WO2005006317A1 - ホログラフィック記録媒体、ホログラフィック記録媒体へのアドレス情報付加方法及びアドレス方法 - Google Patents
ホログラフィック記録媒体、ホログラフィック記録媒体へのアドレス情報付加方法及びアドレス方法 Download PDFInfo
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- WO2005006317A1 WO2005006317A1 PCT/JP2004/007693 JP2004007693W WO2005006317A1 WO 2005006317 A1 WO2005006317 A1 WO 2005006317A1 JP 2004007693 W JP2004007693 W JP 2004007693W WO 2005006317 A1 WO2005006317 A1 WO 2005006317A1
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- dimensional information
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- holographic recording
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Classifications
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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
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S359/00—Optical: systems and elements
- Y10S359/90—Methods
Definitions
- Holographic recording medium method for adding address information to holographic recording medium, and addressing method
- the present invention relates to a holographic recording medium used for recording and reproducing information using holography, a method of adding address information to a holographic recording medium, and an address method.
- holographic recording in which information is recorded on a recording medium using holography, for example, a laser beam from a laser diode is split into an object beam and a reference beam by a beam splitter, and the information beam is obtained by modulating the object beam.
- the information is recorded on the holographic recording medium by an interference pattern between the holographic recording medium and the reference light.
- the holographic recording medium is irradiated with reference light to reproduce information by diffraction due to an interference pattern.
- holographic recording medium in which two-dimensional information pages each including a large number of pixels capable of holographic recording are multiplexed and provided.
- address information as hologram information is recorded at a specific location in a two-dimensional information page.
- address information is recorded on the reflection surface of the reflection substrate outside the hologram layer.
- the present invention has been made in view of the above-mentioned conventional problems, and arranges address information in a two-dimensional information page so that it can be detected by a simple address operation. It is an object of the present invention to provide a holographic recording medium, a method for adding address information to a holographic recording medium, and an addressing method capable of identifying a holographic recording medium.
- the present inventor has conducted intensive research to provide an address information area at a different position in a page for each two-dimensional information page or for each page group including a plurality of two-dimensional information pages, and to set a two-dimensional information from that position. We saw that information pages could be identified by simple address manipulation.
- a holographic recording medium in which a two-dimensional information page force S consisting of a large number of pixels is multiplexed and holographically recorded, and a signal of an address pixel and a data pixel for each of the two-dimensional information pages Is recorded, and a plurality of pixels in the two-dimensional information page constitute an address information area by a set as the address pixels, and the address information area is provided for each two-dimensional information page or from a plurality of two-dimensional information pages.
- the position in the two-dimensional information page is differently arranged, and the pixel force outside the address information area in the two-dimensional information page is data in which two-dimensional information is recorded as the data pixel.
- a holographic recording medium comprising an area.
- the set of address pixels is different from the set of pixels similar to the set of address pixels in the data area in at least one of an on-pixel ratio and an on-pixel arrangement.
- the holographic recording medium of (1) is different from the set of pixels similar to the set of address pixels in the data area in at least one of an on-pixel ratio and an on-pixel arrangement.
- the holo recording medium according to (3) wherein the on-pixel ratio in the data area is set to 50%, and the on-pixel ratio in the address information area is less than 50% or more than 50%.
- the address information area is composed of a pixel block including a set of at least nine address pixels, and all the address pixels of this pixel block are turned on or off. ) Or the holographic recording medium of (4).
- the address information area is provided at the same position in the same page group, and the address information area in the same page group has an on or off pixel arrangement of the secondary
- the holographic recording medium according to any one of (1) to (4), wherein the holographic recording medium is different for each original information page.
- a plurality of pixels are set as address pixels at different positions in each two-dimensional information page or in each page group including a plurality of two-dimensional information pages.
- a holographic recording medium, wherein two-dimensional information is added to a data area composed of pixels other than the address information area in the two-dimensional information page and holographic recording is performed. Address information addition method.
- the set of address pixels is different from the set of pixels in the data area similar to the set of address pixels so that at least one of an on-pixel ratio and an on-pixel arrangement is different.
- the data area has an on-pixel ratio of 50%, and the address information area has an on-pixel ratio of less than 50% or more than 50%.
- a method for adding address information to a holographic recording medium is a method for adding address information to a holographic recording medium.
- the address information area is provided at the same position in the same page group, and the address information area in the same page group has a different on-pixel arrangement for each two-dimensional information page.
- the holographic recording medium according to any one of (7) to (10), I information addition method.
- the address pixels and data pixels constituting the two-dimensional information page are displayed by pixels in the spatial light modulator arranged on the optical path of the information light.
- a two-dimensional information page composed of a large number of pixels is multiplexed and holographically recorded by interference between the reference light and the information light, and a plurality of pixels among the pixels are included in the two-dimensional information page.
- An address information area consisting of a set of pixels as an address pixel and a data area consisting of the remaining pixels and capable of recording two-dimensional information are provided, and the address information area is provided for each two-dimensional information page.
- the data area is recorded with an on-pixel ratio of 50%
- the address information area is recorded with an on-pixel ratio of less than 50% or more than 50%.
- the reference light or search light is sequentially irradiated for each two-dimensional information page while being limited to the range of the address information area in the target two-dimensional information page, and the irradiation area of the reference light or search light is irradiated.
- (13) or (14) the addressing method for a holographic recording medium, wherein a target two-dimensional information page is detected by a diffracted light generated when the information coincides with the address information area.
- the address information area is recorded in a different on-pixel array for each two-dimensional information page or for each two-dimensional information page in the same page group.
- the two-dimensional information page power S consisting of a large number of pixels is multiplexed and holographically recorded, and for each of the two-dimensional information pages, signals of address pixels and data pixels are recorded.
- a plurality of pixels in the two-dimensional information page constitute an address information area as a set of address pixels, and the address information area is provided for each two-dimensional information page or for each page group including a plurality of two-dimensional information pages.
- the holograms are arranged at different positions in the two-dimensional information page, and pixels outside the address information area in the two-dimensional information page constitute data areas in which two-dimensional information is recorded as data pixels.
- An apparatus for reproducing the two-dimensional information on a graphic recording medium wherein a laser beam is split into an object beam and a reference beam by a beam splitter.
- a spatial light modulator comprising: a plurality of pixels capable of displaying the two-dimensional information page, wherein the spatial light modulator includes a plurality of pixels capable of displaying the two-dimensional information page.
- FIG. 1 is an optical layout diagram including a partial block diagram showing a hook recording / reproducing apparatus using a holographic recording medium according to an example of an embodiment of the present invention.
- FIG. 2A is a map showing an address information area and a data area of a two-dimensional information page recorded / reproduced on the holographic recording medium.
- FIG. 2B is a map showing another two-dimensional information page.
- FIG. 2C is a map showing still another two-dimensional information page.
- FIG. 2D is a map showing still another two-dimensional information page.
- FIG. 3 is a schematic diagram showing an arrangement of optical elements and a recording Z reproduction pattern in the holographic recording Z reproduction apparatus.
- FIG. 4 is a schematic diagram showing a relationship between a detection area and a virtual sensor area when searching for a two-dimensional information page in the holographic recording Z playback apparatus.
- FIG. 5 is a diagram showing a sum of detected light amounts in a virtual sensor area.
- FIG. 6 is a diagram showing a difference between the detected light amounts.
- FIG. 7 is a schematic diagram showing another addressing method in the holographic recording / reproducing apparatus.
- FIG. 8 is a diagram showing the relationship between the position of an address information area in a two-dimensional information page and the amount of light detected in a virtual sensor area.
- FIG. 9 is an optical system diagram including a partial block diagram showing a holographic recording / reproducing device according to a second example of an embodiment of the present invention.
- FIG. 10 is a map showing a first two-dimensional information page group recorded / reproduced on a holographic recording medium in the holographic recording / reproducing apparatus.
- FIG. 11 is a map showing the second two-dimensional information page group.
- FIG. 12 is a map showing a third two-dimensional information page group.
- FIG. 13 is a map showing a fourth two-dimensional information page group.
- FIG. 14 is a map showing a light modulation state in an SLM when a two-dimensional information page group is searched in the holographic recording Z playback apparatus.
- FIG. 15 is a schematic diagram for explaining calculation of the total number of addresses when the search method is used.
- FIG. 17 is a diagram showing combinations of on-pixel arrangements of an address information area in the holographic recording medium.
- a holographic recording / reproducing apparatus 10 including a holographic recording medium 12 includes a laser light source 14 such as a laser diode, A beam expander 16 for enlarging the beam diameter of the laser beam from 14, a beam splitter 18 for splitting the laser beam collimated by the beam expander 16 into an object beam and a reference beam.
- An object optical system 20 for guiding the object light split by the beam splitter 18 to the holographic recording medium 12 and a reference optical system 22 for guiding the reference light are provided.
- a spatial light modulator (SLM) 24, a mirror 26, and a Fourier lens 28 are arranged in this order from the beam splitter 18 side. Further, a mirror 30 is arranged in the middle of the reference optical system 22.
- the SLM 24 adds two-dimensional information to the object light transmitted through the beam splitter 18 to generate information light, and is composed of, for example, a transmission type liquid crystal cell.
- reference numeral 32 denotes a position controller for controlling the position of the holographic recording medium 12 with respect to the reference light and the information light
- 34 denotes a hologram formed by the reference light and / or the information light
- a CCD for reproducing two-dimensional page information from the CCD, 36 is a Fourier lens disposed between the holographic recording medium 12 and the CCD 34
- 38 controls the laser light source 14, the position controller 32, and outputs the CCD 34 3 shows a control device to which a signal is input.
- holographic recording medium 12 two-dimensional information pages are multiplexed to enable holographic recording.
- the two Fourier lenses 28 and 36 have a confocal CFP, and the SLM 24, the Fourier lens 28, the confocal CFP, the Fourier lens 36 and the CCD 34 Is a so-called 4f optical system, which is arranged at an interval of the focal length f of the Fourier lenses 28 and 36.
- the pattern (two-dimensional information) formed on the SLM24 is transferred by the object light and completely After the image is Fourier-transformed and further passes through the second Fourier lens 36, an image is formed on the CCD 34, and the original image is reproduced.
- the holographic recording medium 12 is, in principle, a force that can be placed at an arbitrary position on the optical path of the object light. In the example of this embodiment, the holographic recording medium 12 It is to be.
- the SLM 24 is capable of emitting incident light to a predetermined optical path and controlling the emission to the predetermined optical path on a pixel-by-pixel basis.
- a pixel is said to be in an "off state" when incident light is absorbed or reflected or scattered in directions other than the predetermined optical path and cannot exit the predetermined optical path.
- the pixels in the on state are referred to as “on pixels”, and the pixels in the off state are referred to as “off pixels”.
- the SLM24 as described above is generally composed of hundreds of thousands to millions of pixels that can be switched on and off, and the ratio of the number of on-pixels to the total number of pixels is defined as “ On-pixel ratio ”is defined.
- a pixel group consisting of a part of all the pixels of the SLM 24 is considered, and the number of pixels in the ON state in the pixel group is compared with the total number of pixels included in the pixel group.
- the ratio is defined as the on-pixel ratio of the group of pixels.
- an address information area 42A consisting of 16 address pixels is formed at the upper left, and as shown in FIGS. 2B to 2D, addresses of other pages are displayed.
- the information areas 42B and 42D are formed at different positions for each of the two-dimensional information pages 40B, 40C, and 40D.
- the remaining pixels except for the address information areas 42A and 42D are data pixels, and the data areas 44A and 44D include two-dimensional information.
- the address information areas 42A-42D and the data areas 44A-44D have different on-pixel ratios so that they can be identified by a photodetector, a CCD or the like.
- the data areas 44A and 44D have an on-pixel ratio of 50% for differential encoding.
- the on-pixel ratio is set to be less than 50% or more than 50%.
- the address information areas 42A-42D are composed of 16 address pixels, if any or all of them are set as on pixels or off pixels, if they are not the same number, The on-pixel ratio will be less than 50% or more than 50%.
- the on-pixel ratio is 100%, that is, all 16 address pixels are set as on-pixels.
- the address information areas 42A to 42D are located at positions different from those of the two-dimensional information page in the figure by one pixel in a diagonally lower right direction. It is formed so as to shift. That is, the address information area 42 is formed at a different position for each two-dimensional information page.
- A, B, C, D and 3, 4, 5, and 6 are pixel address numbers in the two-dimensional information page
- A3, A4, ⁇ , D5, and D6 are the pixels of the address. 3 shows the light output at
- FIG. 12 describes the process of addressing any of the holographically recorded two-dimensional information pages.
- the object optical system 20 is configured so that the laser light is blocked by the spatial light modulator 24.
- diffracted light is generated according to the pattern recorded on the two-dimensional information page, and this is input to the CCD 34 through the Fourier lens 36. I do.
- the CCD34 reproduces a two-dimensional information page.
- the reference light is supplied by changing its incident angle (angle multiplexing), moving the holographic recording medium 12 (shift multiplexing), changing the phase modulation pattern of the reference light (phase multiplexing), and the like.
- angle multiplexing angle multiplexing
- shift multiplexing changing the phase modulation pattern of the reference light
- phase multiplexing phase multiplexing
- the corresponding address information area is a square (16 pixels) having C3 to F6 as diagonal pixels. Monitor only the central 16 pixels as described above.
- the hologram reproduced images appear one after another on the CCD 34, and only when the hologram 3 is reproduced, the sum of the detected light amounts of the monitored 16 pixels is the maximum value (in FIG. 5, When the numerical value on the vertical axis is 16, the hologram 3 can be addressed.
- the controller 38 calculates the difference between the light amounts of the block 1 and the block 3 as shown in FIG. For example, the point where the operation result becomes 0 (when crossing the horizontal axis from negative to positive) gives the target address.
- the controller 38 calculates the difference between the light amounts of the block 1 and the block 3 as shown in FIG. For example, the point where the operation result becomes 0 (when crossing the horizontal axis from negative to positive) gives the target address.
- reference numerals 48A and 48D denote address information areas in the holograms 114.
- FIG. 9 a holographic recording / reproducing apparatus 50 according to a second embodiment of the present invention shown in FIG. 9 will be described.
- the holographic recording / reproducing apparatus 50 differs from the holographic recording / reproducing apparatus 10 shown in FIG. 1 in that a photodetector 52 composed of a photodiode for receiving the diffracted light of the information light is provided.
- a plurality of two-dimensional information pages having the same position of the address information area are defined as the same two-dimensional information page group, and in the address information area within the same two-dimensional information page group, a different on-pixel arrangement is provided for each two-dimensional information page. Is different. Since other configurations are the same, description will be omitted by assigning the same reference numerals as those in FIG.
- address information areas 57A to 57D each including nine address pixels are arranged at the upper left corner in the figure.
- the address information areas 57A to 57D in the first two-dimensional information page group 56 are different from each other.
- address information areas 59A to 59D are provided on the two-dimensional information pages 58A to 58D at positions shifted by one pixel in the XY direction diagonally to the lower right.
- the two-dimensional information pages 60A and 60D constituting the third two-dimensional information page group 60 shown in FIGS. 12A and 12D are further inclined with respect to the address information area 59A and 59D.
- Address information areas 61A and 61D are provided at positions shifted by two pixels at the lower right.
- the two-dimensional information pages 62A and 62D constituting the fourth two-dimensional information page group 62 shown in FIGS. 13A to 13D further obliquely correspond to the address information areas 61A and 61D.
- the address information areas 63A-63D are respectively provided at three lower right corners (lower right corner).
- address information areas 57A, 59A, 61A, and 63A nine address pixels are all set as ON pixels (ON pixel ratio 100%).
- the address information areas 57D, 59D, 61D, and 63D all have an on-pixel ratio.
- the SLM 24 only the pixels at the address information areas 61A to 61D in the two-dimensional information page group to which the target two-dimensional information page belongs, for example, the third two-dimensional information page group 60, are set as ON pixels. Then, the object light is modulated (squeezed) to be the search light.
- the search light becomes diffracted light at the position of the holographic recording medium 12, and
- the signal is input to the photodetector 52.
- the on-pixel ratio is 100% or 78.
- the peak is upward, as shown by the solid line in FIG. 14, and at 22% or 0%, it becomes a valley as shown by the broken line. In either case, the value is less than 50% or more than 50%.
- the target two-dimensional information page is searched as belonging to the third two-dimensional information page group 60.
- the CCD 34 corresponds to the address information area in the reproduced image.
- the pixel to be scanned may be scanned from upper left to lower right.
- a target two-dimensional information page is searched from the third two-dimensional information page group 60.
- the search is performed based on the on-pixel ratio in the address information areas 61A to 61D of the two-dimensional information pages 60A to 60D constituting the third searched two-dimensional information page group 60.
- the two-dimensional information page with the on-pixel ratio of 22% is obtained from the output of the photodetector 52. All you have to do is search.
- the on-pixel ratio can be set to 10 levels, and since 9 is an odd number, the on-pixel ratio does not become 50% in all stages. . Therefore, the photodetector 52 can be sufficiently identified by a conventional detector as long as it can identify the input signal in ten steps.
- the multi-stage setting of the on-pixel ratio is also one mode of the on-pixel arrangement (described later).
- the present invention is not limited to this, and the total number of pixels and the number of address pixels may be increased or decreased according to the number of two-dimensional information pages to be recorded.
- an operation of thinning out one data pixel is performed to set the on-pixel ratio to 50%.
- the two-dimensional information page 70 is composed of NXN pixels and the address information area 72 thereof is composed of NaXNa pixels, the address information in the two-dimensional information page 70 is assumed.
- the region 72 can take (N_Na + 1) positions.
- the number of on-pixels of the address information area 72 since the permitted integer all between 0- Na 2, it is possible to gradation representation of (Na 2 + 1) street. However, if the number of pixels in the address information area 72 is an even number, the on-pixel ratio can be 50%, which is the same as in the data area.
- the number of gradation expression patterns in the address information area is expressed by the following equation (1).
- the total number of addresses when addressing only by the total detected light amount from the address information area is as follows.
- the total number of addresses for the two-dimensional information page group is (N_Na + 1).
- the total number of addresses for the above Na is as shown in FIG. 16.
- each two-dimensional information page in the two-dimensional information page group is identified by an on-pixel ratio of address pixels constituting the address information area.
- the present invention is not limited to this.
- the two-dimensional information page is determined by an on-pixel ratio and / or an on-pixel arrangement (on-pixel pattern). Let's be able to identify.
- N 1024
- 1T In order to realize a B (terabyte) recording medium, it is necessary to record at least 8 million holograms, preferably 16 million holograms.
- N_Na + l the number of addresses ( The number of on-pixel patterns) is N_Na + l.
- the light amount from the address information area is detected by the photodetector 52, and the address information area whose on-pixel ratio is less than 50% or more than 50% is two-dimensional.
- High-speed access is possible by extracting only the hologram at a specific position in the information page and then detecting the on-pixel pattern in each address information area.
- the address operation can be performed faster than in the first example of the embodiment.
- the force S that sets the minimum address information area required to represent the total number of addresses of 16 million or more to 16 pixels is S, and the address information area having a larger number of pixels is S. You can use.
- the present invention is configured as described above, an excellent effect that address information is arranged in a two-dimensional information page so that it can be detected by a simple address operation, and the two-dimensional information page can be easily identified. Having.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/562,828 US7274497B2 (en) | 2003-07-14 | 2004-06-03 | Holographic recording medium, method for adding address information to same, and method of addressing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-196278 | 2003-07-14 | ||
JP2003196278A JP4271517B2 (ja) | 2003-07-14 | 2003-07-14 | ホログラフィック記録媒体、ホログラフィック記録媒体へのアドレス情報付加方法及びアドレス方法 |
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PCT/JP2004/007693 WO2005006317A1 (ja) | 2003-07-14 | 2004-06-03 | ホログラフィック記録媒体、ホログラフィック記録媒体へのアドレス情報付加方法及びアドレス方法 |
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US (1) | US7274497B2 (ja) |
JP (1) | JP4271517B2 (ja) |
WO (1) | WO2005006317A1 (ja) |
Cited By (3)
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WO2008082063A1 (en) * | 2007-01-05 | 2008-07-10 | Samsung Electronics Co., Ltd. | Holographic storage medium, and method and apparatus for recording/reproducing data on/from the holographic storage medium |
WO2008091048A1 (en) * | 2007-01-26 | 2008-07-31 | Samsung Electronics Co., Ltd. | Method of and apparatus for recording/reproducing data on/from holographic storage medium |
US7692835B2 (en) * | 2005-08-30 | 2010-04-06 | Sony Corporation | Hologram recording apparatus, hologram recording method, and hologram recording medium |
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JP2005251241A (ja) * | 2004-03-01 | 2005-09-15 | Tdk Corp | ホログラム検索方法及びホログラフィック記録再生装置 |
JP2006201467A (ja) * | 2005-01-20 | 2006-08-03 | Fujitsu Ltd | ホログラム記録再生装置、その記録方法、再生方法およびホログラム記録媒体 |
JP4738935B2 (ja) * | 2005-08-04 | 2011-08-03 | 富士通株式会社 | ホログラム記録方法およびホログラム記録装置 |
JP4426520B2 (ja) * | 2005-11-15 | 2010-03-03 | 富士通株式会社 | ホログラム記録再生装置およびホログラム記録再生方法 |
JP2007240581A (ja) * | 2006-03-06 | 2007-09-20 | Fujitsu Ltd | ホログラム記録装置 |
KR101336247B1 (ko) * | 2007-02-23 | 2013-12-03 | 삼성전자주식회사 | 기록 재생 방법 및 기록 재생 장치 및 홀로그래픽 정보저장 매체 |
WO2009051775A1 (en) * | 2007-10-18 | 2009-04-23 | Stx Aprilis, Inc. | Optical system and method for content addressable search and information retrieval in a holographic data storage system |
KR100999099B1 (ko) * | 2009-02-12 | 2010-12-08 | 성균관대학교산학협력단 | 홀로그래피 광메모리 시스템에서의 데이터 기록 방법 |
WO2012032612A1 (ja) * | 2010-09-08 | 2012-03-15 | 株式会社 東芝 | ホログラム記録再生装置 |
WO2015011744A1 (ja) * | 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 | 光情報記録装置、光情報再生装置、光情報記録方法および再生位置ずれ検出方法 |
JP6481433B2 (ja) * | 2015-03-12 | 2019-03-13 | 凸版印刷株式会社 | 記録媒体及び方法 |
KR102449369B1 (ko) * | 2015-12-07 | 2022-10-04 | 삼성디스플레이 주식회사 | 표시 장치 및 표시 장치의 검사 방법 |
CN106873340B (zh) * | 2017-03-17 | 2019-07-05 | 京东方科技集团股份有限公司 | 空间光调制器的寻址方法、全息显示装置及其控制方法 |
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- 2003-07-14 JP JP2003196278A patent/JP4271517B2/ja not_active Expired - Lifetime
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- 2004-06-03 US US10/562,828 patent/US7274497B2/en not_active Expired - Fee Related
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JPH11509954A (ja) * | 1996-05-10 | 1999-08-31 | クウォンタム・コーポレイション | 体積ホログラフィ記憶媒体のための位置フィードバックシステム |
JPH1097792A (ja) * | 1996-06-26 | 1998-04-14 | Lucent Technol Inc | ホログラフィック記憶システムでデータを読み出す方法 |
Cited By (5)
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US7692835B2 (en) * | 2005-08-30 | 2010-04-06 | Sony Corporation | Hologram recording apparatus, hologram recording method, and hologram recording medium |
WO2008082063A1 (en) * | 2007-01-05 | 2008-07-10 | Samsung Electronics Co., Ltd. | Holographic storage medium, and method and apparatus for recording/reproducing data on/from the holographic storage medium |
US7929397B2 (en) | 2007-01-05 | 2011-04-19 | Samsung Electronics Co., Ltd. | Holographic storage medium, and method and apparatus for recording/reproducing data on/from the holographic storage medium |
WO2008091048A1 (en) * | 2007-01-26 | 2008-07-31 | Samsung Electronics Co., Ltd. | Method of and apparatus for recording/reproducing data on/from holographic storage medium |
US7821692B2 (en) | 2007-01-26 | 2010-10-26 | Samsung Electronics Co., Ltd. | Method of and apparatus for recording/reproducing data on/from holographic storage medium |
Also Published As
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US7274497B2 (en) | 2007-09-25 |
US20070008598A1 (en) | 2007-01-11 |
JP4271517B2 (ja) | 2009-06-03 |
JP2005031395A (ja) | 2005-02-03 |
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