WO2017094130A1 - Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations - Google Patents

Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations Download PDF

Info

Publication number
WO2017094130A1
WO2017094130A1 PCT/JP2015/083836 JP2015083836W WO2017094130A1 WO 2017094130 A1 WO2017094130 A1 WO 2017094130A1 JP 2015083836 W JP2015083836 W JP 2015083836W WO 2017094130 A1 WO2017094130 A1 WO 2017094130A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
information recording
optical information
marker
dimensional
Prior art date
Application number
PCT/JP2015/083836
Other languages
English (en)
Japanese (ja)
Inventor
和幸 田島
Original Assignee
株式会社日立製作所
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.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to PCT/JP2015/083836 priority Critical patent/WO2017094130A1/fr
Publication of WO2017094130A1 publication Critical patent/WO2017094130A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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
    • G11B7/0065—Recording, reproducing or erasing by using optical interference patterns, e.g. holograms

Definitions

  • the present invention relates to an apparatus and method for recording information on a recording medium or reproducing information from the recording medium using holography.
  • Patent Document 1 As a high-density recording technique for holograms, for example, there is US8275261 (Patent Document 1).
  • the ⁇ Summary '' of this publication includes ⁇ A holographic device is provided for recovering data in a holographic memory system. The device use homodyne detection to introduce a local oscillator beam into a reconstructed data beam of the recovered holof comprising the reconstructed data beam. None and local oscillator beam may be processed to obtain contrast level information for the pixels of the detected image. This contrast level information may then be used to obtain an increased signal to noise ratio (SNR) of the recovered data.
  • SNR signal to noise ratio
  • Patent Document 2 discloses “a method for processing data pixels in a holographic data storage system”. The method includes allocating a predetermined spare block throughout each data page, each spare block including a known pixel pattern, and a region of the data page and a predetermined spare block. Including determining the position error of the data page by calculating the best match between and correcting the data pixels according to the position error of the corresponding data page at the detector. " .
  • the present invention in recording digital information using holography, it is possible to always improve the quality of a reproduced signal using a known pattern even when phase multilevel information is detected in a plurality of times.
  • FIG. 4 is a diagram illustrating the arrangement of signal points that form a data pattern in the present embodiment (first embodiment).
  • FIG. 4 is a diagram illustrating a signal point arrangement constituting a marker in the present embodiment (first embodiment).
  • Schematic diagram showing an embodiment of an optical information recording / reproducing apparatus Schematic showing an embodiment of a pickup in an optical information recording / reproducing apparatus
  • Schematic showing an embodiment of a pickup in an optical information recording / reproducing apparatus Schematic showing an embodiment of a pickup in an optical information recording / reproducing apparatus
  • movement flow of the optical information recording / reproducing apparatus in a present Example The figure showing the example of composition of the signal generation circuit in this example.
  • the figure showing the example of composition of the signal processing circuit in this example The figure showing the operation
  • movement flow of the signal processing circuit in a present Example The figure showing the example of signal point arrangement
  • the figure showing real part signal separation of phase binary information The figure showing real part signal separation of phase binary information
  • the figure showing the imaginary part signal separation of the marker comprised by phase binary information The figure showing the imaginary part signal separation of the marker comprised by phase binary information
  • FIG. 2 is a block diagram showing a recording / reproducing apparatus of an optical information recording medium for recording and / or reproducing digital information using holography.
  • the optical information recording / reproducing device 10 is connected to an external control device 91 via an input / output control circuit 90.
  • the optical information recording / reproducing apparatus 10 receives the information signal to be recorded from the external control device 91 by the input / output control circuit 90.
  • the optical information recording / reproducing apparatus 10 transmits the reproduced information signal to the external control apparatus 91 by the input / output control circuit 90.
  • the optical information recording / reproducing apparatus 10 includes a pickup 11, a reproduction reference light optical system 12, a cure optical system 13, a medium rotation angle detection optical system 14, and a rotation motor 50, and a disk-shaped optical information recording medium 1. Is configured to be rotatable by a rotary motor 50.
  • the pickup 11 plays the role of irradiating the optical information recording medium 1 with reference light and signal light and recording digital information on the recording medium using holography.
  • the information signal to be recorded is sent by the controller 89 to the spatial light modulator in the pickup 11 via the signal generation circuit 86, and the signal light is modulated by the spatial light modulator.
  • the reproduction reference light optical system 12 When reproducing the information recorded on the optical information recording medium 1, the reproduction reference light optical system 12 generates a light wave that causes the reference light emitted from the pickup 11 to enter the optical information recording medium in a direction opposite to that during recording. Generate. Reproduction light reproduced by the reproduction reference light is detected by a photodetector (to be described later) in the pickup 11, and a signal is reproduced by the signal processing circuit 85.
  • the irradiation time of the reference light and the signal light applied to the optical information recording medium 1 can be adjusted by controlling the opening / closing time of the shutter in the pickup 11 via the shutter control circuit 87 by the controller 89.
  • the cure optical system 13 plays a role of generating a light beam used for pre-cure and post-cure of the optical information recording medium 1.
  • Precure is a pre-process for irradiating a predetermined light beam in advance before irradiating the desired position with reference light and signal light when recording information at a desired position in the optical information recording medium 1.
  • Post-cure is a post-process for irradiating a predetermined light beam after recording information at a desired position in the optical information recording medium 1 so that additional recording cannot be performed at the desired position.
  • the medium rotation angle detection optical system 14 is used to detect the rotation angle of the optical information recording medium 1.
  • a signal corresponding to the rotation angle is detected by the medium rotation angle detecting optical system 14, and a medium rotation motor control circuit is detected by the controller 89 using the detected signal.
  • the rotation angle of the optical information recording medium 1 can be controlled via 88.
  • a predetermined light source driving current is supplied from the light source driving circuit 82 to the light sources in the pickup 11, the cure optical system 13, and the medium rotation angle detection optical system 14, and each light source emits a light beam with a predetermined amount of light. Can do.
  • the pickup 11 and the medium cure optical system 13 are provided with a mechanism capable of sliding the position in the radial direction of the optical information recording medium 1, and position control is performed via the access control circuit 81.
  • a mechanism for detecting the deviation amount of the reference beam angle is provided in the pickup 11, a servo control signal is generated by the servo signal generation circuit 83, and the deviation amount is corrected via the servo control circuit 84. It is necessary to provide a servo mechanism for this purpose in the optical information recording / reproducing apparatus 10.
  • the pickup 11, the cure optical system 13, and the medium rotation angle detection optical system 14 may be simplified by combining several optical system configurations or all optical system configurations.
  • FIG. 3 shows a recording principle in an example of a basic optical system configuration of the pickup 11 in the optical information recording / reproducing apparatus 10.
  • the light beam emitted from the light source 301 passes through the collimator lens 302 and enters the shutter 303.
  • the shutter 303 When the shutter 303 is open, after the light beam passes through the shutter 303, the optical ratio of the p-polarized light and the s-polarized light becomes a desired ratio by the optical element 304 composed of, for example, a half-wave plate.
  • the optical element 304 composed of, for example, a half-wave plate.
  • the light is incident on a PBS (Polarization Beam Splitter) prism 305.
  • PBS Polarization Beam Splitter
  • the light beam that has passed through the PBS prism 305 functions as signal light 306, and after the light beam diameter is expanded by the beam expander 308, the light beam passes through the phase offset element 401, the relay lens 310, and the PBS prism 311 and passes through the spatial light modulator.
  • the spatial light modulator 312 can add phase information, and the phase information that can be handled may be binary or multi-value.
  • the phase information can be represented by a complex plane with the real part value on the horizontal axis and the imaginary part value on the vertical axis.
  • FIG. 10 shows signal point arrangements when handling binary phase information of “(1 + i) / ⁇ 2” and “( ⁇ 1 ⁇ i) / ⁇ 2” as an example.
  • phase information when the phase information is expressed, it is basically expressed in the form of complex amplitude, but it is equivalent even if expressed in the form of 0 to 2 ⁇ .
  • “(1 + i) / ⁇ 2” represents phase information equivalent to “ ⁇ / 4”
  • “( ⁇ 1 ⁇ i) / ⁇ 2” represents phase information equivalent to “5 ⁇ / 4”.
  • the signal light to which information is added by the spatial light modulator 312 reflects the PBS prism 311 and propagates through the relay lens 313 and the opening 314. Thereafter, the signal light is condensed on the optical information recording medium 1 by the objective lens 315.
  • the light beam reflected from the PBS prism 305 functions as reference light 307 and is set to a predetermined polarization direction according to recording or reproduction by the polarization direction conversion element 316 and then galvano- lated via the mirror 317 and the mirror 318. Incident on the mirror 319. Since the angle of the galvanometer mirror 319 can be adjusted by the actuator 320, the incident angle of the reference light incident on the optical information recording medium 1 after passing through the lens 321 and the lens 322 can be set to a desired angle. In order to set the incident angle of the reference light, an element that converts the wavefront of the reference light may be used instead of the galvanometer mirror.
  • the signal light and the reference light are incident on the optical information recording medium 1 so as to overlap each other, whereby an interference fringe pattern is formed in the recording medium, and information is written by writing this pattern as a hologram on the recording medium. Record.
  • the incident angle of the reference light incident on the optical information recording medium 1 can be changed by the galvanometer mirror 319, recording by angle multiplexing is possible.
  • holograms recorded in the same area with different reference beam angles holograms corresponding to each reference beam angle are called pages, and a set of pages angle-multiplexed in the same area is called a book. .
  • FIG. 4 shows the principle of reproduction in an example of the basic optical system configuration of the pickup 11 in the optical information recording / reproducing apparatus 10.
  • reproducing the recorded phase information it is possible to detect the amplitude information by causing the reproduction light from the medium and different light called oscillator light to interfere with each other on the photodetector 325 as described in Patent Document 1.
  • reproduction reference light is incident on the optical information recording medium 1, and a light beam transmitted through the optical information recording medium 1 is reflected by a galvanometer mirror 324 whose angle can be adjusted by an actuator 323.
  • the reproduction light reproduced by the reproduction reference light propagates through the objective lens 315, the relay lens 313, and the opening 314. Thereafter, the reproduction light passes through the PBS prism 311 and the polarizer 402 and enters the photodetector 325.
  • the signal light transmitted through the PBS prism 305 is used as the oscillator light, set to a predetermined polarization direction by the polarization direction conversion element 316, the light beam diameter is expanded by the beam expander 308, and suitable for reproduction data by the phase offset element 401. Convert to phase state. Thereafter, the light passes through the relay lens 310 and the PBS prism 311, becomes the same polarization state as the reproduction light by the polarizer 402, and enters the phase modulation spatial light modulator 312.
  • the recorded phase information can be detected as amplitude information by causing the reproduction light and the oscillator light to interfere with each other on the photodetector 325.
  • the photodetector 325 for example, an image sensor such as a CMOS image sensor or a CCD image sensor can be used. However, any element may be used as long as page data can be reproduced.
  • FIG. 11a and 11b show how signal points move when phase information is detected by the photodetector 325 as amplitude information.
  • FIG. 11a shows an example of interference between reproduction light having binary phase information of “(1 + i) / ⁇ 2” and “( ⁇ 1 ⁇ i) / ⁇ 2” and oscillator light having a phase difference of 0 with the reproduction light. The state of conversion from phase information to amplitude information is shown. When the reproduced light and the oscillator light having a phase difference of 0 are made to interfere with each other, only real part information can be detected from the complex amplitude information of the reproduced light. In the example of FIG.
  • the recorded phase information is not binary but multi-valued as shown in FIG. 12, it cannot be detected by one reproduction.
  • the real part detection and the imaginary part detection of the phase information are performed separately, and the multi-value information can be reproduced by combining the real part and the imaginary part.
  • the reproduction signal processing it is assumed that when the phase quaternary information is recorded, the real part and the imaginary part are separated and detected.
  • FIGS. 5 a, 5 b, and 5 c show an operation flow of recording and reproduction in the optical information recording / reproducing apparatus 10.
  • FIG. 5a shows an operation flow from when the optical information recording medium 1 is inserted into the optical information recording / reproducing apparatus 10 until preparation for recording or reproduction is completed.
  • FIG. 5b shows information from the ready state to the optical information recording medium 1.
  • FIG. 5 c shows an operation flow until the information recorded on the optical information recording medium 1 is reproduced from the ready state.
  • the optical information recording / reproducing apparatus 10 determines whether the inserted medium is a medium for recording or reproducing digital information using holography, for example (S501). S502). As a result of the medium discrimination, when it is determined that the optical information recording medium records or reproduces digital information using holography, the optical information recording / reproducing apparatus 10 reads control data provided on the optical information recording medium (S503). ), For example, information relating to the optical information recording medium and information relating to various setting conditions during recording and reproduction, for example.
  • the access control circuit 81 is controlled to position the pickup 11 and the cure optical system 13 at predetermined positions on the optical information recording medium.
  • the optical information recording medium 1 has address information, it reproduces the address information, checks whether it is positioned at the target position, and calculates the amount of deviation from the predetermined position if it is not positioned at the target position. And repeat the positioning operation.
  • a predetermined area is precured using the light beam emitted from the cure optical system 13 (S514), and data is recorded using the reference light and signal light emitted from the pickup 11 (S515).
  • post cure is performed using the light beam emitted from the cure optical system 13 (S516). Data may be verified as necessary.
  • the operation flow from the ready state to the reproduction of recorded information is as follows.
  • the access control circuit 81 is controlled to pick up the pickup 11 and the reproduction reference light optical system 12. Is positioned at a predetermined position on the optical information recording medium.
  • the optical information recording medium 1 has address information, it reproduces the address information, checks whether it is positioned at the target position, and calculates the amount of deviation from the predetermined position if it is not positioned at the target position. And repeat the positioning operation. Thereafter, reference light is emitted from the pickup 11, information recorded on the optical information recording medium is read (S522), and reproduction data is transmitted (S523).
  • FIG. 6 is a block diagram of the signal generation circuit 86 of the optical information recording / reproducing apparatus 10.
  • the input / output control circuit 90 notifies the controller 89 that the input of user data has started.
  • the controller 89 receives the notification from the input / output circuit 90 and instructs the signal generation circuit 86 to record the data for one page input from the input / output control circuit 90.
  • a processing command from the controller 89 is notified to the sub-controller 601 in the signal generation circuit 86 via the control line 609.
  • the sub-controller 601 controls each signal processing circuit via the control line 609 so that the signal processing circuits are operated in parallel.
  • the memory control circuit 603 is controlled to store binary user data input from the input / output control circuit 90 via the data line 610 in the memory 602.
  • the CRC calculation circuit 604 performs control to convert the user data into CRC.
  • the scramble circuit 605 scrambles the CRC-converted data by adding a pseudo-random data sequence
  • the error correction encoding circuit 606 controls error correction encoding by adding the parity data sequence.
  • the data after error correction coding is handled as corresponding to the number of multilevel signals to be recorded, and in this embodiment, a four-value signal is assumed.
  • the pickup interface circuit 607 reads the two-dimensionally modulated data in the arrangement order of the two-dimensional data on the spatial light modulator 312 and adds a marker serving as a reference for positioning the two-dimensional data during reproduction. The two-dimensional data is transferred to the spatial light modulator 312 in the inside.
  • FIG. 7 is a block diagram of the signal processing circuit 85 of the optical information recording / reproducing apparatus 10.
  • the controller 89 instructs the signal processing circuit 85 to reproduce the data for one page input from the pickup 11.
  • a processing command from the controller 89 is notified to the sub-controller 701 in the signal processing circuit 85 via the control line 712.
  • the sub-controller 701 controls each signal processing circuit via the control line 712 so that the signal processing circuits are operated in parallel.
  • the memory control circuit 703 is controlled to store the image data input from the pickup 11 via the pickup interface circuit 711 via the data line 713 in the memory 702.
  • the image position detection circuit 710 When the data stored in the memory 702 reaches a certain amount, the image position detection circuit 710 performs control to detect a marker from the image data stored in the memory 702 and extract an effective data range. Since the marker is a known pattern, for example, pattern matching described in Reference 2 can be used as a detection method. Next, the image distortion correction circuit 709 performs distortion correction such as image inclination, magnification, and distortion using the detected marker, and performs control to convert the image data into the expected two-dimensional data size.
  • the error correction circuit 706 corrects an error included in each data string, and the scramble release circuit 705 cancels the scramble to add the pseudo random number data string, and then the CRC calculation circuit 704 detects an error in the user data on the memory 702. Check not included. Since the two-dimensional data is divided into a real part and an imaginary part and detected by the detector 325, the real part / imaginary part determination of the reproduction signal is performed by the real part imaginary part signal determination circuit 707.
  • the real part signal may be determined by using, for example, information recorded in a part of the recorded information, or by making the real part imaginary part correspond to the even and odd number of times detected by the photodetector.
  • the real part imaginary part signal determination circuit 707 determines that the detected information is the real part
  • the real part signal Is stored in the real part signal storage circuit 714 and waits until the optical detector 325 detects the imaginary part signal again.
  • the real part imaginary part signal determination circuit 707 determines that the detection information is an imaginary part
  • the real part signal storage circuit 714 stores the real part signal information. Add signal and imaginary part signal.
  • the phase multilevel information can be expressed as binary user data, and then the user data is transferred from the memory 702 to the input / output control circuit 90.
  • FIG. 8 shows a data processing flow during recording.
  • Data processing during recording will be described with reference to FIG.
  • the signal generation circuit 86 receives user data (S801), it is divided into a plurality of data strings and each data string is converted to CRC (S802) so that error detection during reproduction can be performed, and the number of on pixels and the number of off pixels are substantially equal.
  • CRC CRC
  • this data string is converted into M ⁇ N two-dimensional data, and it is repeated for one page data to constitute one page of two-dimensional data (S805).
  • a marker serving as a reference for image position detection and image distortion correction during reproduction is added (S806), and the data is transferred to the spatial light modulator 312 (S807).
  • Image data detected by the photodetector 325 is transferred to the signal processing circuit 85 (S901).
  • the image position is detected based on the markers included in the image data (S902), and distortions such as image tilt, magnification, and distortion are corrected (S903), and then binarization processing (S904) is performed to remove the markers.
  • S905 two-dimensional data for one page is acquired (S906).
  • error correction processing S907 is performed to remove the parity data string.
  • the marker signal point arrangement which is a feature of the present embodiment, will be described.
  • the signal point arrangement of the marker is recorded by binary information obtained by shifting the signal point by ⁇ regardless of the multivalued number in the data area.
  • the recording signal point arrangement will be described in detail with reference to FIGS. 1a, 1b, 1c, 13a, 13b, 14a, and 14b.
  • FIG. 1a shows a part of the two-dimensional data in the first embodiment, and this two-dimensional data is composed of a data pattern generated by applying various processes to user data and a marker that is a known pattern.
  • the signal point arrangement of the data pattern is as shown in FIG. 1b
  • the signal point arrangement of the marker is as shown in FIG. 1c.
  • the signal point arrangement that constitutes the data pattern and the marker is the same, but the phase information is separated from the real part and the imaginary part by configuring only the signal point arrangement of the marker with a signal of phase difference ⁇ .
  • the marker can always be detected when detecting.
  • FIG. 13a shows only the real part of the data pattern
  • FIG. 13a shows only the real part of the data pattern
  • FIG. 13b shows the signal point arrangement when only the imaginary part is detected.
  • “(1 + i) / ⁇ 2” and “(1-i) / ⁇ 2” are detected as “1 / ⁇ 2”, respectively, and cannot be distinguished, and only the imaginary part is detected.
  • “(1 + i) / ⁇ 2” and “( ⁇ 1 + i) / ⁇ 2” are detected as “i / ⁇ 2”, respectively, and thus cannot be determined.
  • the signal point arrangement of the marker is the one shown in FIG. 1c
  • the signal point arrangement for detecting the signal point separately by the real part and the imaginary part is shown in FIGS. 14a and 14b.
  • FIG. 14a shows only the real part of the marker
  • FIG. 14b shows the signal point arrangement when only the imaginary part of the marker is detected.
  • the detected signals are “1 / ⁇ 2” and “ ⁇ 1 / ⁇ 2”, and when only the imaginary part is detected, “i / ⁇ 2” and “ ⁇ i / ⁇ 2 ”, so that it is possible to determine whether the real part or the imaginary part is detected.
  • the signal point arrangement of the marker is recorded as a binary signal having a phase difference ⁇ regardless of the signal point arrangement of the data pattern, the above-described image is obtained even when the real part and the imaginary part of the phase signal are separated and detected.
  • Position detection (S902) and distortion correction (S903) such as image tilt, magnification, distortion, and the like can be performed.
  • the signal point arrangement of the marker is “(1 + i) / ⁇ 2” and “( ⁇ 1 ⁇ i) / ⁇ 2”, but the signal point arrangement is “( ⁇ 1 + i) / ⁇ 2” and “( 1-i) / ⁇ 2 ′′, the same effect can be obtained, and any phase state can be used as long as it is a signal point arrangement with a phase difference ⁇ that does not ride on the real or imaginary axis.
  • the phase difference is ⁇ if the signal point arrangement is not symmetrical with respect to the real axis or the imaginary axis. It doesn't matter. Thereby, the distance between signals at the time of separation of the real part and the imaginary part can be arbitrarily changed. Further, if there is no signal point arrangement that cannot be discriminated when the real part and the imaginary part are separated, the binary signal may not be used. This makes it possible to detect the position of the image and correct the distortion using a marker composed of multi-value information.
  • the marker may be recorded with a phase difference ⁇ regardless of the type of signal to be handled and the information signal recording / reproducing method.
  • the present embodiment is different from the first embodiment in that the signal light is irradiated a plurality of times in the real part signal recording and the imaginary part signal recording instead of the signal light irradiation once in the phase information recording as shown in FIG.
  • the phase multilevel information is recorded as an addition of the real part and the imaginary part.
  • recording is performed so that the signal point arrangement of the marker becomes binary information of the phase difference ⁇ by one phase information recording.
  • the marker has a phase difference of ⁇ by multiple times of signal light irradiation. Recording is performed so that binary information is obtained.
  • FIG. 15 a shows the signal point arrangement when “1 / ⁇ 2” is recorded as the real part signal and “i / ⁇ 2” is recorded as the imaginary part signal.
  • the phase information recorded by addition is “(1 + i) / ⁇ 2”.
  • FIG. 15b the signal point arrangement for recording the phase information of “( ⁇ 1 ⁇ i) / ⁇ 2” by adding the real part signal of “ ⁇ 1 / ⁇ 2” and the imaginary part signal of “ ⁇ i / ⁇ 2”.
  • the information of FIG. 15a and the phase difference ⁇ can be recorded as a marker.
  • This embodiment is different from the first embodiment in that amplitude / phase multi-value information is handled as recording information.
  • information whose amplitude state is constant and whose phase state is multivalued is handled, but information whose amplitude state is multivalued as well as the phase state is handled.
  • amplitude phase information of amplitude binary phase quaternary is shown in FIG. 16a.
  • the distance between the origin and the signal point represents the amplitude information.
  • the phase difference of the marker to be generated is ⁇ , the marker can always be detected even if the real part imaginary part is separated without being limited to the amplitude value. Also, the closer the distance between signal points, the worse the quality at the time of detection.
  • the marker is “(1 + i) / ⁇ 2” and “( ⁇ 1 ⁇ i) / ⁇ 2” as shown in FIG. What is necessary is just to produce
  • this invention is not limited to an above-described Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
  • Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
  • Information such as programs, tables, and files for realizing each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
  • the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.
  • SYMBOLS 1 Optical information recording medium, 10 ... Optical information recording / reproducing apparatus, 11 ... Pickup, 12 ... Reference optical optical system for reproduction
  • Signal light 307 ... Reference light, 308 ... Beam expander, 310 ... Relay lens, 311 ... ⁇ PBS pre 312 ... Spatial light modulator, 313 ... Relay lens, 314 ... Aperture, 315 ... Objective lens, 316 ... Polarization direction conversion element, 320 ... Actuator, 321 ... Lens, 322 ... Lens, 323 ... Actuator, 324 ... Mirror, 325 ... Photodetector, 401 ... Phase offset element, 402 ... Polarizer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

Lors de la détection d'informations de phase multiniveau enregistrées dans un support d'enregistrement optique plusieurs fois séparément pour une partie réelle et une partie imaginaire, un problème se pose en ce sens qu'il est impossible, lors d'une seule reproduction, d'établir un motif de pixels connu contenu dans un bloc de réserve préétabli. Dans le but de remédier à ce problème, l'invention propose un dispositif d'enregistrement/reproduction optique d'informations qui enregistre, sous forme d'un hologramme, un signal porteur d'informations dans un support d'enregistrement optique d'informations, l'hologramme constituant une figure d'interférence entre une lumière formant signal et une lumière de référence, et qui reproduit le signal porteur d'informations à partir de l'hologramme enregistré dans le support d'enregistrement optique d'informations. Le dispositif d'enregistrement/reproduction optique d'informations comprend : une unité de projection de lumière formant signal qui projette une lumière formant signal sur le support d'enregistrement optique d'informations ; une unité de projection de lumière de référence qui projette une lumière de référence sur le support d'enregistrement optique d'informations, le signal porteur d'informations à enregistrer constituant un signal bidimensionnel contenant des informations de phase de m niveaux (m : entier naturel supérieur ou égal à 2) comportant une partie réelle et une partie imaginaire, le signal bidimensionnel contenant un marqueur servant de motif connu utilisé pour réaliser une détection de position dans des données bidimensionnelles au cours de l'enregistrement, et le marqueur constituant un signal à n niveaux (n : entier naturel supérieur ou égal à 2), la constellation de signal associée au marqueur ne présentant sensiblement pas de symétrie axiale par rapport à l'axe réel et à l'axe imaginaire sur un plan complexe.
PCT/JP2015/083836 2015-12-02 2015-12-02 Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations WO2017094130A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/083836 WO2017094130A1 (fr) 2015-12-02 2015-12-02 Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/083836 WO2017094130A1 (fr) 2015-12-02 2015-12-02 Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations

Publications (1)

Publication Number Publication Date
WO2017094130A1 true WO2017094130A1 (fr) 2017-06-08

Family

ID=58796596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/083836 WO2017094130A1 (fr) 2015-12-02 2015-12-02 Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations

Country Status (1)

Country Link
WO (1) WO2017094130A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257802A (ja) * 2006-03-24 2007-10-04 Fujifilm Corp 光記録方法、光記録装置及び光記録媒体
JP2009151841A (ja) * 2007-12-18 2009-07-09 Fuji Xerox Co Ltd 光情報再生方法、光情報再生装置、及びプログラム
WO2010067429A1 (fr) * 2008-12-10 2010-06-17 パイオニア株式会社 Procédé de reproduction holographique et dispositif holographique
WO2015011745A1 (fr) * 2013-07-22 2015-01-29 日立コンシューマエレクトロニクス株式会社 Support d'enregistrement optique d'informations, procédé d'enregistrement optique d'informations et procédé de lecture optique d'informations

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257802A (ja) * 2006-03-24 2007-10-04 Fujifilm Corp 光記録方法、光記録装置及び光記録媒体
JP2009151841A (ja) * 2007-12-18 2009-07-09 Fuji Xerox Co Ltd 光情報再生方法、光情報再生装置、及びプログラム
WO2010067429A1 (fr) * 2008-12-10 2010-06-17 パイオニア株式会社 Procédé de reproduction holographique et dispositif holographique
WO2015011745A1 (fr) * 2013-07-22 2015-01-29 日立コンシューマエレクトロニクス株式会社 Support d'enregistrement optique d'informations, procédé d'enregistrement optique d'informations et procédé de lecture optique d'informations

Similar Documents

Publication Publication Date Title
JP5802616B2 (ja) 光情報記録再生装置および光情報記録再生方法
US20090316559A1 (en) Optical information recording apparatus, optical information recording method, optical information reproducing apparatus and optical information reproducing method
JPWO2015114743A1 (ja) 光情報装置、光情報処理方法
JP5753768B2 (ja) 光情報記録装置、光情報再生装置、光情報記録再生装置、光情報記録方法、光情報再生方法および光情報記録再生方法
WO2017094130A1 (fr) Dispositif d'enregistrement/reproduction optique d'informations et procédé d'enregistrement/reproduction optique d'informations
JP6297219B2 (ja) 光情報記録装置および光情報記録方法、光情報再生装置および光情報再生方法
WO2015162653A1 (fr) Dispositif d'information optique et procédé de traitement d'information optique
WO2016194155A1 (fr) Dispositif de mémoire holographique et procédé de détection d'informations optiques
JP2015056194A (ja) 光情報再生装置、及び参照光調整方法
WO2015011745A1 (fr) Support d'enregistrement optique d'informations, procédé d'enregistrement optique d'informations et procédé de lecture optique d'informations
WO2015083247A1 (fr) Dispositif d'enregistrement d'informations optique et procédé d'enregistrement d'informations optique
WO2016009546A1 (fr) Dispositif d'enregistrement/lecture d'informations optiques, dispositif de lecture d'informations optiques, procédé de lecture d'informations optiques
WO2014083670A1 (fr) Dispositif et procédé de reproduction optique d'informations
WO2016199231A1 (fr) Dispositif de reproduction d'informations optiques et procédé de reproduction d'informations optiques
WO2020008496A1 (fr) Dispositif d'enregistrement d'hologramme, dispositif de reproduction d'hologramme, procédé d'enregistrement d'hologramme, et procédé de reproduction d'hologramme
JP6078634B2 (ja) 光情報再生装置および光情報記録再生装置
CN107077871B (zh) 光信息记录再现装置、光信息再现装置和光信息再现方法
WO2016020994A1 (fr) Dispositif d'enregistrement d'informations optiques et dispositif de reproduction d'informations optiques
WO2015083246A1 (fr) Dispositif de reproduction d'informations optiques et procédé de reproduction d'informations optiques
JP2015082327A (ja) 光情報再生装置、光情報再生方法および光情報記録方法
US20170270961A1 (en) Optical information reproducing device and optical information reproducing method
WO2016163312A1 (fr) Dispositif de reproduction d'informations optiques et procédé de reproduction d'informations optiques
JP2015146221A (ja) 光情報再生装置および光情報再生方法
JP2018206453A (ja) 光情報記録再生装置及び光情報記録再生方法
JP6040225B2 (ja) 光情報再生装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15909760

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15909760

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP