WO2018045816A1 - 全息显示装置及其显示方法 - Google Patents
全息显示装置及其显示方法 Download PDFInfo
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- WO2018045816A1 WO2018045816A1 PCT/CN2017/092378 CN2017092378W WO2018045816A1 WO 2018045816 A1 WO2018045816 A1 WO 2018045816A1 CN 2017092378 W CN2017092378 W CN 2017092378W WO 2018045816 A1 WO2018045816 A1 WO 2018045816A1
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- display device
- phase
- modulation
- phase control
- holographic display
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 63
- 230000001427 coherent effect Effects 0.000 claims abstract description 42
- 239000004973 liquid crystal related substance Substances 0.000 claims description 17
- 239000000758 substrate Substances 0.000 description 7
- 210000002858 crystal cell Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000003464 asthenopia Diseases 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2286—Particular reconstruction light ; Beam properties
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- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
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- 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
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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- 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
- G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
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- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2294—Addressing the hologram to an active spatial light modulator
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- 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
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H2001/0208—Individual components other than the hologram
- G03H2001/0224—Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/20—Coherence of the light source
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2222/00—Light sources or light beam properties
- G03H2222/50—Geometrical property of the irradiating beam
- G03H2222/53—Collimated beam
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- G—PHYSICS
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- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2223/00—Optical components
- G03H2223/13—Phase mask
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- 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
- G03H2225/22—Electrically addressed SLM [EA-SLM]
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- 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
- G03H2225/30—Modulation
- G03H2225/31—Amplitude only
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- 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
- G03H2225/30—Modulation
- G03H2225/33—Complex modulation
- G03H2225/34—Amplitude and phase coupled modulation
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- 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
- G03H2225/55—Having optical element registered to each pixel
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2240/00—Hologram nature or properties
- G03H2240/10—Physical parameter modulated by the hologram
- G03H2240/13—Amplitude and phase complex modulation
Definitions
- the present invention relates to the field of three-dimensional display technologies, and in particular, to a holographic display device and a display method thereof.
- 3D display is of great significance in today's social life, and holographic display will be the most promising technology for real 3D display.
- Holographic display can provide all the information of object wave, with excellent depth and parallax, can provide human All physiological and psychological implications of 3D information.
- a method of recording and reproducing a wave of matter using light wave interference and diffraction characteristics is called holography. Since the phase and amplitude information of the object image is recorded, the 3D image of the object image can be reproduced.
- the existing holographic display system uses a spatial or optically addressed spatial modulator to simultaneously modulate the phase and amplitude of the light, requiring a spatial modulator with a high refresh rate and a fast response speed, which is difficult to satisfy. Therefore, there are problems such as large crosstalk, low resolution, and easy visual fatigue, which is not conducive to obtaining an optimal three-dimensional viewing effect.
- embodiments of the present invention provide a holographic display device and a display method thereof for at least partially alleviating the problem that a conventional three-dimensional viewing effect is poor when a spatial modulator implements holographic display.
- Embodiments of the present invention provide a holographic display device including: a backlight for providing coherent reference light, an optical switching device for modulating optical wave amplitude information of the coherent reference light, and for modulating the coherent reference light a phase control board of the light wave phase information; wherein the phase control board and the optical switching device are disposed on a light exiting side of the backlight.
- the phase control board is disposed between the backlight and the optical switching device; or the phase control board is disposed on a light exiting side of the optical switching device.
- the phase control board includes a plurality of mutually independent modulation regions; one of the modulation regions is in one-to-one correspondence with one of the optical switching devices, or in the modulation region One of the ones corresponds to a plurality of pixel regions in the optical switching device.
- two adjacent modulation regions modulate the phase modulation angles of the coherent reference beams to be different from each other.
- each of the modulation regions modulates a phase modulation angle of the coherent reference light to be fixed.
- each of the modulation regions modulating a phase modulation angle of the coherent reference light can be varied according to a received amplitude modulation signal.
- the phase control board is a grating phase control board, a light layer thickness phase control board, or a liquid crystal phase control board.
- the optical switching device is a liquid crystal display device, an electrochromic device, or a photochromic device.
- the coherent reference light provided by the backlight is coherent collimated light.
- an embodiment of the present invention provides a display method of the above holographic display device, including:
- the backlight provides coherent reference light
- the phase control board modulates light wave phase information of the coherent reference light
- the optical switching device modulates light wave amplitude information of the coherent reference light according to the received modulation signal.
- FIG. 1 is a schematic structural diagram of a holographic display device according to an embodiment of the present invention.
- FIG. 2 is a second schematic structural diagram of a holographic display device according to an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of a holographic display device according to an embodiment of the present invention.
- each modulation region of a phase control plate corresponds to a plurality of pixel regions, in accordance with an embodiment of the present invention
- FIG. 5 shows a schematic structure of a holographic display device in which each modulation region of a phase control plate corresponds to one pixel region, in accordance with an embodiment of the present invention
- FIG. 6 shows an example of a phase control panel of a holographic display device in accordance with an embodiment of the present invention
- FIG. 7 illustrates another example of a phase control panel of a holographic display device according to an embodiment of the present invention.
- FIG. 8 illustrates still another example of a phase control panel of a holographic display device according to an embodiment of the present invention
- FIG. 9 is a flow chart showing a display method of a holographic display device according to an embodiment of the present invention.
- an embodiment of the present invention provides a holographic display device including: a backlight for providing coherent reference light, and an optical switching device for modulating light wave amplitude information of the coherent reference light, And a phase control board for modulating optical wave phase information of the coherent reference light; wherein the phase control board and the optical switching device are disposed on a light exiting side of the backlight.
- An embodiment of the present invention provides a holographic display device, as shown in FIGS. 1 and 2, comprising: a backlight 100 for providing coherent reference light, and an optical switching device 200 for modulating light wave amplitude information of the coherent reference light, And a phase control board 300 for modulating optical wave phase information of the coherent reference light; wherein the phase control board 300 and the optical switching device 200 are disposed on the light outgoing side of the backlight 100.
- the phase modulation and the amplitude modulation are separately provided, the optical wave phase information and the optical wave amplitude information are independently controlled, and the optical switching device 200 is used to modulate the optical wave amplitude information, and the phase is utilized.
- the control board 300 modulates the phase information of the light wave, which is advantageous for improving the control ability of the modulation object and realizing high quality holographic display.
- the phase control board 300 can be used to modulate the optical wave phase information, and the three-dimensional display of the naked eye with multiple viewing angles can be realized.
- the phase control board 300 and the optical switching device 200 are both disposed on the light emitting side of the backlight 100, specifically, the phase control board 300 can be as shown in FIG. As shown in FIG. 1 , the phase control board 300 is disposed on the light exiting side of the optical switching device 200 , that is, the optical switching device 200 is disposed on the backlight 100 and the phase control. There is no limitation between the plates 300.
- the backlight 100 for providing coherent reference light may be an OLED backlight, may be an LED backlight, or may be a dynamic backlight. , not limited here.
- the coherent reference light provided by the backlight 100 is preferably coherent collimated light, that is, the backlight 100 is preferably Straight backlight.
- the optical switching device 200 for modulating the optical wave amplitude information of the coherent reference light may be implemented in various manners, for example, a liquid crystal display device or an electrochromic layer may be used.
- a device or a photochromic device may also be a device that modulates light wave amplitude information based on a received modulated signal using a microelectromechanical system (MEMS) device or the like.
- MEMS microelectromechanical system
- the optical switching device 200 when the optical switching device 200 is an electrochromic device, as shown in FIG. 3, the optical switching device 200 specifically includes: an upper substrate 210 and an opposite substrate a lower substrate 220, and an electrochromic material layer 230 disposed between the upper substrate 210 and the lower substrate 220, and further, may further include an electrolyte layer 240; and, the electrolyte layer 240 may be electro-electric as shown in FIG. Color changing material layer
- the side of the lower substrate 220 may be located on the side of the lower substrate 220, which is not limited thereto.
- the optical switching device 200 selects other devices such as a liquid crystal display device or a photochromic device
- the structure of the electrochromic device is similar, and details are not described herein.
- the phase control board 300 in order to realize the modulation of the optical wave phase information, in the above holographic display device provided by the embodiment of the present invention, the phase control board 300 generally includes a plurality of mutually independent modulation regions; and, a modulation region and the optical switch One pixel area of the device 200 corresponds to one another; or a modulation area may correspond to a plurality of pixel areas in the optical switching device 200, which is not limited herein.
- each modulation region of the phase control board 300 corresponds to a plurality of pixel regions in the optical switching device 200, respectively.
- the first modulation area 310 corresponds to three pixel areas 410, 420, 430
- the second modulation area 320 corresponds to two pixel areas 440, 450.
- each modulation area of the phase control board 300 corresponds to one pixel area in the optical switching device 200, respectively.
- the first modulation area 310 corresponds to one pixel area 430
- the second modulation area 320 corresponds to one pixel area 440.
- the modulation region corresponds to one or more pixel regions, meaning that the modulation region is arranged to phase modulate the outgoing light of the one or more pixel regions.
- one modulation region can be aligned with one or more pixel regions.
- the phase modulation angles of the modulated light rays of the adjacent two modulation regions in the phase control panel 300 are generally different from each other, and the adjustment capability of the phase modulation angle is generally controlled at 0. -2 ⁇ , that is, the phase adjustment angle range is selected within 0-2 ⁇ .
- the holographic display in order to realize the display of the dynamic holographic image, in the holographic display device provided by the embodiment of the present invention, can be realized by the following three methods: First, the modulated optical wave amplitude information is dynamically changed. The phase modulation angle of the phase information of the modulated light wave is relatively fixed. Secondly, the amplitude information of the modulated light wave is dynamically changed, and the phase modulation angle of the phase information of the modulated light wave is also dynamically changed according to the change of the viewing angle. Third, the amplitude of the modulated light wave is modulated. The information is relatively fixed, and the dynamic holographic display is realized by modulating the phase modulation angle of the phase information of the light wave.
- the phase modulation angle of the modulated light of each modulation region in the phase control panel 300 may be fixed, or may be based on the received control signal (for example, an amplitude modulated signal). ) and dynamically change.
- the implementation manner of the specific phase control board 300 can be selected according to whether the phase modulation angle is dynamically adjusted according to whether each modulation region in the phase control board 300 is required, for example, in fixed phase control.
- the phase control panel 300 can select a grating phase control panel, a light layer thickness phase control panel, or a liquid crystal phase control panel.
- the phase control panel 300 can select the liquid crystal phase control panel.
- the grating phase control board refers to a nano-grating with different grating periods in each modulation area of the phase control board 300, so as to realize different degrees of phase angle modulation on the optical wave phase information of the passing light.
- the first nano-grating 330 and the second nano-grating 340 having different grating periods are respectively disposed in the first modulation area 310 and the second modulation area 320, which can be realized. Different degrees of phase angle modulation are performed on the optical wave phase information of the light passing through the first modulation area 310 and the second modulation area 320.
- the optical layer thickness phase control plate refers to a film stack having different thicknesses in each modulation region of the phase control plate 300 to achieve different degrees of phase angle modulation for the light wave phase information of the passing light.
- the film thicknesses in the first modulation area 310 and the second modulation area 320 are different, which can also be achieved for passing the first modulation area 310 and the second modulation area.
- the light wave phase information of the light of 320 performs different degrees of phase angle modulation.
- the liquid crystal phase control board refers to an independent controllable liquid crystal cell in each modulation area of the phase control board 300. By controlling the rotation angle of the liquid crystal molecules in the liquid crystal cell, different phase angles are realized for the light wave phase information of the passing light.
- a liquid crystal cell 350 is disposed in a modulation area such as the first modulation area 310 and the second modulation area 320, by controlling the rotation angle of liquid crystal molecules in the liquid crystal cell.
- the phase information of the light wave passing through the light of each modulation region can be subjected to different degrees of phase angle modulation.
- the optical switching device 200 is not shown. This is merely exemplary.
- an embodiment of the present invention further provides a display method of a holographic display device. Since the principle of solving the problem is similar to the foregoing holographic display device, the implementation of the display method can be referred to the holographic display device. Implementation, repetition will not be repeated.
- a display method of a holographic display device provided by an embodiment of the present invention, as shown in FIG. 9, includes the following steps:
- the backlight provides coherent reference light
- the phase control board modulates light wave phase information of the coherent reference light
- the optical switching device modulates the optical wave amplitude information of the coherent reference light according to the received modulation signal to implement dynamic holographic display.
- the signal source may perform separation of the amplitude information and the phase information according to the holographic image information to be displayed, and then load the modulation information into the modulation signal and send it to the optical switching device for regulation, and may also be based on the phase information.
- the phase control board performs regulation, or the phase control board of the fixed modulation is used to modulate the phase information of the light wave; the amplitude information of the light wave is modulated by the optical switching device, and the phase information of the light wave is modulated by the phase control board, so that the holographic image can be reproduced.
- the holographic display device and the display method thereof provided by the embodiments of the present invention include: a backlight for providing coherent reference light, an optical switching device for modulating optical wave amplitude information of the coherent reference light, and a modulation reference light for modulating the coherent reference light a phase control board for light wave phase information; wherein the phase control board and the optical switching device are disposed in the backlight The light side. Since the phase modulation and the amplitude modulation are separately set, the optical wave phase information and the optical wave amplitude information are independently controlled, the optical wave amplitude information is modulated by the optical switching device, and the phase control board is used to modulate the optical wave phase information, which is advantageous for improving the modulation target. Controlling ability to achieve high quality holographic display. Moreover, the phase control board can be used to modulate the optical wave phase information, and the three-dimensional display of the naked eye with multiple viewing angles can be realized.
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Abstract
Description
Claims (10)
- 一种全息显示装置,包括:用于提供相干参考光的背光源,用于调制所述相干参考光的光波振幅信息的光开关器件,以及用于调制所述相干参考光的光波相位信息的相位控制板;其中,所述相位控制板和所述光开关器件设置于所述背光源的出光侧。
- 如权利要求1所述的全息显示装置,其中,所述相位控制板设置于所述背光源与所述光开关器件之间;或,所述相位控制板设置于所述光开关器件的出光侧。
- 如权利要求1所述的全息显示装置,其中,所述相位控制板包括多个相互独立的调制区域;所述调制区域中的一个与所述光开关器件中的一个像素区域一一对应,或,所述调制区域中的一个与所述光开关器件中的多个像素区域对应。
- 如权利要求3所述的全息显示装置,其中,相邻的两个所述调制区域调制所述相干参考光的相位调制角度互不相同。
- 如权利要求4所述的全息显示装置,其中,各所述调制区域调制所述相干参考光的相位调制角度是固定的。
- 如权利要求4所述的全息显示装置,其中,各所述调制区域调制所述相干参考光的相位调制角度能够根据接收的振幅调制信号变化。
- 如权利要求4所述的全息显示装置,其中,所述相位控制板包括光栅相位控制板、光层厚度相位控制板、或液晶相位控制板。
- 如权利要求1所述的全息显示装置,其中,所述光开关器件包括液晶显示器件,电致变色器件,或光致变色器件。
- 如权利要求1-8任一项所述的全息显示装置,其中,所述背光源提供的相干参考光为相干准直光。
- 一种如权利要求1-9任一项所述的全息显示装置的显示方法,所述方法包括:背光源提供相干参考光;相位控制板调制所述相干参考光的光波相位信息;光开关器件根据接收到的调制信号调制所述相干参考光的光波振幅信息。
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US15/744,756 US20180314207A1 (en) | 2016-09-08 | 2017-07-10 | Holographic display apparatus and display method for the same |
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CN201610811510.6A CN106154799A (zh) | 2016-09-08 | 2016-09-08 | 一种全息显示装置及其显示方法 |
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Cited By (1)
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GB2576552A (en) * | 2018-08-23 | 2020-02-26 | Dualitas Ltd | Light modulator |
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CN106154799A (zh) * | 2016-09-08 | 2016-11-23 | 京东方科技集团股份有限公司 | 一种全息显示装置及其显示方法 |
CN106154798A (zh) * | 2016-09-08 | 2016-11-23 | 京东方科技集团股份有限公司 | 一种全息显示装置及其显示方法 |
CN106227017B (zh) * | 2016-09-09 | 2018-12-25 | 京东方科技集团股份有限公司 | 一种反射式全息显示装置及其显示方法 |
CN107505824B (zh) * | 2017-08-30 | 2020-12-01 | 京东方科技集团股份有限公司 | 一种光学调制方法及装置、一种全息显示设备 |
CN109254425A (zh) * | 2018-09-12 | 2019-01-22 | 北京理工大学 | 一种复振幅空间光调制器及复振幅空间光调制方法 |
CN109831661A (zh) * | 2019-01-11 | 2019-05-31 | 东南大学 | 一种空间可编程的复合立体显示系统 |
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CN206057815U (zh) * | 2016-09-09 | 2017-03-29 | 京东方科技集团股份有限公司 | 全息显示装置 |
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