WO2005066877A1 - ホログラフィック記録方法及びホログラフィック記録装置 - Google Patents
ホログラフィック記録方法及びホログラフィック記録装置 Download PDFInfo
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- WO2005066877A1 WO2005066877A1 PCT/JP2004/019072 JP2004019072W WO2005066877A1 WO 2005066877 A1 WO2005066877 A1 WO 2005066877A1 JP 2004019072 W JP2004019072 W JP 2004019072W WO 2005066877 A1 WO2005066877 A1 WO 2005066877A1
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- Prior art keywords
- light
- holographic recording
- exposure
- pixel
- exposure time
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 230000010287 polarization Effects 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 206010047571 Visual impairment Diseases 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/28—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique superimposed holograms only
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
-
- 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
-
- 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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/128—Modulators
-
- 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
- G03H1/16—Processes or apparatus for producing holograms using Fourier transform
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H2001/2655—Time multiplexing, i.e. consecutive records wherein the period between records is pertinent per se
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/20—2D object
- G03H2210/22—2D SLM object wherein the object beam is formed of the light modulated by the SLM
-
- 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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K2019/06215—Aspects not covered by other subgroups
- G06K2019/0629—Holographic, diffractive or retroreflective recording
Definitions
- the present invention relates to a holographic recording method and apparatus for irradiating a holographic recording medium with object light and reference light, and recording a data page on the recording layer by interference fringes.
- a digital page to be recorded is converted into a two-dimensional bitmap pattern, and this pattern is applied to object light as intensity modulation of light, thereby obtaining a data page.
- object light as intensity modulation of light
- a method of forming a gray scale there are a method of dividing the contrast of intensity modulation, a method of dividing the exposure time, and a method of combining these.
- the above gray scale is used for DVD (digital versatile disc) and the like. It can be applied not only to bit-by-bit digital data recording but also to page-type data such as holographic memory.
- the intensity distribution of the laser beam emitted from the laser light source in the beam diameter is generally close to a Gaussian distribution
- the object light propagated by the object optical system is also a Gaussian distribution.
- the imaging device has fixed noise that does not depend on the amount of light detected, if the darkened pixels are enhanced, the fixed noise is also enhanced, and the SNR of the image is reduced. There are points.
- the method of dividing the intensity modulation contrast as a method of forming the gray scale is such that the spatial light modulator as the intensity modulation means is limited to a polarization control type device (such as a liquid crystal display). Consequently, a direct reflection type spatial light modulator such as a DMD (digital mirror device) cannot be used.
- a polarization control type device such as a liquid crystal display
- the apodization technique described in HJ Coufal et al Uses a lens or other optical component to redistribute the Gaussian distribution of beam intensity, thereby forming a step-like function in the beam radial direction. Although the intensity distribution is used, there are problems that the optical components are expensive and the degree of freedom of the optical system is limited.
- the present invention has been made in view of the above problems, and uses a reflective spatial light modulator that modulates the intensity of object light to two gradations of ON and OFF to perform grayscale multi-step recording.
- An object of the present invention is to provide a holographic recording method and apparatus that can be realized. It is another object of the present invention to provide a holographic recording method and apparatus capable of performing apodization without using expensive optical components.
- a reflection type spatial light modulator including a digital aperture mirror device is used to divide the exposure time.
- Another advantage was the ability to achieve grayscale multi-tone recording.
- a holoradiographic recording method characterized in that time is divided by an integer N, and gradation exposure is performed in (N + 1) steps.
- the one-time pulse exposure for the exposure time t is performed by pulsing the object light.
- the beam intensity distribution of the object light immediately before the reflection is divided into (N + 1) -stage regions, and the beam intensity distribution of the object light after the reflection is substantially uniform.
- the number of exposures at time t within the exposure time t is controlled for each of the regions (1),
- a laser light source a first polarizing beam splitter that splits the laser light from the laser light source into object light and reference light, and an object light that guides the object light to a holographic recording medium
- a reference optical system that guides the reference light to the holographic recording medium
- the object optical system includes a second polarizing beam splitter that transmits or reflects the object light, The object light transmitted through the second polarizing beam splitter is modulated in intensity for each pixel of the data page to be recorded, and is exposed in the direction toward the second polarizing beam splitter or in a different non-exposure direction.
- a reflective spatial light modulator that can selectively reflect light, and a 1Z4 wavelength plate disposed on an optical path between the second polarizing beam splitter and the reflective spatial light modulator,
- the object light and the reference light reflected by the reflective spatial light modulator and the second polarizing beam splitter interfere with each other in the holographic recording medium
- the reflective spatial light modulator includes: Data page When the exposure time required to expose substantially 100% of the area of the recording layer corresponding to one pixel is t, one exposure
- time t is a time obtained by dividing the above-mentioned t by an integer N of 2 or more, a small time within the exposure time t is obtained.
- a holographic recording apparatus characterized in that it can be reflected in the exposure direction at least N times.
- the reflective spatial light modulator is characterized in that the reflective spatial light modulator is constituted by a micromirror device in which micromirrors capable of switching and controlling the reflection direction for each pixel of the data page are arranged.
- the holographic recording device according to (1) is characterized in that the reflective spatial light modulator is constituted by a micromirror device in which micromirrors capable of switching and controlling the reflection direction for each pixel of the data page are arranged.
- the laser light source is substantially equal to one exposure time t in the reflective spatial light modulator.
- a laser beam is passed between the laser light source and the first polarizing beam splitter with a pulse width substantially equal to one exposure time t in the reflective spatial light modulator, and
- the holographic recording apparatus according to (5) or (6), further comprising a beam cutoff unit for cutting off between pulses.
- the control device controls the exposure time t for each pixel so that the beam intensity distribution after reflection by the reflective spatial light modulator becomes substantially uniform.
- the holographic recording device according to any one of (5) to (8), wherein the number of times of exposure within 0 is controlled.
- the control device is configured to control a beam intensity of the object light immediately before the light enters the reflective spatial light modulator.
- the number of exposures is controlled so that the beam intensity of the object light after the reflection becomes substantially uniform based on the beam intensity distribution information of each region when the intensity distribution is divided into (N + 1) -stage regions.
- FIG. 1 is an optical system diagram showing a holographic recording device according to a first embodiment of the present invention.
- FIG. 2 is a schematic diagram showing an example of a data page to be recorded by the device of Example 1
- FIG. 3 is a schematic view showing the state of exposure reflection and non-exposure reflection of a micromirror during the first divisional exposure in the DMD of Example 1.
- FIG. 4 is a schematic diagram showing the state of the second-time exposure reflection and non-exposure reflection
- FIG. 5 A diagram showing the process of exposure reflection by a specific micromirror of the DMD along the time axis
- FIG. 6 is a diagram showing an apodization method according to a second embodiment of the present invention in terms of a relationship between exposure intensity and time.
- FIG. 7 is a schematic diagram showing the distribution of the amount of reflected light at the DMD corresponding to the pixels of the data page when the number of exposures is adjusted by the method of the second embodiment.
- FIG. 8 is a schematic diagram showing a data page recorded by the method of Example 2.
- FIG. 9 is a diagram showing a light intensity distribution at a beam diameter of a general laser beam.
- the object light in the object optical system is exposed to the holographic recording medium in the exposure direction or non-exposure that does not enter the holographic recording medium, for each pixel, corresponding to the data page to be recorded.
- the exposure time required to make one pixel in the data database an ON pixel is represented by t, control is performed so that light is selectively reflected in the
- the exposure time t due to reflections is defined as the time obtained by dividing the above t by an integer N of 2 or more, and (N +
- the above object is achieved by performing the gradation exposure in step 1).
- the holographic recording device 10 includes a laser light source 12 and a laser beam from the laser light source 12.
- a first polarization beam splitter 14 for splitting the first light into an object light and a reference light;
- An optical system 18 for guiding the reference light, which is, for example, s-polarized light, reflected by the first polarization beam splitter 14 to the holographic recording medium 16; and
- the imaging system is provided with an imaging optical system 22 for reproducing a data page from the diffracted light generated in 16 and a control device 24.
- the object optical system 18 includes a beam expander 18A for expanding the beam diameter of the p-polarized light transmitted through the first polarization beam splitter 14, and a beam diameter by the beam expander 18A.
- a second polarization beam splitter 18B which transmits p-polarized light and s-polarized light that are enlarged, and an optical path of the object light transmitted through the second polarization beam splitter 18B.
- the 1Z4 wavelength plate 18C that modulates the phase of the object light by ⁇ 4, and the object light transmitted through the 1Z4 wavelength plate 18C is passed through the 1Z4 wavelength plate 18C and the second polarizing beam splitter 18B for each pixel of the data page.
- Spatial light modulation (Digital micromirror) 18D which is a reflector, and the object light reflected by the DMD 18D, transmitted through the 1Z4 wavelength plate 18C in the opposite direction, and reflected by the second polarizing beam splitter 18B.
- a Fourier lens 18E focused on the holographic recording medium 16 in the vicinity thereof.
- the reference optical system 20 is configured to include a mirror 20 ⁇ ⁇ ⁇ that reflects the s-polarized reference light reflected by the first polarization beam splitter 14 toward the holographic recording medium 16. I have.
- the imaging optical system 22 includes a mirror 22 # that laterally reflects the diffracted light generated from the holographic recording medium 16, an image sensor 22 #, and a diffracted light reflected by the mirror 22 #. And an image forming lens 22C for forming an image on a 22 ° light receiving surface.
- the laser light emitted from the laser light source 12 is split in the first polarization beam splitter 14 into p-polarized object light passing therethrough and s-polarized reference light reflected therefrom.
- the reference light is reflected by the mirror 20A and enters the holographic recording medium 16 while maintaining the s-polarized light.
- the object light is expanded in its beam diameter by a beam expander 18 A in the object optical system 18, then enters the second polarization beam splitter 18 B, transmits this as p-polarized light, and The light reaches the DMD 18D via the wave plate 18C.
- the micromirror is controlled for each pixel by the control device 24, and three-level gradation display (details will be described later) is performed.
- the 1Z4 wave plate 18C is placed with its optical axis inclined at 45 ° with respect to the plane of oscillation of the p-polarized light, and the object light reflected in the exposure direction by the DMD 18D passes through the 1Z4 wave plate 18C.
- a phase shift of ⁇ 2 is generated by adding the phase shift ⁇ 4 at the time of incidence on the DMD 18D and the phase shift ⁇ 4 at the time of reflection, becomes s-polarized light, and enters the second polarization beam splitter 18B.
- the second polarization beam splitter 18B reflects the s-polarized light
- the object light as the s-polarized light is reflected in the direction of the Fourier lens 18E, Fourier-transformed by the Fourier lens 18E, and near the holographic recording medium 16. And converges to the focus of the data page, where it interferes with the reference light, thereby recording the data page as interference fringes.
- the DMD 18D which is the reflection type spatial light modulator, is provided with a microphone opening mirror capable of controlling the reflection direction, and the controller 24 determines the reflection angle for each micro mirror by the exposure device. Direction is switched to the non-exposure direction.
- the exposure time t by one reflection in the exposure direction is equivalent to one pixel of the data page.
- control device 24 sets the integer N for dividing the exposure time t to 2,
- each pixel in the bitmap image is displayed in three gradation levels as a target value.
- white pixels reflect ON the object light in the direction of the second polarizing beam splitter 18B, ie, the exposure direction, while black pixels reflect the object light in a direction different from the exposure direction.
- OFF pixels and gray pixels to be turned on or off shall display gray scale pixels at an intermediate stage between the two.
- the bitmap image shown in FIG. Exposure is performed by dividing the exposure time into two times for the bitmap image shown in (2), and the sum is the state (target value) of the bitmap image shown in Fig. 2.
- FIG. 5 shows the relationship between the amount of propagation light and time in the case of pixels E4 and C3 in FIG.
- the second exposure is performed at the next exposure time t shown in Fig. 4 (A), and the pulse interval time t
- the exposure time t was exposed as shown in Fig. 3 (B), and the exposure time was as shown in Fig. 4 (B), Fig. 3 (C) and Fig.
- the subsequent exposures reduce the state of ON pixels, gray pixels, and OFF pixels as shown in pixels E4 in FIGS. 2 (A), (B) and (C).
- the pixel C3 is displayed in the order of a gray pixel, an OFF pixel, and an ON pixel.
- a data page which is a data image, is represented by three gradations of ON pixels, gray pixels, and OFF pixels! /, So that one data page is used twice. Force recorded by exposure time irradiation If there is room in the SMR of the reproduction data page, more gradations can be obtained. That is, the time obtained by dividing the exposure time t by an integer N of 2 or more.
- the exposure to the holographic recording medium 16 is performed at the time t between (A) and (B) and further between (B) and (C). Is not done
- the object light may be controlled in a pulse shape.
- a pulse control device 13 for performing pulse control of the laser light source 12 is provided, and a pulse time substantially equal to one exposure time t in the DMD 18D is provided.
- the pulse width of the laser light source 12 may be set to a pulse width.
- the pulse controller 13 and the controller 24 need to be synchronized.
- a beam cut-off means 26A having a force such as an electromagnetic shutter is provided between the laser light source 12 and the first polarization beam splitter 14, or Alternatively, the laser light or the object light may be turned ON / OFF in synchronization with the DMD 18D by interposing the object optical system 18! / ⁇ .
- the beam cutoff means 26A is provided immediately after the laser light source 12, or if the laser light source 12 emits pulse light by the pulse control device 13, useless exposure by the reference light can be avoided. Preferred, if the laser light source 12 emits pulse light by the pulse control device 13, useless exposure by the reference light can be avoided. Preferred,.
- the exposure time of the reflective spatial light modulator can be reduced without using expensive optical components.
- the present invention relates to a method for making the intensity distribution uniform using apodization by division.
- the beam center force is also outward in the radial direction of the beam diameter.
- the amount of light (light intensity) is in the order of area a ;, ⁇ , ⁇ , and ⁇ , in the order of ( ⁇ 1 ⁇ ) ⁇ ( ⁇ — ⁇
- the number of times of the exposure time t in the DMD 18D is, for example, small (one time) in the region a and the region j8 corresponding to the regions ⁇ - ⁇ of the respective light intensities.
- the exposure intensity is increased twice, three times, and four times in the order of 1, y, and ⁇ to make the distribution of the exposure intensity in the holographic recording medium 16 uniform.
- the number of reflections in the exposure direction is determined by, for example, previously measuring the intensity distribution of the object light on the incident side of the DMD 18D, and inputting a weighting as shown in FIG. Keep it.
- the difference between the maximum intensity of the beam (normally, the intensity at the center of the beam) and the minimum intensity (normally, the intensity at the four corners of the image) is divided into four equal parts, and each pixel on the DMD18D is divided into four equal parts. Amount of light You just have to decide if it belongs to a range or a shift!
- the object light intensity per data page is reduced as compared with the apodization using optical components, but the output of laser light is increased or the exposure time is increased.
- the output of laser light is increased or the exposure time is increased.
- the exposure time is divided by the reflection type spatial light modulator, and the number of exposures of the incident object light is controlled for each pixel in accordance with the data page to be recorded.
- a holographic recording medium capable of performing stepwise gradation exposure.
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/584,410 US7796312B2 (en) | 2004-01-06 | 2004-12-21 | Holographic recording method and holographic recording apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004000801A JP4369762B2 (ja) | 2004-01-06 | 2004-01-06 | ホログラフィック記録方法及びホログラフィック記録装置 |
JP2004-000801 | 2004-01-06 |
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WO2005066877A1 true WO2005066877A1 (ja) | 2005-07-21 |
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PCT/JP2004/019072 WO2005066877A1 (ja) | 2004-01-06 | 2004-12-21 | ホログラフィック記録方法及びホログラフィック記録装置 |
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US (1) | US7796312B2 (ja) |
JP (1) | JP4369762B2 (ja) |
WO (1) | WO2005066877A1 (ja) |
Cited By (2)
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CN102928990A (zh) * | 2012-11-21 | 2013-02-13 | 中国科学院上海光学精密机械研究所 | 改变光束偏振方向二维分布的装置 |
CN105573095A (zh) * | 2015-12-24 | 2016-05-11 | 联想(北京)有限公司 | 电子设备及其显示处理方法 |
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JP2006259519A (ja) * | 2005-03-18 | 2006-09-28 | Fujitsu Ltd | ホログラム記録装置 |
JP4617487B2 (ja) * | 2005-03-18 | 2011-01-26 | 富士通株式会社 | ホログラム記録装置 |
CA2629649A1 (en) * | 2005-11-15 | 2007-05-24 | California Institute Of Technology | High density, high bandwidth multilevel holographic memory |
EP1933310A1 (en) * | 2006-12-13 | 2008-06-18 | Deutsche Thomson OHG | Pre-exposure and curing of photo-sensitive material for optical data storage |
JP4398990B2 (ja) * | 2007-03-28 | 2010-01-13 | 株式会社東芝 | 駆動機構 |
CN104656404B (zh) * | 2015-03-02 | 2017-08-08 | 京东方科技集团股份有限公司 | 全息记录装置和全息记录方法 |
CN110864817B (zh) * | 2019-11-22 | 2021-02-12 | 山东大学 | 基于单像素探测器的非干涉定量相位成像方法 |
EP3886091A1 (en) * | 2020-03-26 | 2021-09-29 | Microsoft Technology Licensing, LLC | Holographic storage |
EP3886093A1 (en) | 2020-03-26 | 2021-09-29 | Microsoft Technology Licensing, LLC | Optical data transfer |
EP3886092A1 (en) | 2020-03-26 | 2021-09-29 | Microsoft Technology Licensing, LLC | Holographic storage |
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- 2004-01-06 JP JP2004000801A patent/JP4369762B2/ja not_active Expired - Fee Related
- 2004-12-21 US US10/584,410 patent/US7796312B2/en not_active Expired - Fee Related
- 2004-12-21 WO PCT/JP2004/019072 patent/WO2005066877A1/ja active Application Filing
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CN102928990A (zh) * | 2012-11-21 | 2013-02-13 | 中国科学院上海光学精密机械研究所 | 改变光束偏振方向二维分布的装置 |
CN105573095A (zh) * | 2015-12-24 | 2016-05-11 | 联想(北京)有限公司 | 电子设备及其显示处理方法 |
Also Published As
Publication number | Publication date |
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US7796312B2 (en) | 2010-09-14 |
JP4369762B2 (ja) | 2009-11-25 |
JP2005195767A (ja) | 2005-07-21 |
US20070153345A1 (en) | 2007-07-05 |
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