JP3892330B2 - Optical memory device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical memory device configured using a plurality of laminated waveguide hologram optical memory chips, which are hologram recording media using light.
[0002]
[Prior art]
As shown by reference numeral 10 in FIG. 8, the laminated waveguide hologram optical memory chip is configured by stacking a plurality of recording films 12 (11a, 12a; 11b, 12b; 11c, 12c;...) Each protected by a protective layer 11. In addition, information can be recorded for each recording film 12. The hologram recording medium that is the optical memory chip 10 is the basis of the laminated waveguide hologram optical card recording. About 100 layers of the protective layer 11 and the recording film 12 are stacked to form a laminated waveguide hologram optical memory chip. Used as a large-capacity recording medium.
[0003]
The basic configuration of the optical recording system for writing and reading information to and from the optical memory chip 10 shown in FIG. 8 is a laser 21 that irradiates the optical memory chip 10 with reference light 22 from the side as shown in FIG. And a means (not shown) for irradiating the object light 24 from below and a CCD 23 provided above the optical memory chip 10 for reading information.
[0004]
In order to write information into the optical memory chip 10 using the optical system configured as described above, the reference light 22 generated from the laser 21 is supplied from the side of the optical memory chip 10 to one of the recording units including the protective layer 11 and the recording film 12. The optical memory chip 10 is irradiated with a flat beam of layers, and the object light 24 is irradiated onto the optical memory chip 10 from below the optical memory chip 10, thereby recording information corresponding to the object light 24 of the optical memory chip 10.
[0005]
Further, in order to read the recorded information from the optical memory chip 10 as described above, the optical memory chip 10 is irradiated with the reference light 22 of one layer of flat laser light from the laser 21 from the side, and the optical memory chip 10 Information is read by the CCD 23 provided above.
[0006]
[Problems to be solved by the invention]
The optical memory chip 10 which is the hologram recording medium described above has a high recording density, but has a problem that since it is small, it has a small recording capacity and it is difficult to record a large amount of data.
[0007]
Conventionally, it is necessary to mount and remove the optical memory chip 10 from / to the read / write device for each chip, and there is a problem that it takes time to replace the chip.
[0008]
The present invention has been made in view of the above, and an object of the present invention is to provide an optical memory device capable of reading and writing with a large capacity and high speed by providing a plurality of hologram recording media on a tape, a disk, and a cylindrical body. It is to provide.
[0009]
[Means for Solving the Problems]
  To achieve the above object, the present invention according to claim 1 is a tape provided with a plurality of hologram recording media capable of recording information;A spacer provided in each gap between adjacent hologram recording media;Selection means for controlling the winding and feeding of the tape to select a desired hologram recording medium from among a plurality of hologram recording media provided on the tape, and information on the selected hologram recording medium And a reading / writing means for writing or reading.
[0010]
  According to the first aspect of the present invention, a plurality of hologram recording media are provided on the tape, and the desired hologram recording medium of the plurality of hologram recording media on the tape is controlled by controlling winding and feeding of the tape. High-speed, large-capacity optical memory device that can continuously read and write large-capacity information with a hologram recording medium provided on a tape, in order to write or read information on the selected hologram recording medium Can be realized.In addition, since a spacer is provided in each gap between adjacent hologram recording media, the unevenness caused by pasting a plurality of hologram recording media on the tape can be eliminated, and the surface can be smoothed. This makes it possible to smoothly run the tape.
[0011]
  Further, the present invention according to claim 2 is a disc in which a plurality of hologram recording media capable of recording information are provided in a circumferential direction;A spacer provided in each gap between adjacent hologram recording media;Selection means for controlling the rotation of the disk to select a desired hologram recording medium from among a plurality of hologram recording media provided on the disk, and writing or reading of information with respect to the selected hologram recording medium The gist of the present invention is to have a reading / writing means for performing the above.
[0012]
  In the present invention described in claim 2, a plurality of hologram recording media are provided on the disk, the rotation of the disk is controlled, and a desired hologram recording medium is selected from the plurality of hologram recording media on the disk. Realizes a high-speed ultra-high-capacity optical memory device that can continuously read and write a large amount of information using the hologram recording medium provided on the disk to write or read information to or from the selected hologram recording medium can do.In addition, since a spacer is provided in each gap between adjacent hologram recording media, the unevenness caused by attaching a plurality of hologram recording media on the disk can be eliminated, and the surface can be smoothed. This makes it possible to smoothly run the disc.
[0013]
  Furthermore, the present invention described in claim 3 is a cylindrical body provided with a hologram recording medium capable of recording information on a plurality of peripheral surfaces;A spacer provided in each gap between adjacent hologram recording media;Selection means for controlling the rotation of the cylindrical body to select a desired hologram recording medium from among the plurality of hologram recording media provided on the peripheral surface of the cylindrical body, and the selected hologram recording medium The gist of the invention is to have a read / write means for writing or reading information.
[0014]
  In the present invention described in claim 3, a plurality of hologram recording media are provided on the circumferential surface of the cylindrical body, the rotation of the cylindrical body is controlled, and a plurality of hologram recording media on the circumferential surface of the cylindrical body are controlled. In order to select a desired hologram recording medium and write or read information on the selected hologram recording medium, a large volume of information is continuously read and written by the hologram recording medium provided on the peripheral surface of the cylindrical body. It is possible to realize a high-speed and ultra-high capacity optical memory device that can be used.In addition, since the spacer is provided in each gap between the adjacent hologram recording media, it is possible to eliminate the unevenness caused by pasting a plurality of hologram recording media on the cylindrical body, and to smooth the surface, As a result, the cylindrical body can run smoothly.
[0015]
The gist of the present invention described in claim 4 is that, in the invention described in claim 1, the plurality of hologram recording media are provided on the front surface or the back surface of the tape or both the front surface and the back surface.
[0016]
The gist of the present invention described in claim 5 is that, in the invention described in claim 2, the plurality of hologram recording media are provided on the front surface or the back surface of the disk or both the front surface and the back surface.
[0017]
  Further, the present invention according to claim 6 is the invention according to claim 3, wherein the plurality of hologram recording media are provided on an outer peripheral surface or an inner peripheral surface of the cylindrical body, or both of the outer peripheral surface and the inner peripheral surface. Is the gist.
  According to a seventh aspect of the present invention, in the first to sixth aspects of the invention, the read / write means writes the first information written in the adjacent first hologram recording medium and second hologram recording medium, respectively. And a second read / write device capable of reading the second information and the second information, respectively, a storage unit connected to the second read / write device, the storage unit and the first read / write device An information reproducing unit connected to the reading / writing device and capable of reading and reproducing information, the first reading / writing device reading means for reading the first information from the first hologram recording medium; And a transmission means for transmitting the read first information to the information reproducing unit, wherein the second read / write device reads the second information from the second hologram recording medium. A reading unit; and a storage unit that stores the read second information in the storage unit. The information reproducing unit receives the first information from the first read / write device, and then stores the second information. The gist of the present invention is to have a reading means for reading out the second information from the storage unit.
  In this invention of Claim 7, after an information reproducing part receives the 1st information written in the 1st hologram recording medium from the 1st read / write device, it adjoins the 1st hologram recording medium. Since the second information written in the second hologram recording medium is read from the storage unit, the information can be read continuously without interruption even when the tape or the like moves.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of an optical memory device according to an embodiment of the present invention. The optical memory device shown in the figure has a tape delivery rotor 50, a tape take-up rotor 51, one end attached to the tape feed rotor 50 and wound, and the other end attached to the tape take-up rotor 51 and wound. The guide tape 52 with an optical memory chip, which is stretched between the rotors and provided with a large number of optical memory chips as the hologram recording medium described in FIG. 8 on the surface, and the guide tape 52 with the optical memory chip. In addition, it comprises a read / write device 53 for writing and reading information to and from a large number of optical memory chips.
[0019]
As shown in FIG. 2, the guide tape 52 with an optical memory chip is configured by attaching a large number of optical memory chips 31 with a gap 32 on a guide tape 30 that is a tape body. This optical memory chip 31 has a hologram recording formed by stacking a plurality of recording films 12 (11a, 12a; 11b, 12b; 11c, 12c;...) Protected by the protective layer 11 as described in FIGS. A medium, that is, a laminated waveguide hologram optical memory chip.
[0020]
In the present embodiment, the guide tape 52 with an optical memory chip is configured such that a large number of optical memory chips 31 are attached only to one surface of the guide tape 30 as shown in FIG. Although not shown in each gap 32 between the adjacent optical memory chips 31, for example, by providing a spacer or the like, the unevenness due to the optical memory chip 31 being stuck on the guide tape 30 is eliminated, and the surface is smoothed. This makes it possible to smoothly run the tape.
[0021]
Further, the guide tape 52 with an optical memory chip may be configured by attaching a large number of optical memory chips 43 and 44 to both the front and back surfaces of the guide tape 42 as shown in the side view of FIG. Good. That is, the optical memory chip may be provided on the front surface or the back surface of the guide tape 52 or on both the front surface and the back surface.
[0022]
In the optical memory device shown in FIG. 1 configured as described above, in order to read / write information from / to the optical memory chip attached to the guide tape 52, the tape delivery rotor 50 and the tape take-up rotor 51 are not shown. The guide tape 52 is driven to rotate by the apparatus, and the optical memory chip to be read / written is brought to the place of the read / write apparatus 53. Then, the recording layer of the optical memory chip to be read / written is moved to the reading / writing device 53, and information is read / written from / to the recording layer. Note that the rotation by the tape delivery rotor 50 and the tape take-up rotor 51 is not only forward rotation but also reverse rotation, so that information can be read from and written to the optical memory chip in the same manner.
[0023]
As described above, in the present embodiment, an optical memory that continuously moves by attaching a large number of optical memory chips on the guide tape 52 and causing the guide tape 52 to run by the tape feeding rotor 50 and the tape take-up rotor 51. Information can be continuously read from and written to the chip. A large amount of information can be stored in a compact manner by winding the guide tape 52 with a large number of optical memory chips attached to the tape delivery rotor 50 or the tape take-up rotor 51.
[0024]
Next, with reference to FIGS. 4 and 5, the principle of the continuous reading operation in the case where there are gaps 32 between the multiple optical memory chips attached to the guide tape 52 as described above will be described.
[0025]
FIG. 4 is a diagram showing a configuration of a device that performs this continuous reading operation. This device includes a first read / write device 601, a second read / write device 602, a buffer storage unit 604, and an information reproduction unit 605. It consists of and. Reference numeral 603 denotes the moving direction of the guide tape 52.
[0026]
The continuous reading operation configured as described above will be described with reference to the time chart shown in FIG. 5A is a time chart showing the data reading operation of the first read / write device 601, FIG. 5B is a time chart showing the data reading operation of the second read / write device 602, and FIG. ) Is a time chart showing data of the information reproducing unit 605.
[0027]
First, the guide tape 52 is moved in the tape moving direction indicated by 603, and the data (1) 606 of the optical memory chip provided on the guide tape 52 is read by the first read / write device 601 as shown in FIG. At this time, the second read / write device 602 reads data (2) 610 of the next optical memory chip on the guide tape 52. Here, as shown in FIG. 5B, the data (2) 610 is read as buffer storage data (1) 612 in the buffer storage unit 604. Note that if the data amount in the buffer storage unit 604 is read for the time corresponding to the tape movement amount in the gap (1) 608 shown in FIG. 5A, an extra memory is not provided in the buffer storage unit 604. It is economical.
[0028]
Further, the read data of the information reproducing unit 605 is data (1) 614 as shown in FIG. At this time, the data (2) 610 is read into the buffer storage unit 604. Next, the data (2) 610 is read by the first read / write device 601. If the guide tape 52 is moved before that, a gap (1) 608 is formed between the data (2) 615 and the information is continued. The transfer will be interrupted. For that time, the buffer storage data (1) 612 stored in advance in the buffer storage unit 604 is read, this data is sent to the information reproduction unit 605, and the information is continuously read so that the information is not interrupted.
[0029]
In the same manner as described above, next, the data (2) 607 is read by the first read / write device 601. Next, when the gap (2) 609 comes, the data (2) 615 is read and then the data (3) 611 is read. It is stored in the buffer storage unit 604 as buffer storage data (2) 613, and when the gap (2) 609 comes, the buffer storage data (2) 613 of the buffer storage unit 604 is sent as information to the information reproduction unit 605. By repeating the operation in the same manner, information transfer can be performed without interruption.
[0030]
In the above-described embodiment, the case where a large number of optical memory chips are attached to the guide tape 52 with an optical memory chip has been described. A large amount of recording layers can be easily produced by configuring in this manner. The guide tape 52 is preferably transparent so that the object light can be irradiated from the back of the optical memory chip 10. Furthermore, the optical memory device of this embodiment can be used not only as a recording medium for reading and writing information, but also as a write once medium that can be written once, and as a read-only memory (ROM). Can also be used.
[0031]
Next, an optical memory device according to another embodiment of the present invention will be described with reference to FIG. In the optical memory device of the embodiment shown in the figure, a large number of optical memory chips 71 are pasted with a gap in the circumferential direction on the disk substrate 70, and between the optical memory chips 71 on the circumference of the disk substrate 70. A read / write device 72 for reading / writing information from / to the optical memory chip 71 is provided at the position. In the figure, a motor for rotating the disk substrate 70 is omitted.
[0032]
Further, although not shown in the gaps between the optical memory chips 71 adjacent in the circumferential direction on the disk substrate 70, for example, by providing a spacer or the like, unevenness caused by attaching the optical memory chip 71 on the disk substrate 70 is provided. Can be eliminated and the surface can be smoothed. As a result, the disk substrate 70 can run smoothly.
[0033]
In the optical memory device of this embodiment configured as described above, in order to read / write information from / to the optical memory chip 71 attached in the circumferential direction on the disk substrate 70, a disk (not shown) is driven to rotate. The substrate 70 is rotated, and the optical memory chip 71 to be read / written is brought to the place of the read / write device 72. Then, the recording layer of the optical memory chip 71 to be read / written is moved to the reading / writing device 72, and information is read / written from / to the recording layer. The disk substrate 70 can be read and written in the same manner with respect to the optical memory chip not only in the forward direction but also in the reverse direction.
[0034]
In the optical memory device in which a large number of optical memory chips 71 are arranged in the circumferential direction on the disk substrate 70 thus configured, access to the desired optical memory chip 71 to be read / written and access to necessary information are performed on the disk substrate 70. It can be performed at high speed by rotating.
[0035]
Although not shown, as shown in FIGS. 4 and 5 described above, by providing two adjacent read / write devices 72, while the first read / write device reads / writes information, The optical memory chip 71 to be accessed is read / written by the second read / write device, the information is stored in a separate buffer storage unit, and the read / write processing of the corresponding optical memory chip 71 in the first read / write device is completed. During the movement of the optical memory chip 71 to be read / written next, the information stored in the buffer storage unit is used, thereby eliminating the information transfer gap during the movement of the optical memory chip 71 without interruption. It is possible to read and write continuously.
[0036]
Although not shown in the drawings, the disk substrate 70 can be configured to be stacked on the same rotation axis in a layered manner so that a recording apparatus with a larger capacity can be configured. Further, the disk substrate 70 does not need to be circular, and may be polygonal. Further, the disk substrate 70 is preferably transparent so that the object light can be irradiated from the back of the optical memory chip 71. Furthermore, the optical memory device of the present embodiment can be used not only as a recording medium for reading and writing information but also as a write once medium that can be written once, and further, a read only memory (ROM). Can also be used. In the present embodiment, the case where the optical memory chip 71 is provided on one surface, for example, the front surface of the disk substrate 70 has been described. The optical memory chip 71 may be provided on both sides, and the optical memory chip 71 may be applied not only to the disk substrate 70 but also to a hologram recording medium that is an optical memory chip as a recording layer. .
[0037]
Next, an optical memory device according to another embodiment of the present invention will be described with reference to FIG. In the optical memory device of the present embodiment, a large number of optical memory chips 81 are attached on the peripheral surface of the drum substrate 80 which is a cylindrical body, and the optical memory chips are disposed at appropriate positions between the optical memory chips 81 on the peripheral surface of the drum substrate 80. A read / write device 82 for reading / writing information from / to 81 is provided. In the figure, a motor for rotating the drum substrate 81 is omitted.
[0038]
Although not shown in the respective gaps between the adjacent optical memory chips 81 on the peripheral surface of the drum substrate 80, for example, by providing a spacer or the like, unevenness caused by attaching the optical memory chip 81 on the drum substrate 80 is provided. Without it, the surface can be smoothed. Thereby, the drum substrate 80 can be smoothly run.
[0039]
In the optical memory device of this embodiment configured as described above, in order to read / write information from / to the optical memory chip 81 attached to the peripheral surface of the drum substrate 80, a drum substrate is driven by rotating a motor (not shown). The optical memory chip 81 to be read / written is brought to the place of the read / write device 82 by rotating 80. Then, the recording layer of the optical memory chip 81 to be read / written is moved to the reading / writing device 83, and information is read / written from / to the recording layer. Note that the drum substrate 80 can be read and written in the same manner with respect to the optical memory chip not only in the forward rotation but also in the reverse rotation.
[0040]
In the optical memory device in which a large number of optical memory chips 81 are arranged on the peripheral surface of the drum substrate 80 configured as described above, access to the desired optical memory chip 81 to be read / written and access to necessary information are provided on the drum substrate 80. It can be performed at high speed by rotation.
[0041]
Although not shown, as shown in FIGS. 4 and 5 described above, by providing two adjacent read / write devices 82, while the first read / write device reads / writes information, The optical memory chip 81 to be accessed is read / written by the second read / write device, the information is stored in a separate buffer storage unit, and the read / write processing of the corresponding optical memory chip 81 in the first read / write device is completed. During the next movement of the optical memory chip 81 to be read and written, the information stored in the buffer storage unit is used, thereby eliminating the information transfer gap during the movement of the optical memory chip 81 without interruption. It is possible to read and write continuously.
[0042]
Although not shown, the drum substrate 80 can be configured as a recording apparatus with a larger capacity by stacking the drum substrates 80 on the same rotation axis. The cylindrical body constituting the drum substrate 80 is preferably transparent so that the object light can be irradiated from the back of the optical memory chip 81. Furthermore, the optical memory device of this embodiment can be used not only as a recording medium for reading and writing information, but also as a write once medium that can be written once, and as a read-only memory (ROM). Can also be used. In the present embodiment, the case where the optical memory chip 81 is provided on the outer peripheral surface of the drum substrate 80 is described. However, the present invention is not limited to this, and the inner peripheral surface or the outer peripheral surface and the inner peripheral surface are not limited thereto. Further, the optical memory chip 81 may be applied not only to the drum substrate 80 but also to a hologram recording medium that is an optical memory chip as a recording layer applied on the disk substrate 70. is there.
[0043]
【The invention's effect】
  As described above, according to the present invention, a plurality of hologram recording media are provided on a tape, and the desired hologram recording of the plurality of hologram recording media on the tape is controlled by controlling winding and feeding of the tape. Since a medium is selected and information is written to or read from the selected hologram recording medium, a high-speed ultra-high capacity optical memory capable of continuously reading and writing a large amount of information with the hologram recording medium provided on the tape An apparatus can be realized.In addition, since a spacer is provided in each gap between adjacent hologram recording media, the unevenness caused by pasting a plurality of hologram recording media on the tape can be eliminated, and the surface can be smoothed. This makes it possible to smoothly run the tape.
[0044]
  Further, according to the present invention, a plurality of hologram recording media are provided on the disc, the rotation of the disc is controlled, and a desired hologram recording medium is selected from the plurality of hologram recording media on the disc, and this selection is made. Since information is written to or read from the hologram recording medium, it is possible to realize a high-speed and ultra-high capacity optical memory device that can continuously read and write a large amount of information with the hologram recording medium provided on the disk. .In addition, since a spacer is provided in each gap between adjacent hologram recording media, the unevenness caused by attaching a plurality of hologram recording media on the disk can be eliminated, and the surface can be smoothed. This makes it possible to smoothly run the disc.
[0045]
  Further, according to the present invention, a plurality of hologram recording media are provided on the circumferential surface of the cylindrical body, and the rotation of the cylindrical body is controlled, so that a desired hologram recording of the plurality of hologram recording media on the circumferential surface of the cylindrical body is performed. Since a medium is selected and information is written to or read from the selected hologram recording medium, a large amount of information can be read and written continuously by the hologram recording medium provided on the peripheral surface of the cylindrical body. A high-speed, ultra-large capacity optical memory device can be realized.In addition, since the spacer is provided in each gap between the adjacent hologram recording media, it is possible to eliminate the unevenness caused by pasting a plurality of hologram recording media on the cylindrical body, and to smooth the surface, As a result, the cylindrical body can run smoothly.
  According to the invention, the information reproducing unit receives the first information written in the first hologram recording medium from the first read / write device, and then receives the second information adjacent to the first hologram recording medium. Since the second information written in the hologram recording medium is read from the storage unit, the information can be read continuously without interruption even when the tape or the like moves.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an optical memory device according to an embodiment of the present invention.
2 is a diagram showing a configuration of a guide tape with an optical memory chip used in the optical memory device shown in FIG. 1; FIG.
3 is a side view of the guide tape with an optical memory chip shown in FIG. 2; FIG.
4 is a diagram illustrating a configuration of a device that performs a continuous reading operation on the optical memory device illustrated in FIG. 1;
5 is a time chart showing a continuous reading operation of the continuous reading apparatus shown in FIG.
FIG. 6 is a diagram illustrating a configuration of an optical memory device according to another embodiment of the present invention.
FIG. 7 is a diagram showing a configuration of an optical memory device according to another embodiment of the present invention.
FIG. 8 is a perspective view showing a configuration of an optical memory chip that is a hologram recording medium.
9 is a perspective view showing a basic configuration of an optical recording system for writing and reading information to and from the optical memory chip shown in FIG.
[Explanation of symbols]
10, 31, 43, 44, 71, 81 Optical memory chip
11 Protective layer
12 Recording film
30, 42 Guide tape
50 Tape feed rotor
51 Tape winding rotor
52 Guide tape with optical memory chip
53, 72, 82 Read / write device
70 disc substrate
80 Drum board (cylindrical body)

Claims (7)

A tape provided with a plurality of hologram recording media capable of recording information;
A spacer provided in each gap between adjacent hologram recording media;
Selection means for controlling winding and feeding of the tape to select a desired hologram recording medium from among a plurality of hologram recording media provided on the tape;
An optical memory device comprising: a read / write unit that writes or reads information to or from the selected hologram recording medium. A disc in which a plurality of hologram recording media capable of recording information are provided in the circumferential direction;
A spacer provided in each gap between adjacent hologram recording media;
Selection means for controlling the rotation of the disk and selecting a desired hologram recording medium from among a plurality of hologram recording media provided on the disk;
An optical memory device comprising: reading / writing means for writing or reading information to or from the selected hologram recording medium. A cylindrical body provided with a plurality of hologram recording media capable of recording information on a plurality of circumferential surfaces;
A spacer provided in each gap between adjacent hologram recording media;
Selection means for controlling the rotation of the cylindrical body to select a desired hologram recording medium among a plurality of hologram recording media provided on the peripheral surface of the cylindrical body;
An optical memory device comprising: reading / writing means for writing or reading information to or from the selected hologram recording medium.   2. The optical memory device according to claim 1, wherein the plurality of hologram recording media are provided on the front surface or the back surface of the tape or on both the front surface and the back surface.   3. The optical memory device according to claim 2, wherein the plurality of hologram recording media are provided on the front surface or the back surface of the disk or on both the front surface and the back surface.   4. The optical memory device according to claim 3, wherein the plurality of hologram recording media are provided on an outer peripheral surface or an inner peripheral surface of the cylindrical body or on both surfaces of the outer peripheral surface and the inner peripheral surface. The read / write means is a first read / write device capable of reading the first information and the second information respectively written in the adjacent first hologram recording medium and second hologram recording medium, and second A read / write device, a storage unit connected to the second read / write device, and an information reproduction unit connected to the storage unit and the first read / write device and capable of reading and reproducing information Further comprising
The first read / write device includes:
Reading means for reading the first information from the first hologram recording medium;
Transmitting means for transmitting the read first information to the information reproducing unit;
The second read / write device includes:
Reading means for reading the second information from the second hologram recording medium;
Storage means for storing the read second information in the storage unit,
The information reproducing unit
7. The apparatus according to claim 1, further comprising a reading unit that reads the second information from the storage unit after receiving the first information from the first read / write device. 8. Optical memory device.

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