. Converge to position.
- the S-polarized light beam is reflected by the reflection layer existing in the optical information recording medium 50, passes through the objective lens 47, the polarization beam splitter 46, and the detection lens 54, and the address information is track error and focus. It is converted into an electrical signal by the photo detector 55 that detects servo information such as an error signal and information such as an access restriction code for the rewritable area. A detailed description of the access restriction code will be described later.
- the signal obtained by the photodetector 55 is transmitted to a controller that performs servo control of the objective lens 47.
- the position of the objective lens 47 is controlled based on that information.
- the light flux can be converged on a predetermined area of the optical information recording medium 50 by such control.
- FIG. 10 is a diagram illustrating a configuration of the conjugate focus conversion lens 44 illustrated in FIG.
- this conjugate focus conversion lens 44 includes a plurality of conjugate focus lenses, that is, in the case of FIG. 10, a first conjugate focus conversion lens 60 and a second conjugate focus conversion lens 61. .
- the conjugate conjugate conversion lens 44 is formed by embedding the first conjugate focal lens 60 and the second conjugate focal lens 61 in the transparent substrate 63 by integral molding.
- the conjugate focal point conversion lens 44 by moving the conjugate focal point conversion lens 44 to the left and right by a push-pull mechanism 62 using an electromagnetic plunger or the like, a portion of the transparent substrate 63 is placed on the optical path through which the S-polarized light flux passes, The first conjugate conversion lens 60 or the second conjugate conversion lens 61 is arranged.
- the first conjugate focus conversion lens 60 and the second conjugate focus conversion lens 61 are not provided, the transparent substrate 63 portion, the first conjugate focus conversion lens 60 and the surrounding transparent substrate 63 portion,
- the widths of the second conjugate focal point conversion lens 61 and the surrounding transparent substrate 63 are set to be equal to or larger than the light flux width of the collimator lens 41 shown in FIG.
- the S-polarized light beam is an optical information recording medium 50 on which address information, an access restriction code, etc. are recorded.
- the P-polarized light beam is controlled so as to form three transmission interference patterns in the depth direction of the recording layer of the optical information recording medium 50.
- FIG. 11 shows the configuration of an optical information recording medium that is useful in this embodiment (when address information and access restriction code are recorded in advance in the optical information recording medium as non-rewritable optical phase pits).
- FIG. 12 is a diagram showing a configuration of an optical information recording medium (when an access restriction code is recorded in a rewritable area in the optical information recording medium) according to the present embodiment.
- this optical information recording medium comprises a protective layer 501, a transparent substrate 502, a protective layer 5003, a recording layer 504, a protective image 505, a translucent reflective layer 506, a protective layer 507, and a translucent A reflective layer 508, a transparent reflective resin 509, a reflective layer 510, and a substrate 511 are included.
- the recording layer 504 is composed of a photopolymer that is a hologram recording material.
- the recording layer 504 has a three-dimensional region including a conjugate focal position where the irradiated recording signal light and reference light converge.
- a transmissive interference pattern is formed.
- the entire recording layer 504 is composed of a homogeneous photopolymer.
- the address information and the access restriction code force are recorded in advance as optical phase pits. Further, in the transparent resin 509, address information and an access restriction code are recorded in advance as optical phase bits by the 2P method.
- the optical information recording medium shown in FIG. 12 includes a protective layer 501, a transparent substrate 502, a protective layer 503, a recording layer 504, a protective layer 505, a translucent reflective layer 506, a protective layer 507, a transparent resin 509, A substrate 51 1 and access restriction code recording layers 512 and 513 are provided.
- the access restriction code recording layers 512 and 513 are made of, for example, a phase change recording material or a pigment-based write-once material, and an access restriction code is formed in the access restriction code recording layers 510 and 511. .
- the access restriction code recording layers 512 and 513 have the same effect as the semitransparent reflection layer, similar to the semitransparent reflection layer 506, but between the access restriction code recording layer 510 and the transparent resin 509. In the same way, a transmittance adjustment film made of metal or dielectric is formed, and similarly, between the access restriction code recording layer 512 and the substrate 511, adjustment of transmittance and reflectance made of metal or dielectric is performed. It is okay to make up a membrane.
- FIG. 13 is an explanatory diagram (1) for explaining the relationship between the luminous flux and each part constituting the optical information recording medium.
- FIG. 13 the relationship between the light beam and the components constituting the optical information recording medium when the transparent substrate 60 of the conjugate focal point conversion lens 44 described in FIG. 10 is flat will be described.
- the central part of the light beam incident on the objective lens 47 is the S-polarized light beam that becomes the servo control beam, and the annular part surrounding the central part is the P-polarized light beam that forms the transmission interference pattern. .
- the servo control beam accesses the ROM information layer (layer containing information such as address, authentication identifier and access restriction code) from the objective lens 47. Therefore, it is different whether it is close to the objective lens 47, accessing the ROM information layer.
- the ROM information layer layer containing information such as address, authentication identifier and access restriction code
- the transparent substrate 60 of the conjugate focal point conversion lens 44 through which the light beam passes is flat, the P-polarized component light beam and the S-polarized component light beam are only affected by the objective lens 47.
- 70% of the P-polarized light beam used as the reference method for forming the transmission interference pattern and the recording signal light is reflected by the translucent reflective layer 506, and the reflected light beam is diffracted by the recording layer 504. Then, the reference light and the recording signal light are diffracted and interfered to form a transmission type interference pattern in a three-dimensional region having a high light density, and information is recorded.
- the P-polarized light beam transmitted through the translucent reflective layer 506 is affected by the reflective action of the ROM information layer and is diffracted and reflected by the optical phase pit or guide track. Assuming that the reflectance of each layer is 40% and both side forces are transmitted and reflected only once, 3.6% from the ROM information layer on the objective lens 47 side, and 3. from the ROM information layer on the far side from the objective lens 47. Since it is about 24%, the light density of the reflected P-polarized light beam is extremely low in the recording layer 504, and the influence of the light beam reflected from each ROM information layer on the recording layer 504 is extremely small. .
- the reflected light of the optical information recording medium force is converged by the same converging lens 49. Since the convergence point of each reflected light is different, the pinhole 51 is used. By using this pinhole 51, it is possible to shield high-order diffracted light and remove noise during reproduction.
- the luminous flux of the S polarization component is address information consisting of optical phase pits, optical phase pit Or it converges on the ROM information layer where the access restriction code of the rewritable area is recorded and is reflected. Then, approximately 50% of the reflected light beam of the S-polarized component is reflected by the polarization beam splitter 46, reaches the detection lens 54 and the photodetector 50, and is converted into address information and an access restriction code.
- FIG. 14 is an explanatory diagram (2) for explaining the relationship between the light beam and each part constituting the optical information recording medium.
- FIG. 14 describes the relationship between the light beam and each part of the optical information recording medium when the light flux is transmitted through the concave lens acting part in the conjugate focal point conversion lens 44 shown in FIG.
- the central portion of the light beam incident on the objective lens 47 is the S-polarized component that becomes the servo control beam, and the annular portion surrounding the central portion is the light beam of the P-polarized component that forms the transmission interference pattern .
- the light beam passes through the concave lens portion of the conjugate focus conversion lens 44, so the focal position of the light beam of the S-polarized component is different from the focal position of the objective lens 47. It converges to a position farther than the focal position of the lens 47.
- the reference light for recording the transmission interference pattern and the P-polarized light beam that becomes the recording signal are diffracted and interfered in the recording layer 504 before reaching the translucent reflection layer 506.
- the pattern is recorded.
- the luminous flux after recording is reflected, for example, by 70% by the translucent reflective layer 506, and the luminous flux transmitted through the translucent reflective layer 506 is affected by the reflective action of the ROM information layer, and is subjected to optical phase pits or The force diffracted and reflected by the guide track
- the reflectance of each reflective layer of the ROM information layer is 40%, and it is transmitted and reflected from both sides only once. Therefore, the light density of the reflected P-polarized component in the recording layer 504 is 3.6% from the ROM layer and 3.24% from the ROM layer far from the objective lens 47. It becomes extremely low, and the influence of the constraint reflected from each ROM information layer on the recording layer 504 is extremely small.
- each reflected light of the optical information recording medium force is converged by the same converging lens 49. Since the convergence point of each reflected light is different, the pinhole 51 is used. By using this pinhole 51, it is possible to shield high-order diffracted light and remove noise during reproduction.
- the light beam of the S-polarized component converges and is reflected on the ROM information layer in which the address information including the optical phase pit, the optical phase pit, or the access restriction code of the rewritable area is recorded. Then, approximately 50% of the reflected light beam of the S-polarized component is reflected by the polarization beam splitter 46, reaches the detection lens 54 and the photodetector 50, and is converted into address information and an access restriction code.
- FIG. 15 is a diagram showing an example of the IC card 340 shown in FIG.
- a company code is included as user identifier 1
- a department code and a personal ID (I dentification) are included as user identifier 2.
- user identifier 1 includes a restriction code recording permission granting code for permitting access restriction code recording.
- the IC card shown in Example 1 cannot record the access restriction code in the rewritable area, but the IC card shown in Example 2 can record the access restriction code in the rewritable area.
- FIG. 16-1, FIG. 16-2, and FIG. 16-3 are explanatory diagrams for explaining the relationship between the access restriction code and the like recorded in the ROM information layer and the user data recorded in the RAM information layer. It is.
- user identifier 1 is pre-recorded as an optical phase pit following each address! /, But may be recorded in the ROM information layer of the lead-in area of optical information recording medium 50.
- the comparison collation with the user identifier following each address can be skipped.
- User identifier 2 and date code are recorded in the rewritable area. Note that the order of user identifier 2 and date code is not limited to the order shown in Figure 16-1, Figure 16-2, and Figure 16-3. [0172] Here, each page data is described independently. Each page data is recorded by shift multiplexing. Therefore, each page data may overlap depending on the multiplicity. Further, as shown in the figure, the recording sector of the RAM information layer coincides with the end position of the date code from the code start position of the user identifier 1 of the ROM information layer.
- address areas are recorded because bit-by-bit recording is performed by inducing a change in reflectivity in a minute area with a laser beam with a diameter of 1 ⁇ m or less focused on the diffraction limit. Is a wasteful area from the viewpoint of the recording area.
- the recording on the RAM information layer is a transmission interference pattern
- the transmission interference pattern recorded on the RAM information layer is at the diffraction limit. Compared to the narrowed beam, it is very large, about 100 m.
- each sector of the ROM information layer has a configuration in which the positional relationship between the virtual sector of the RAM information layer and the physical upper and lower sides is substantially the same.
- the end of the RAM information layer corresponding to the address area N substantially coincides with the end position of the address area N + 1.
- the recording sector start position of the RAM information layer corresponding to the address area N + 1 and the recording sector end position force of the RAM information layer corresponding to the previous address area N are within the area of the address N + 1. You may record so that it may be located.
- the ROM information layer is prerecorded with optical phase pits or wobble signals in order to record information in the RAM information layer or to reproduce information recorded in the RAM information layer. .
- the optical information recording medium 50 can have a plurality of ROM information layers and RAM information layers in the depth direction.
- FIG. 17 is an explanatory diagram for explaining the correspondence between the ROM information layer and the RAM information layer when there are a plurality of ROM information layers in the depth direction of the optical information recording medium.
- the ROM information layer address includes the layer number, and the ROM Used for servo control to select information layer.
- the protective layer constituting the optical information recording medium shown in FIG. 11 and FIG. 12 can include a function such as a polarizing plate. So far, the embodiment has been described on the assumption that the optical information recording medium of the present invention is rotated and information is recorded in the circumferential direction of the optical information recording medium, but the function of the polarizing plate is included in the rotating medium. It is extremely difficult. Therefore, as an example, a card-type optical information recording medium (card-type optical information recording medium) will be described below. Of course, if there is a polarizing plate that maintains the polarization axis in the circumferential direction and the direction perpendicular thereto, the function of the polarizing plate can be included in the rotating medium.
- a polarizing plate that maintains the polarization axis in the circumferential direction and the direction perpendicular thereto, the function of the polarizing plate can be included in the rotating medium.
- FIG. 18 is a diagram showing a configuration of a card type optical information recording medium.
- the card-type optical information recording medium 600 includes a recording layer 601, a protective layer 602, a translucent reflective layer 603, a protective layer 604, a protective layer 606, a ROM information layer 607, and a substrate 608.
- the servo control beam applied to the card type optical information recording medium 600 holds only the S-polarized light component. Also, when recording information, a light beam of P-polarized component including reference light and recording signal light is applied to the card-type optical information recording medium 600, and when reproducing information, P-polarized light component including only reference light is irradiated. The luminous flux is irradiated onto the card type optical information recording medium 600. Note that an optical information recording apparatus that records and reproduces information on the card-type optical information recording medium 600 is assumed to be the same as the optical information recording / reproducing apparatus shown in FIG.
- the basic structure of the card-type optical information recording medium is the same as that of the optical information recording medium shown in Figs. That is, the card type optical information recording medium has a ROM information layer and a RAM information layer, and an access restriction code is recorded in advance in the ROM information layer by optical phase pits.
- the ROM information layer has a rewritable area as shown in FIGS.
- the card-type optical information recording medium of FIG. 18 has a polarizing element layer 605, unlike the optical information recording medium shown in FIGS.
- This polarizing element layer 605 controls the transmission / reflection of the P-polarized light beam or the S-polarized light beam by transmission or absorption.
- the reference light and recording signal light which are P-polarized components transmitted through the protective layer 602 and the translucent reflective layer 603, are transmitted through the protective layer 604, and the absorption axis is arranged in a direction to block the P-polarized components. side It is absorbed by the optical element layer 605 and is not reflected or transmitted.
- the reference light and Z or recording signal light which are P-polarized components, do not reach the ROM information layer 607. For this reason, when the transmission type interference pattern is formed on the recording layer 601, the reference light and Z or the recording signal light do not reach the ROM information layer 607, and thus have no adverse effect upon recording / reproducing on the recording layer 601. Because the reference light and the recording signal light do not reach the ROM information layer 607, the optical phase pitch of the ROM information layer 607, the guide track of the rewritable area, the intensity modulation effect after recording, and the optical phase change This is because no diffraction phenomenon occurs.
- the polarization direction of the servo control beam which is the S-polarized component, is orthogonal to the reference light and the recording signal light of the P-polarized component, it passes through the polarizing element layer 605, and in the ROM information layer 605, Servo signals and access restriction codes can be detected. Therefore, there is no problem even if the polarizing element layer 605 is disposed in the card type optical information recording medium.
- the optical phase pit or the guide track is formed on the substrate 608 in the same process as in FIG. 11 or FIG. 12, but the direction in which the optical phase pit and the guide track are formed. Are arranged in parallel in a plurality of independent configurations linearly in the circumferential direction.
- the optical pickup unit 100, 200 When accessing the optical pickup unit 100, 200 force card type optical information recording medium 600 shown in FIG. 8, the optical pickup unit 100, 200 and the card type optical information recording medium 600 are relatively relative to each other.
- a driving device to be driven is provided.
- the optical pickup units 100, 200 are orthogonal to the direction A.
- the optical information recording / reproducing device is equipped with a drive system that can perform focusing and track control with the objective lens while moving in the plane!
- the optical pickup unit 100 has the ROM information layer.
- the access restriction code recorded in the ID card is read, and the comparison unit 32 0 allows access to the optical information recording medium 50 by comparing and comparing the read access restriction code with the key unique code recorded on the IC card 340. To prevent unauthorized rewriting or alteration of data by a third party. It can be done.
- the optical information recording / reproducing apparatus when the optical information recording / reproducing apparatus according to the present embodiment receives a request for rewriting the access restriction code recorded on the optical information recording medium 50 from the host computer 400, the access restriction code is rewritten. Compare the user identifier 1 recorded in the impossible area with the key unique code (code corresponding to user identifier 1) recorded on the IC card 340, and record it in the rewritable area of the access restriction code. It is determined whether to rewrite the user identifier 2 (and / or date / time information, etc.), and this user identifier 2 is rewritten, so that the time and cost for changing the access restriction code can be greatly reduced compared to the conventional case. Can do.
- the optical information recording medium is provided with a RAM information layer for recording user data, and a predetermined interval between the RAM information layer and access to the user data recorded by the RAM information layer. Since it has ROM information that records an access restriction code for restriction, it can be used efficiently without reducing the available storage capacity.
- the optical information recording medium records an access restriction code in the ROM information area, and among the user identifier 1 and user identifier 2 included in the access restriction code, the user identifier 1 cannot be rewritten. Since it is recorded in a possible area and the user identifier 2 is recorded in a rewritable area, a legitimate administrator can smoothly rewrite the access restriction code.
- the controller 300 notifies the host computer 400 of only the presence information for the RAM area of the RAM information layer. Therefore, the host computer 400 cannot obtain the access restriction code recorded in the ROM information layer, and an unauthorized third party operates the OS (Operating System) illegally, It becomes virtually impossible to read the access restriction code and tamper with the access restriction code.
- OS Operating System
- the optical information recording / reproducing apparatus and the optical information recording medium according to the present invention prevent falsification of identification information for identifying a user and the like by an authorized user. This is useful for optical information recording / reproducing systems that need to change identification information efficiently.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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DE112005003649T DE112005003649T5 (de) | 2005-08-03 | 2005-08-03 | Optische Informationsaufzeichnungs/Reproduktionsvorrichtung und optisches Informationsaufzeichnungsmedium |
PCT/JP2005/014229 WO2007015299A1 (ja) | 2005-08-03 | 2005-08-03 | 光情報記録再生装置および光情報記録媒体 |
JP2007529155A JPWO2007015299A1 (ja) | 2005-08-03 | 2005-08-03 | 光情報記録再生装置および光情報記録媒体 |
US12/020,114 US20080137515A1 (en) | 2005-08-03 | 2008-01-25 | Optical information recording/reproducing apparatus and optical information recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2005/014229 WO2007015299A1 (ja) | 2005-08-03 | 2005-08-03 | 光情報記録再生装置および光情報記録媒体 |
Related Child Applications (1)
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US12/020,114 Continuation US20080137515A1 (en) | 2005-08-03 | 2008-01-25 | Optical information recording/reproducing apparatus and optical information recording medium |
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WO2007015299A1 true WO2007015299A1 (ja) | 2007-02-08 |
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PCT/JP2005/014229 WO2007015299A1 (ja) | 2005-08-03 | 2005-08-03 | 光情報記録再生装置および光情報記録媒体 |
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US (1) | US20080137515A1 (ja) |
JP (1) | JPWO2007015299A1 (ja) |
DE (1) | DE112005003649T5 (ja) |
WO (1) | WO2007015299A1 (ja) |
Families Citing this family (3)
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EP1912210A4 (en) * | 2005-08-03 | 2009-01-14 | Fujitsu Ltd | DEVICE FOR RECORDING AND REPRODUCING OPTICAL INFORMATION AND OPTICAL INFORMATION RECORDING MEDIUM |
JP2008287754A (ja) * | 2007-05-15 | 2008-11-27 | Sony Corp | 光情報記録方法、光情報再生方法、光情報記録装置及び光情報再生装置 |
JP4752875B2 (ja) * | 2008-06-25 | 2011-08-17 | ソニー株式会社 | ドライブ装置、トラックジャンプ方法 |
Citations (2)
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JP2005190607A (ja) * | 2003-12-26 | 2005-07-14 | Tdk Corp | 多層ホログラフィック記録媒体のアクセス方法 |
JP2005276354A (ja) * | 2004-03-25 | 2005-10-06 | Samsung Yokohama Research Institute Co Ltd | 記録再生装置 |
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DE4220486A1 (de) * | 1992-06-23 | 1994-01-05 | Thomson Brandt Gmbh | Aufzeichnung und Wiedergabe von Informationen bei ROM-RAM-Speichermedien |
EP0585941A3 (en) * | 1992-09-03 | 1994-09-21 | Nippon Denso Co | Process for making holograms and holography device |
JPH09106625A (ja) * | 1995-10-06 | 1997-04-22 | Victor Co Of Japan Ltd | 光記録媒体及びその再生装置 |
HUP0000532A2 (hu) * | 2000-02-07 | 2002-03-28 | Optilink Ab | Eljárás és rendszer információ rögzítésére holografikus kártyán |
KR100406630B1 (ko) * | 2001-03-13 | 2003-11-20 | 엘지전자 주식회사 | 데모용 데이터의 기록 및 재생방법과, 그에 따른 기록매체 |
US20040151098A1 (en) * | 2001-04-04 | 2004-08-05 | Hideki Nagano | Data carrier, its manufacturing method, reproduction control method, and drive |
KR100923654B1 (ko) * | 2001-04-17 | 2009-10-28 | 파나소닉 주식회사 | 광 디스크 및 그것을 사용한 정보 기록/재생 장치 |
US20030002671A1 (en) * | 2001-06-11 | 2003-01-02 | Eastman Kodak Company | Delivery of electronic content over a network using a hybrid optical disk for authentication |
JP4244548B2 (ja) * | 2001-06-20 | 2009-03-25 | 日本精工株式会社 | 駆動輪用転がり軸受ユニットの設計方法 |
US6749280B2 (en) * | 2001-12-14 | 2004-06-15 | Fuji Xerox Co., Ltd. | Recording apparatus, recording method therefor and program therefor |
KR100524959B1 (ko) * | 2003-04-14 | 2005-11-01 | 삼성전자주식회사 | 광픽업 및 광 기록 및/또는 재생 기기 및 호환 트랙킹구현 방법 |
US20050018574A1 (en) * | 2003-07-25 | 2005-01-27 | Jenkins Jens C. | Hybrid optical storage media and methods of use |
JP2005135513A (ja) * | 2003-10-30 | 2005-05-26 | Fujitsu Ltd | 情報記録媒体及び情報記録再生装置 |
KR100982513B1 (ko) * | 2003-11-12 | 2010-09-16 | 삼성전자주식회사 | 사용자 키를 이용한 저장 매체 디스크 사용 제한 방법 및장치 |
JP2006127673A (ja) * | 2004-10-29 | 2006-05-18 | Toshiba Corp | 情報記録媒体、情報再生装置、情報再生方法、及び情報記録方法 |
US8151366B2 (en) * | 2004-11-12 | 2012-04-03 | Cinram International Inc. | Secure optical media storage |
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JP2008135125A (ja) * | 2006-11-29 | 2008-06-12 | Ricoh Co Ltd | 光学ヘッド、光ディスク装置及び情報処理装置 |
KR20090029026A (ko) * | 2007-09-17 | 2009-03-20 | 삼성전자주식회사 | 홀로그래픽 정보 기록/재생 장치 및 방법 |
-
2005
- 2005-08-03 JP JP2007529155A patent/JPWO2007015299A1/ja not_active Withdrawn
- 2005-08-03 WO PCT/JP2005/014229 patent/WO2007015299A1/ja active Application Filing
- 2005-08-03 DE DE112005003649T patent/DE112005003649T5/de not_active Ceased
-
2008
- 2008-01-25 US US12/020,114 patent/US20080137515A1/en not_active Abandoned
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JP2005190607A (ja) * | 2003-12-26 | 2005-07-14 | Tdk Corp | 多層ホログラフィック記録媒体のアクセス方法 |
JP2005276354A (ja) * | 2004-03-25 | 2005-10-06 | Samsung Yokohama Research Institute Co Ltd | 記録再生装置 |
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DE112005003649T5 (de) | 2008-06-12 |
JPWO2007015299A1 (ja) | 2009-02-19 |
US20080137515A1 (en) | 2008-06-12 |
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