CN110750041A - Light field three-dimensional imaging device and system based on spatial light modulator - Google Patents
Light field three-dimensional imaging device and system based on spatial light modulator Download PDFInfo
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- G—PHYSICS
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- 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
- 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
- G03H1/22—Processes or apparatus for obtaining an optical image from holograms
- G03H1/2202—Reconstruction geometries or arrangements
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- 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
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- 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]
Abstract
The invention provides a light field three-dimensional imaging device and a system based on a spatial light modulator, comprising: the system comprises a light source component, a spatial light modulator, a light field regulating device and a multi-view projection light path module; and the light beams emitted by the light source component sequentially pass through the spatial light modulator and the multi-view projection light path module and then reach the light field regulating and controlling device. The invention utilizes the phase modulation capability of the spatial light modulator to control the projection direction of emergent light of the spatial light modulator, and can provide projection images with a plurality of visual angles through one spatial light modulator, thereby greatly reducing the number of required projectors, reducing the volume of an optical system and greatly reducing the system cost.
Description
Technical Field
The invention relates to the technical field of three-dimensional imaging, in particular to a light field three-dimensional imaging device and system based on a spatial light modulator.
Background
The light field three-dimensional display technology is a novel three-dimensional display method. The light field three-dimensional imaging method needs to load corresponding two-dimensional image information from different angles onto a light field regulating device to reconstruct a three-dimensional light field, so that a large number of projection mechanisms are usually needed to form a projection array to provide multi-view projection images, which results in a huge required optical system and a very high cost.
Patent document CN 104935915B (application number: 201510424975.1) discloses an imaging device for three-dimensional imaging, which includes a first lens, a second lens, and an image sensor; the first lens and the second lens are used for taking images of the same scene at the same time so as to acquire a first image and a second image with parallax; the target surface of the image sensor comprises a first photosensitive area and a second photosensitive area, the first photosensitive area and the second photosensitive area are separated from each other, namely the first photosensitive area and the second photosensitive area are two areas which are not overlapped on the target surface of the image sensor, a first image is projected to the first photosensitive area through a first lens, and a second image is projected to the second photosensitive area through a second lens.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a light field three-dimensional imaging device and system based on a spatial light modulator.
The invention provides a light field three-dimensional imaging device based on a spatial light modulator, which comprises:
the system comprises a light source component, a spatial light modulator, a light field regulating device and a multi-view projection light path module;
and the light beams emitted by the light source component sequentially pass through the spatial light modulator and the multi-view projection light path module and then reach the light field regulating and controlling device.
Preferably, the light source assembly comprises: the device comprises a light source, a beam expanding collimation device, a polaroid and a beam splitting prism;
light beams emitted by the light source sequentially pass through the beam expanding and collimating device, the polaroid and the beam splitting prism and then are emitted into the spatial light modulator through the beam splitting prism;
the light field regulating and controlling device is a directional scattering screen, and the planar directional scattering screen comprises any one of the following components: a planar directional scattering screen and a cylindrical directional scattering screen;
the multi-view projection light path module comprises: the first reflector group and the second reflector group;
the light beams emitted by the light source component sequentially pass through the spatial light modulator SLM, the first group of reflectors and the second group of reflectors and then reach the directional scattering screen.
Preferably, the light beam emitted by the light source enters the spatial light modulator, is modulated and then exits from the spatial light modulator, and the light beam exiting from the spatial light modulator is reflected to the second mirror group through the first mirror group and is reflected to the directional diffusion screen through the second mirror group.
Preferably, the first mirror group includes: n reflectors, wherein n is a positive integer greater than 1;
the second mirror group includes: n mirrors;
the n reflectors of the first reflector group are respectively in one-to-one correspondence with the n reflectors of the second reflector group;
the light beam emitted from the spatial light modulator includes: n light beams;
the n light beams emitted from the spatial light modulator are reflected to the n reflectors of the second reflector group through the n reflectors of the first reflector group respectively, and are reflected to the directional scattering screen at uniform angle intervals through the n reflectors of the second reflector group.
Preferably, the device further comprises a control module, and the control module is respectively connected with the light source assembly and the spatial light modulator.
The invention provides a light field three-dimensional imaging system based on a spatial light modulator, which comprises:
a control module: acquiring image information and a user instruction which need to be projected, converting the image information which needs to be projected into a hologram through a hologram algorithm according to the user instruction, outputting the hologram to a spatial light modulator module, and outputting the user instruction to a light source module;
a light source module: according to a received user instruction, driving a light source to emit an initial light beam to a spatial light modulator module;
spatial light modulator module: according to the received hologram, phase modulation is carried out on the incident initial light beam, and a plurality of light beams with different visual angle image information are output;
multi-view projection light path module: projecting a plurality of light beams with different visual angle image information to a directional scattering screen module;
a directional diffuser screen module; : according to the scattering characteristic of the directional scattering screen, the light emitting angle of the modulated light beam with the image information is limited within a preset angle in the horizontal direction, light rays are scattered in the vertical direction, and a plurality of light beams with different view angle image information are subjected to light field splicing in the horizontal direction to obtain a three-dimensional light field.
Preferably, the control module:
a hologram generation module: converting image information to be projected into a hologram through a hologram algorithm, and outputting the hologram to a spatial light modulator module;
external communication interface module: receiving external data and acquiring image information needing to be projected;
a control program interface module: a user instruction is received.
Preferably, the light source module includes:
beam expanding collimation and beam expanding collimation module: expanding the initial light beam emitted by the light source and collimating the initial light beam into parallel light;
a polarizer module: controlling the polarization state of the initial light beam emitted by the light source;
the beam splitting prism module: the light path of the initial light beam emitted by the light source is deflected so that the light beam is vertically incident to the spatial light modulator module.
Preferably, the multi-view projection optical path module includes:
the first reflector group module: reflecting the light beam with the image information to a second reflector module;
a second mirror group module: and reflecting the light beam with the image information to the directional diffusion screen module in a preset direction.
Preferably, the spatial light modulator module: and according to the received hologram, carrying out phase modulation on the incident initial light beam to obtain a plurality of light beams with image information, and projecting the plurality of light beams with the image information to the multi-view projection light path module in a preset direction respectively.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes the phase modulation capability of the spatial light modulator to control the projection direction of emergent light of the spatial light modulator, and can provide projection images with a plurality of visual angles through one spatial light modulator, thereby greatly reducing the number of required projectors, reducing the volume of an optical system and greatly reducing the system cost.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a light field three-dimensional imaging system based on a spatial light modulator provided by the invention.
Fig. 2 is a schematic structural diagram of a light source module provided by the present invention.
Fig. 3 is a schematic structural diagram of a control module of the light field three-dimensional imaging system based on the spatial light modulator provided by the invention.
Fig. 4 is a schematic top view of a multi-view projection optical path provided by the present invention.
Fig. 5 is a schematic front view of a multi-view projection optical path provided by the present invention.
Fig. 6 is an equivalent optical path schematic diagram of a multi-view projection optical path provided by the present invention.
Fig. 7 is a schematic view of the scattering characteristics of the directional diffuser provided by the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a light field three-dimensional imaging device based on a spatial light modulator, which comprises:
the system comprises a light source component, a spatial light modulator, a light field regulating device and a multi-view projection light path module;
and the light beams emitted by the light source component sequentially pass through the spatial light modulator and the multi-view projection light path module and then reach the light field regulating and controlling device.
Specifically, the light source assembly includes: the device comprises a light source, a beam expanding collimation device, a polaroid and a beam splitting prism;
light beams emitted by the light source sequentially pass through the beam expanding and collimating device, the polaroid and the beam splitting prism and then are emitted into the spatial light modulator through the beam splitting prism;
the light field regulating and controlling device is a directional scattering screen, and the planar directional scattering screen comprises any one of the following components: a planar directional scattering screen and a cylindrical directional scattering screen;
the multi-view projection light path module comprises: the first reflector group and the second reflector group;
the light beams emitted by the light source component sequentially pass through the spatial light modulator SLM, the first group of reflectors and the second group of reflectors and then reach the directional scattering screen.
Specifically, the light beam emitted by the light source enters the spatial light modulator, is emitted from the spatial light modulator after being modulated, and is reflected to the second reflector group through the first reflector group and is reflected to the directional diffusion screen through the second reflector group.
Specifically, the first mirror group includes: n reflectors, wherein n is a positive integer greater than 1;
the second mirror group includes: n mirrors;
the n reflectors of the first reflector group are respectively in one-to-one correspondence with the n reflectors of the second reflector group;
the light beam emitted from the spatial light modulator includes: n light beams;
the n light beams emitted from the spatial light modulator are reflected to the n reflectors of the second reflector group through the n reflectors of the first reflector group respectively, and are reflected to the directional scattering screen at uniform angle intervals through the n reflectors of the second reflector group.
The light source module comprises a light source assembly, a spatial light modulator and a control module, wherein the light source assembly is arranged in the light source assembly, and the spatial light modulator is arranged in the light source assembly.
The invention provides a light field three-dimensional imaging system based on a spatial light modulator, which comprises:
a control module: acquiring image information and a user instruction which need to be projected, converting the image information which needs to be projected into a hologram through a hologram algorithm according to the user instruction, outputting the hologram to a spatial light modulator module, and outputting the user instruction to a light source module;
a light source module: according to a received user instruction, driving a light source to emit an initial light beam to a spatial light modulator module;
spatial light modulator module: according to the received hologram, phase modulation is carried out on the incident initial light beam, and a plurality of light beams with different visual angle image information are output;
multi-view projection light path module: projecting a plurality of light beams with different visual angle image information to a directional scattering screen module;
a directional diffuser screen module; : according to the scattering characteristic of the directional scattering screen, the light emitting angle of the modulated light beam with the image information is limited within a preset angle in the horizontal direction, light rays are scattered in the vertical direction, and a plurality of light beams with different view angle image information are subjected to light field splicing in the horizontal direction to obtain a three-dimensional light field.
Specifically, the control module:
a hologram generation module: converting image information to be projected into a hologram through a hologram algorithm, and outputting the hologram to a spatial light modulator module;
external communication interface module: receiving external data and acquiring image information needing to be projected;
a control program interface module: a user instruction is received.
Specifically, the light source module includes:
beam expanding collimation and beam expanding collimation module: expanding the initial light beam emitted by the light source and collimating the initial light beam into parallel light;
a polarizer module: controlling the polarization state of the initial light beam emitted by the light source;
the beam splitting prism module: the light path of the initial light beam emitted by the light source is deflected so that the light beam is vertically incident to the spatial light modulator module.
Specifically, the multi-view projection optical path module includes:
the first reflector group module: reflecting the light beam with the image information to a second reflector module;
a second mirror group module: and reflecting the light beam with the image information to the directional diffusion screen module in a preset direction.
Specifically, the spatial light modulator module: and according to the received hologram, carrying out phase modulation on the incident initial light beam to obtain a plurality of light beams with image information, and projecting the plurality of light beams with the image information to the multi-view projection light path module in a preset direction respectively.
The present invention will be described in more detail below with reference to preferred examples.
Preferred example 1:
as shown in fig. 1, a light field three-dimensional imaging system based on a spatial light modulator includes a light source module, a control module, a Spatial Light Modulator (SLM), a multi-view projection light path module, and a directional scattering screen.
The method comprises the steps that firstly, a control module converts corresponding image information needing to be projected into a hologram form through a hologram algorithm, outputs and loads the image information to a spatial light modulator for display, synchronously controls a light source system to provide a light source to be incident on the spatial light modulator, reproduces corresponding image information, controls the projection direction of emergent light, and projects the image information of corresponding visual angles to a directional scattering screen through a multi-visual angle projection light path, so that a three-dimensional light field is reconstructed and observed by human eyes.
Generally, the light source module mainly performs illumination operation on spatial light modulation, and as shown in fig. 2, mainly includes a light source, a beam expanding collimator, a polarizer, and a beam splitting prism. The light source is a monochromatic laser light source or RGB color laser light source with coherence, and can also be a monochromatic or color LED light source; the beam expanding collimator is used for expanding beams of a light source, collimating the beams into parallel light and enabling the parallel light to be incident on the spatial light modulator, and meanwhile, the beam expanding collimator has a filtering function so as to improve the quality of light beams; the polaroid is used for controlling the polarization state of an incident beam to ensure the working state of the spatial light modulator; the beam splitter prism is used to deflect the optical path so that the beam is incident normally on the reflective spatial light modulator, which may not be required if a transmissive spatial light modulator is used.
The control module mainly completes the calculation and loading of the hologram of the image information and the synchronous control work of the spatial light modulation and the light source. As shown in fig. 3, the control module mainly includes a main control unit, a control program interface, an external communication interface, a storage unit, a hologram generating unit, an SLM driving unit, and a light source driving unit.
The main control unit completes the control work of the whole system; the control program interface mainly provides a human-computer interface;
the external communication interface mainly comprises wired interfaces such as video and data, or wireless interfaces such as wireless, Bluetooth and infrared interfaces for receiving external data;
the hologram generating unit generates a hologram from corresponding image information or data through a hologram algorithm and outputs the hologram to the spatial light modulator driving unit through the main control unit, so that the spatial light modulator is driven to modulate a light beam incident on the spatial light modulator driving unit to output corresponding image information;
the main control unit can also output and display the hologram which is stored in advance by the internal or external storage unit to the spatial light modulator; the main control unit can realize synchronous driving of the spatial light modulation and the light source.
The multi-view projection light path mainly projects image information of corresponding views projected by the spatial light modulator onto the directional scattering screen according to a specific direction, so that a three-dimensional light field is reconstructed. By utilizing the phase modulation capability of the spatial light modulator and loading different digital optical signals such as digital blazed gratings and the like on the spatial light modulator, light beams incident on the spatial light modulator can be emitted along different deflection angles. Importantly, the spatial light modulator can realize multi-angle multiplexing, that is, incident light beams can be emitted out simultaneously along different directions at the same time. The change of the digital blazed grating to the emergent direction of the light beam is as follows:
in the formula (I), the compound is shown in the specification,
ω represents the magnitude of the angular change of the digital blazed grating to the exit direction of the light beam,
λ is the wavelength of the incident light,
p is the pixel size of the spatial light modulator,
t represents the number of pixels of the spatial light modulator occupied by each period.
FIG. 4 is a top view of a multi-view projection optical path, where a spatial light modulator projects 4 views (or more of them) of image information, and each view passes through two corresponding mirrors (e.g., M)11And M21) After reflection, the three-dimensional light field is reconstructed by projecting the three-dimensional light field onto a directional scattering screen at uniform angle intervals.
In order to avoid the occlusion of the mirrors in the projection beam path, the first mirror (M) in the projection beam path at each viewing angle1) All set a certain inclination angle to make the reflected light beam project obliquely upwards to the second surface reflector (M)2) After being reflected by the second surface reflector which is also obliquely arranged, the light beam continues to horizontally propagate and is projected onto the directional diffuser screen, as shown in fig. 5 (a front view of a multi-view projection light path).
Fig. 6 is an equivalent optical path diagram of the multi-view projection optical path. Through multi-view projection light path, through a spatial light modulator, namely adopt a plurality of spatial light modulators to project the image information that corresponds to on the directional scattering screen from different visual angle directions promptly, spatial light modulator is high frame frequency device, through SLM's quick refresh and people's eye's persistence of vision effect, the projected image of each visual angle can be observed by people's eye simultaneously to rebuild out three-dimensional light field, the required projector quantity that significantly reduces, reduce optical system's volume, reduce system cost.
The light field regulating device adopted in the invention is a directional scattering screen, and the scattering characteristic of the directional scattering screen is shown in figure 7. The screen is onThe light is limited in the horizontal direction, and the light-emitting angle is limited to a small angle deltaxInternally, a direct approximation may be considered as direct reflection or transmission, while a large angle scattering of light in the vertical direction may be considered approximately at (- δ)y/2,+δyDiffusion in the range of/2). The small-angle emission in the horizontal direction determines the fineness of the reconstruction of the light field in the horizontal direction, and the large-angle scattering in the vertical direction furthest ensures the range of the image observed by an observer in the vertical direction.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A light field three-dimensional imaging device based on a spatial light modulator is characterized by comprising:
the system comprises a light source component, a spatial light modulator, a light field regulating device and a multi-view projection light path module;
and the light beams emitted by the light source component sequentially pass through the spatial light modulator and the multi-view projection light path module and then reach the light field regulating and controlling device.
2. The spatial light modulator-based light field three-dimensional imaging apparatus according to claim 1, wherein the light source module comprises: the device comprises a light source, a beam expanding collimation device, a polaroid and a beam splitting prism;
light beams emitted by the light source sequentially pass through the beam expanding and collimating device, the polaroid and the beam splitting prism and then are emitted into the spatial light modulator through the beam splitting prism;
the light field regulating and controlling device is a directional scattering screen, and the planar directional scattering screen comprises any one of the following components: a planar directional scattering screen and a cylindrical directional scattering screen;
the multi-view projection light path module comprises: the first reflector group and the second reflector group;
the light beams emitted by the light source component sequentially pass through the spatial light modulator SLM, the first group of reflectors and the second group of reflectors and then reach the directional scattering screen.
3. The device as claimed in claim 2, wherein the light beam emitted from the light source is incident into the spatial light modulator, modulated and then emitted from the spatial light modulator, and the light beam emitted from the spatial light modulator is reflected by the first mirror group to the second mirror group and reflected by the second mirror group to the directional diffusion screen.
4. The spatial light modulator-based light field three-dimensional imaging device according to claim 3, wherein the first set of mirrors comprises: n reflectors, wherein n is a positive integer greater than 1;
the second mirror group includes: n mirrors;
the n reflectors of the first reflector group are respectively in one-to-one correspondence with the n reflectors of the second reflector group;
the light beam emitted from the spatial light modulator includes: n light beams;
the n light beams emitted from the spatial light modulator are reflected to the n reflectors of the second reflector group through the n reflectors of the first reflector group respectively, and are reflected to the directional scattering screen at uniform angle intervals through the n reflectors of the second reflector group.
5. The spatial light modulator-based light field three-dimensional imaging device according to claim 1, further comprising a control module, wherein the control module is respectively connected to the light source module and the spatial light modulator.
6. A light field three-dimensional imaging system based on a spatial light modulator is characterized by comprising:
a control module: acquiring image information and a user instruction which need to be projected, converting the image information which needs to be projected into a hologram through a hologram algorithm according to the user instruction, outputting the hologram to a spatial light modulator module, and outputting the user instruction to a light source module;
a light source module: according to a received user instruction, driving a light source to emit an initial light beam to a spatial light modulator module;
spatial light modulator module: according to the received hologram, phase modulation is carried out on the incident initial light beam, and a plurality of light beams with different visual angle image information are output;
multi-view projection light path module: projecting a plurality of light beams with different visual angle image information to a directional scattering screen module;
a directional diffuser screen module; : according to the scattering characteristic of the directional scattering screen, the light emitting angle of the modulated light beam with the image information is limited within a preset angle in the horizontal direction, light rays are scattered in the vertical direction, and a plurality of light beams with different view angle image information are subjected to light field splicing in the horizontal direction to obtain a three-dimensional light field.
7. The spatial light modulator-based light field three-dimensional imaging system according to claim 6, wherein the control module:
a hologram generation module: converting image information to be projected into a hologram through a hologram algorithm, and outputting the hologram to a spatial light modulator module;
external communication interface module: receiving external data and acquiring image information needing to be projected;
a control program interface module: a user instruction is received.
8. The spatial light modulator-based light field three-dimensional imaging system according to claim 7, wherein the light source module comprises:
beam expanding collimation and beam expanding collimation module: expanding the initial light beam emitted by the light source and collimating the initial light beam into parallel light;
a polarizer module: controlling the polarization state of the initial light beam emitted by the light source;
the beam splitting prism module: the light path of the initial light beam emitted by the light source is deflected so that the light beam is vertically incident to the spatial light modulator module.
9. The spatial light modulator-based light field three-dimensional imaging system according to claim 8, wherein the multi-view projection light path module comprises:
the first reflector group module: reflecting the light beam with the image information to a second reflector module;
a second mirror group module: and reflecting the light beam with the image information to the directional diffusion screen module in a preset direction.
10. The spatial light modulator-based light field three-dimensional imaging system according to claim 9, wherein the spatial light modulator module: and according to the received hologram, carrying out phase modulation on the incident initial light beam to obtain a plurality of light beams with image information, and projecting the plurality of light beams with the image information to the multi-view projection light path module in a preset direction respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589548A (en) * | 2021-07-28 | 2021-11-02 | 深圳臻像科技有限公司 | Planar transmission type 3D light field display system based on projection array |
| WO2024021852A1 (en) * | 2022-07-27 | 2024-02-01 | 华为技术有限公司 | Stereoscopic display apparatus, stereoscopic display system, and vehicle |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589548A (en) * | 2021-07-28 | 2021-11-02 | 深圳臻像科技有限公司 | Planar transmission type 3D light field display system based on projection array |
| WO2024021852A1 (en) * | 2022-07-27 | 2024-02-01 | 华为技术有限公司 | Stereoscopic display apparatus, stereoscopic display system, and vehicle |
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