WO2006080061A1 - ホログラム記録装置 - Google Patents
ホログラム記録装置 Download PDFInfo
- Publication number
- WO2006080061A1 WO2006080061A1 PCT/JP2005/001073 JP2005001073W WO2006080061A1 WO 2006080061 A1 WO2006080061 A1 WO 2006080061A1 JP 2005001073 W JP2005001073 W JP 2005001073W WO 2006080061 A1 WO2006080061 A1 WO 2006080061A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- hologram recording
- optical element
- hologram
- recording apparatus
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 83
- 230000001427 coherent effect Effects 0.000 claims abstract description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
- G03H1/0404—In-line recording arrangement
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1395—Beam splitters or combiners
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
- G11C13/042—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using information stored in the form of interference pattern
-
- 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
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
-
- 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
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
- G03H2001/0415—Recording geometries or arrangements for recording reflection holograms
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2223/00—Optical components
- G03H2223/13—Phase mask
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2223/00—Optical components
- G03H2223/17—Element having optical power
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2225/00—Active addressable light modulator
- G03H2225/20—Nature, e.g. e-beam addressed
- G03H2225/24—Having movable pixels, e.g. microelectromechanical systems [MEMS]
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2250/00—Laminate comprising a hologram layer
- G03H2250/42—Reflective layer
-
- 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 a hologram recording apparatus for recording a hologram on a hologram recording medium using, for example, a laser beam.
- FIG. 9 shows a conventional hologram recording apparatus (see Patent Document 1 below).
- the illustrated hologram recording apparatus includes a laser light source 100, a collimator lens 200, first and second beam splitters 300A and 300B, a reflector 310, a spatial light modulator 400, a two-dimensional detector 500, a recording light and a reproducing light.
- a dual purpose objective lens 600, a prism 700, and a reference light objective lens 7 10 are provided.
- the spatial light modulator 400 is a liquid crystal device that can selectively transmit light.
- the objective lenses 600 and 710 and the prism 700 are incorporated in the head unit 800.
- the head unit 800 is controlled by the driving means 810 in terms of the interval and inclination with respect to the hologram recording medium B.
- a light beam with a laser light source of 100 passes through the collimator lens 200 and enters the first beam splitter 300A.
- the incident light beam is separated into transmitted light and reflected light.
- the transmitted light travels straight to the spatial light modulator 400 and is modulated by the spatial light modulator 400 into recording light having two-dimensional information.
- This recording light is applied to the hologram recording medium B through the second beam splitter 300B and the objective lens 600.
- the reflected light is used as reference light that interferes with the recording light.
- the reference light reaches the hologram recording medium B through an optical path L2 different from the optical path L1 of the recording light by the reflecting plate 310, the prism 700, and the objective lens 710.
- a hologram is recorded on the recording layer 92 of the hologram recording medium B by the interference between the recording light and the reference light.
- the hologram recording medium B is irradiated with only the reference light without being driven by the spatial light modulator 400 S.
- the hologram recording medium B emits reproduction light when the reference light strikes the hologram of the recording layer 92.
- This reproduced light is received by the two-dimensional detector 500 through the objective lens 600 and the second beam splitter 300B.
- the hologram recording medium B is recorded as a hologram. Information is played back.
- Patent Document 1 Japanese Patent Laid-Open No. 9-305978
- the optical path L1 of the recording light and the optical path L2 of the reference light are spatially separated, there is a problem that the optical system becomes complicated. For example, since the recording light and the reference light cross and interfere with each other at a relatively large predetermined angle, the two objective lenses 600 and 710 must be accurately aligned and assembled to the head unit 800. Nare ,.
- An object of the present invention is to provide a hologram recording apparatus that can simplify an optical system.
- the present invention takes the following technical means.
- a hologram recording apparatus includes a light source that emits a coherent light beam, a spatial light modulator that modulates a part of the light beam from the light source into recording light having two-dimensional information, and A hologram recording apparatus that uses the other part of the luminous flux as reference light that interferes with the recording light, and irradiates the recording light and the reference light toward the hologram recording medium.
- a part of the light flux is transmitted to the spatial light modulator as transmitted light between the spatial light modulator and the other part of the light flux as reflected light to the hologram recording medium.
- a translucent optical element is disposed, and the recording light and the reference light are separated as transmitted light and reflected light by the optical element and then passed through the same optical path to record the hologram.
- the medium is irradiated It is configured to.
- the recording light passes through the optical element and is modulated by the spatial light modulator, and then passes again through the optical element in the reverse direction to travel along the optical path. Is reflected by the optical element and then travels along the optical path together with the recording light to reach the hologram recording medium.
- the light beam is transmitted as transmitted light to the optical element, and the recording light and reference light returned from the optical element are reflected light.
- a beam splitter to advance to the hologram recording medium as Has been placed.
- the spatial light modulator is not driven so that only the reference light is irradiated onto the hologram recording medium.
- the hologram recording medium is It is equipped with a two-dimensional detector that receives the light transmitted through the beam splitter and reads the information recorded as holograms on the hologram recording medium.
- the optical element includes a half mirror having an incident surface on which a dielectric film is formed, and the spatial light modulator includes a deformable mirror device.
- the emission surface of the optical element facing the spatial light modulator is formed in a curved surface shape.
- a phase plate is arranged between the optical element and the spatial light modulator.
- the optical element is a half mirror having an incident surface on which a dielectric film is formed
- the spatial light modulator is a liquid crystal device.
- a reflecting plate is arranged so that light transmitted through the spatial light modulator is reflected and transmitted again in the opposite direction. Is placed.
- a phase plate is disposed between the spatial light modulator and the reflecting plate or between the optical element and the spatial light modulator.
- FIG. 1 is a configuration diagram of a hologram recording apparatus according to a first embodiment of the present invention.
- FIG. 2 is a diagram showing a reproduction state of the hologram recording apparatus shown in FIG.
- FIG. 3 is a cross-sectional view of main parts of the hologram recording apparatus shown in FIG.
- FIG. 4 is a cross-sectional view of main parts of a hologram recording apparatus according to a second embodiment of the present invention.
- FIG. 5 is a cross-sectional view of main parts of a hologram recording apparatus according to a third embodiment of the present invention.
- FIG. 6 is a configuration diagram of a hologram recording apparatus according to a fourth embodiment of the present invention.
- FIG. 7 is a cross-sectional view of main parts of the hologram recording apparatus shown in FIG.
- FIG. 8 is a cross-sectional view of main parts of a hologram recording apparatus according to a fifth embodiment of the present invention.
- FIG. 9 is a configuration diagram of a conventional hologram recording apparatus.
- FIG. 11 shows a first embodiment of a hologram recording apparatus according to the present invention.
- FIG. 1 shows a state during recording
- FIG. 2 shows a state during reproduction.
- the hologram recording apparatus A1 includes a light source 1, a collimator lens 2, a beam splitter 3, a semi-transparent optical element 4, a spatial light modulator 5A, and a two-dimensional A detector 6 and an objective lens 7 are provided.
- the objective lens 7 is incorporated in the head unit 8.
- the head unit 8 is controlled to be tilted with respect to the hologram recording medium B by the driving means 8a.
- the hologram recording medium B is configured by laminating a substrate 90, a reflective film 91, a recording layer 92, and a protective film 93. In the recording layer 92 of the hologram recording medium B, the hologram is recorded by the interference between the recording light and the reference light.
- the light source 1 is made of a semiconductor laser element, for example. During recording and playback, the light source 1 emits a coherent laser beam with a relatively narrow band.
- the collimator lens 2 converts the laser light emitted from the light source 1 into a parallel light beam.
- the laser beam that has become a parallel light flux enters the beam splitter 3.
- the beam splitter 3 is disposed between the light source 1 and the optical element 4.
- the beam splitter 3 causes the incident light beam coming from the light source 1 to travel straight to the optical element 4 as transmitted light, and reflects almost all the light returning from the optical element 4 side at right angles. The reflected light travels to objective lens 7.
- the optical element 4 is made of a half mirror and has an incident surface 40 on which a dielectric film is formed.
- the optical element 4 is disposed between the beam splitter 3 and the spatial light modulator 5A with the incident surface 40 facing the beam splitter 3 side. A part of the incident light beam passes through the optical element 4 and travels straight to the spatial light modulator 5A, and another part of the incident light beam is reflected by the incident surface 40 and returns to the beam splitter 3. The transmitted light and reflected light separated by the optical element 4 become recording light and reference light, respectively.
- the spatial light modulator 5 is composed of a DMD (Deformable Mirror Device) and is driven only during recording. This spatial light modulator 5 selectively reflects the light transmitted through the optical element 4 to Modulate to recording light with dimensional information. The recording light emitted from the spatial light modulator 5 passes through the optical element 4 in the reverse direction again and returns to the beam splitter 3.
- DMD Deformable Mirror Device
- the two-dimensional detector 6 includes, for example, a CCD area sensor or a CMOS area sensor, and is driven mainly during reproduction.
- the two-dimensional detector 6 converts the received reproduction light into a digital signal, and reads the two-dimensional information recorded as a hologram on the hologram recording medium B.
- the objective lens 7 is disposed between the beam splitter 3 and the hologram recording medium B.
- the recording light and the reference light are condensed on the objective lens 7 through the same optical path L from the beam splitter 3 as shown in FIG.
- the recording light and the reference light are irradiated by the objective lens 7 so as to interfere with each other on the recording layer 92 of the hologram recording medium B.
- a hologram is recorded on the recording layer 92.
- only the reference light is focused on the objective lens 7 through the optical path L.
- the hologram recording medium B is irradiated with the reference light.
- the hologram recording medium B emits reproduction light when the reference light strikes the hologram of the recording layer 92. This reproduced light travels in the direction opposite to the reference light through the objective lens 7 to the beam splitter 3, passes straight through the beam splitter 3, and is received by the two-dimensional detector 6. As a result, information recorded as a hologram is read out.
- the light beam emitted from the light source 1 passes through the collimator lens 2 and passes straight through the beam splitter 3 and enters the optical element 4.
- a part of the incident light beam in the optical element 4 is transmitted through the incident surface 40 and becomes transmitted light, and enters the spatial light modulator 5A.
- the other part of the incident light beam is reflected by the incident surface 40 and enters the beam splitter 3 as reference light.
- the light incident on the spatial light modulator 5A is modulated by being reflected and absorbed for each pixel.
- the light modulated by the spatial light modulator 5A becomes recording light having two-dimensional information.
- the recording light again passes through the optical element 4 in the reverse direction and enters the beam splitter 3.
- the recording light passes through the optical element 4 and proceeds to the beam splitter 3. After being refracted substantially at a right angle, the hologram recording medium B is irradiated through the objective lens 7.
- the reference light is also reflected by the optical element 4, proceeds to the beam splitter 3, is refracted substantially at a right angle by the beam splitter 3, and is irradiated to the hologram recording medium B through the objective lens 7. That is, the recording light and the reference light are irradiated onto the hologram recording medium B through the same optical path L.
- the wavefront of the reference light is monotonically reflected to form a phase-matched surface, while the wavefront of the recording light is modulated by the spatial light modulator 5A.
- the phase is uneven. Therefore, although the recording light and the reference light are irradiated onto the hologram recording medium B through the same optical path L, they interfere efficiently in the recording layer 92. As a result, a hologram having two-dimensional information is recorded on the recording layer 92.
- the light beam emitted from the light source 1 enters the optical element 4 through the collimator lens 2 and the beam splitter 3, and is converted into transmitted light and reflected light by the optical element 4. To be separated.
- the spatial light modulator 5A is not driven and absorbs all incident light flux, only the reference light that is reflected by the optical element 4 passes through the optical path L and irradiates the hologram recording medium B. Is done.
- the hologram recording medium B emits reproduction light when the reference light strikes the hologram of the recording layer 92. This reproduced light passes through the objective lens 7 in the direction opposite to the reference light, and then passes straight through the beam splitter 3 and is received by the two-dimensional detector 6. Thereby, information recorded as a hologram on the recording layer 92 of the hologram recording medium B is reproduced.
- the light source 1 to the objective lens 7 are The optical system can be simplified.
- the objective lens 7 constituting the optical system is
- the objective lens 7 can be easily assembled to the head unit 8 because the recording light and the reference light are also used.
- FIGS. 4-18 show another embodiment of a hologram recording apparatus according to the present invention.
- the same reference numerals are given to the same or similar components as those in the first embodiment. Since the components not shown in these drawings are the same as those in the first embodiment, the same reference numerals are given and the description thereof is omitted.
- FIG. 4 shows a cross-sectional view of a main part of the hologram recording apparatus according to the second embodiment.
- the exit surface 41 of the optical element 4 is formed in a convex shape.
- the recording light is transmitted through the convex emission surface 41 in both directions, so that the recording light becomes more easily optically interfered with the reference light.
- Such recording light is also applied to the hologram recording medium B through the same optical path L as the reference light.
- the wavefront of the recording light and the wavefront of the reference light easily interfere with each other, and a hologram can be recorded more efficiently. Even if the exit surface of the optical element is concave, the same effect is obtained.
- FIG. 5 shows a cross-sectional view of the main part of the hologram recording apparatus according to the third embodiment.
- the phase plate 4 ⁇ is disposed between the optical element 4 and the spatial light modulator 5 ⁇ .
- the phase plate 4 ⁇ gives a predetermined phase difference to the recording light, thereby making the wave front of the recording light more uneven in phase.
- Such recording light also irradiates the hologram recording medium ⁇ ⁇ through the same optical path L as the reference light.
- the wavefront of the recording light and the wavefront of the reference light easily interfere with each other, and the hologram can be recorded more efficiently.
- the spatial light modulator 5 ⁇ is a liquid crystal device.
- a reflector 5C is disposed on the side of the spatial light modulator 5 ⁇ opposite to the side facing the optical element 4.
- the spatial light modulator 5 ⁇ modulates the recording light having two-dimensional information by selectively transmitting the light transmitted through the optical element 4 as indicated by the broken line in FIG.
- the recording light that passes through the spatial light modulator 5 ⁇ and travels toward the reflecting plate 5C is reflected by the reflecting plate 5C, and then passes again through the spatial light modulator 5 ⁇ , and further passes through the optical element 4 and passes through the beam splitter.
- the recording light and the reference light are irradiated through the same optical path L, and the optical system from the light source 1 to the objective lens 7 is simplified. You can.
- FIG. 8 shows a hologram recording apparatus according to the fifth embodiment.
- the same components as those in the fourth embodiment are provided, and a phase plate 4 ⁇ is disposed between the spatial light modulator 5 ⁇ and the reflection plate 5C.
- Spatial light as shown by the dashed line in Figure 8
- the recording light traveling from the modulator 5B to the reflecting plate 5C is given a predetermined phase difference by the phase plate 4A. Accordingly, even with the hologram recording apparatus of the fifth embodiment, the wavefront of the recording light and the wavefront of the reference light easily interfere with each other, and the hologram can be recorded more efficiently. Note that the same effect can be obtained by arranging the phase plate between the optical element and the spatial light modulator.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB200580047395XA CN100530000C (zh) | 2005-01-27 | 2005-01-27 | 全息图记录装置 |
EP05704179A EP1843223A4 (en) | 2005-01-27 | 2005-01-27 | HOLOGRAM RECORDING DEVICE |
PCT/JP2005/001073 WO2006080061A1 (ja) | 2005-01-27 | 2005-01-27 | ホログラム記録装置 |
JP2007500374A JPWO2006080061A1 (ja) | 2005-01-27 | 2005-01-27 | ホログラム記録装置 |
US11/880,129 US20070263268A1 (en) | 2005-01-27 | 2007-07-20 | Hologram recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/001073 WO2006080061A1 (ja) | 2005-01-27 | 2005-01-27 | ホログラム記録装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/880,129 Continuation US20070263268A1 (en) | 2005-01-27 | 2007-07-20 | Hologram recording device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006080061A1 true WO2006080061A1 (ja) | 2006-08-03 |
Family
ID=36740096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/001073 WO2006080061A1 (ja) | 2005-01-27 | 2005-01-27 | ホログラム記録装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070263268A1 (ja) |
EP (1) | EP1843223A4 (ja) |
JP (1) | JPWO2006080061A1 (ja) |
CN (1) | CN100530000C (ja) |
WO (1) | WO2006080061A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1895520A2 (en) * | 2006-09-01 | 2008-03-05 | Thomson Licensing | Holographic storage system using destructive interference for pixel detection |
US8189249B2 (en) | 2006-09-01 | 2012-05-29 | Thomson Licensing | Holographic storage system using destructive interference for pixel detection |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11311937A (ja) * | 1998-02-27 | 1999-11-09 | Hideyoshi Horigome | 光情報記録装置および方法ならびに光情報再生装置および方法 |
JP2004030734A (ja) * | 2002-06-24 | 2004-01-29 | Optware:Kk | 光ピックアップ装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69941481D1 (de) * | 1998-02-27 | 2009-11-12 | Optware Corp | Verfahren und vorrichtung für optische informationen, verfahren und vorrichtung zur wiedergabe von optischen informationen, vorrichtung zur aufzeichnung, wiedergabe von optischen informationen sowie optisches informationsaufzeichnungsmedium |
HU9801029D0 (en) * | 1998-05-05 | 1998-06-29 | Optilink Ab | Method and system for recording information on a holographic card |
HUP9802755A3 (en) * | 1998-11-27 | 2002-05-28 | Optilink Ab | Holographic chip and optical system for the holographic chip |
JP3639212B2 (ja) * | 2000-12-11 | 2005-04-20 | 株式会社オプトウエア | 光情報記録方法 |
US7149014B2 (en) * | 2003-04-18 | 2006-12-12 | California Institute Of Technology | Holographic memory using beam steering |
US7903309B2 (en) * | 2003-05-13 | 2011-03-08 | Optware Corporation | Optical informational recording/reproduction device and method |
JP4474513B2 (ja) * | 2003-07-08 | 2010-06-09 | 新オプトウエア株式会社 | 光情報再生装置および光情報記憶再生装置 |
JP2005292765A (ja) * | 2004-03-09 | 2005-10-20 | Samsung Electronics Co Ltd | ホログラムメモリ媒体および記録装置、再生装置 |
-
2005
- 2005-01-27 WO PCT/JP2005/001073 patent/WO2006080061A1/ja active Application Filing
- 2005-01-27 CN CNB200580047395XA patent/CN100530000C/zh not_active Expired - Fee Related
- 2005-01-27 EP EP05704179A patent/EP1843223A4/en not_active Withdrawn
- 2005-01-27 JP JP2007500374A patent/JPWO2006080061A1/ja not_active Withdrawn
-
2007
- 2007-07-20 US US11/880,129 patent/US20070263268A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11311937A (ja) * | 1998-02-27 | 1999-11-09 | Hideyoshi Horigome | 光情報記録装置および方法ならびに光情報再生装置および方法 |
JP2004030734A (ja) * | 2002-06-24 | 2004-01-29 | Optware:Kk | 光ピックアップ装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1843223A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1895520A2 (en) * | 2006-09-01 | 2008-03-05 | Thomson Licensing | Holographic storage system using destructive interference for pixel detection |
EP1895520A3 (en) * | 2006-09-01 | 2010-12-29 | Thomson Licensing | Holographic storage system using destructive interference for pixel detection |
US8189249B2 (en) | 2006-09-01 | 2012-05-29 | Thomson Licensing | Holographic storage system using destructive interference for pixel detection |
Also Published As
Publication number | Publication date |
---|---|
EP1843223A4 (en) | 2009-07-29 |
CN100530000C (zh) | 2009-08-19 |
EP1843223A1 (en) | 2007-10-10 |
US20070263268A1 (en) | 2007-11-15 |
JPWO2006080061A1 (ja) | 2008-06-19 |
CN101111805A (zh) | 2008-01-23 |
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