Aerial three-dimensional imaging device and method

Abstract

The present application provides an aerial three-dimensional imaging device and method, which relates to the field of medium-free aerial imaging applications. First, a volumetric three-dimensional display system diffusely reflects a high-speed projector to form a spatial luminous voxel (i.e., three-dimensional spatial imaging, but implemented on the spatial luminous voxel). Then, the spatial luminous voxel is imaged in the air through an optical waveguide plate to form a three-dimensional naked-eye imaging. In the final imaging, the naked-eye three-dimensional effect can be achieved without the need for a medium carrier.

Description

Technical Field

[0001] The present invention relates to the application field of medium-free aerial imaging, and in particular provides a device and method for realizing aerial three-dimensional imaging. Background Art

[0002] The persistence of vision effect, also known as the afterglow effect, was first proposed by Peter Mark Rogert, a professor at the University of London, in his research report "The Persistence of Vision of Moving Objects" in 1824. When the human eye observes a scene, it takes a short period of time for the light signal to be transmitted to the brain nerves. After the light effect ends, the visual image does not disappear immediately. This residual vision is called "afterimage", and this visual phenomenon is called "persistence of vision", and this residual vision usually stays in the human brain for 0.1-0.4 seconds.

[0003] With the help of the visual aftereffect, many shops, scenic spots and other places have designed or purchased a device. The general structure of this device is similar to that of U.S. Patent US20230018982A1. By rotating the LED light strip at high speed, a disc-shaped image can be formed on its light-emitting side. The image can display time, text and even video to attract customers and tourists. At this stage, this technology is widely used in exhibitions, aviation, cultural tourism and other fields.

[0004] As we all know, two-dimensional display only shows "length and width" in visual effect, while three-dimensional display has the additional category of "depth" in visual effect, that is, the image has "thickness" so that the audience can see the complete 3D image with naked eyes. In fact, 3D imaging has already been practically applied in existing technologies. At present, 3D imaging technologies based on binocular parallax principle include glasses / helmet type and grating type. Glasses / helmet type has the disadvantages of single user, low display resolution, and heavy auxiliary accessories. Slit grating type can only see the corresponding parallax graphics through the light-transmitting part of the slit grating, thereby generating 3D vision. The cylindrical lens grating type uses the refraction of light by the cylindrical lens array to provide the left and right parallax images to the left and right eyes, which are fused by the brain to form stereoscopic vision. For static 3D imaging, 3D imaging can also be formed by projecting the image onto a transparent multi-layer screen at high speed through high-speed DLP.

[0005] These three-dimensional imaging systems currently all have the same pain point - they require physical media for imaging. Even AR imaging requires glasses as an imaging medium for viewing. 3D movies also require people to wear glasses to view the images formed on the screen to form 3D images. The formation of these images depends on physical media to see 3D images. As an emerging field, naked-eye 3D urgently needs a device that can allow users to completely break away from physical media and use naked eyes to view 3D images.

[0006] How to provide a naked-eye 3D imaging device and method is the solution to be provided in the present invention in combination with the medium-free holographic technology, and for this reason, the present invention comes into being. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, one or more embodiments are used to solve the problem that the existing 3D imaging technology cannot be completely separated from the physical medium. The present invention first proposes a device for realizing aerial three-dimensional imaging, which is characterized by comprising:

[0008] High-speed projector;

[0009] A volumetric three-dimensional display system, wherein the volumetric three-dimensional display system forms a diffuse reflection three-dimensional imaging space facing the high-speed projector and is activated by the projection image source of the high-speed projector to form a spatial luminous voxel;

[0010] An optical waveguide plate, wherein the optical waveguide plate and the space light-emitting voxel are arranged at an imaging angle, and three-dimensionally images the space light-emitting voxel in the air;

[0011] A control system is at least connected to the high-speed projector and the volumetric three-dimensional display system.

[0012] Preferably, the volumetric three-dimensional display system includes a spiral diffuse reflection screen, which is arranged facing the high-speed projector and forms a three-dimensional image through diffuse reflection.

[0013] Preferably, the device further includes a housing having a cavity therein and an opening formed on the top; the high-speed projector, the volumetric three-dimensional display system and the control system are arranged in the housing, the optical waveguide plate is installed in the opening, and the spatial light-emitting voxels are imaged in the air above the housing by the optical waveguide plate.

[0014] Preferably, it also includes a light-transmitting protection component, which includes a fixed installation frame and a light-transmitting protection cover plate; the fixed installation frame is installed in the opening, and the light-transmitting protection cover plate is installed in the fixed installation frame and is located above the optical waveguide plate.

[0015] The beneficial effects of the above technical solution can come from one or a combination of the following:

[0016] First, a volumetric three-dimensional display system is diffusely projected by a high-speed projector to form a spatial luminous voxel (that is, three-dimensional spatial imaging, but implemented on the spatial luminous voxel). Then, the spatial luminous voxel is imaged in the air through an optical waveguide plate to form a three-dimensional naked-eye imaging. In the final imaging, the naked-eye three-dimensional effect can be achieved without the need for a medium carrier.

[0017] The volumetric three-dimensional display system is a spiral diffuse reflection screen. By controlling the rotation speed of the spiral and coordinating with a high-speed projector for projection, high-speed projection imaging is achieved to form a three-dimensional diffuse reflection luminous body, which is then imaged in the air through an optical waveguide plate to achieve naked-eye 3D imaging.

[0018] The whole device is hidden inside the device casing, truly realizing naked eye vision, and can be applied to medical, health, entertainment and other fields.

[0019] The present invention also provides a method for realizing aerial three-dimensional imaging, which is characterized by comprising:

[0020] Controlling a high-speed projector, wherein the high-speed projector projects an image source image at a high speed;

[0021] Controlling an integrated three-dimensional display system, wherein the volumetric three-dimensional display system is controlled to form a diffuse reflection three-dimensional imaging space facing the high-speed projector, and is activated by the projection image source of the high-speed projector to form a spatial luminous voxel;

[0022] An optical waveguide plate is arranged, and the optical waveguide plate and the space light-emitting voxel are set at an imaging angle, and the optical waveguide plate forms a three-dimensional image of the space light-emitting voxel in the air.

[0023] Preferably, the volumetric three-dimensional display system includes a spiral diffuse reflection screen, which is arranged facing the high-speed projector and forms a three-dimensional image through diffuse reflection.

[0024] Preferably, the maximum projection area of ​​the high-speed projector is the maximum circular area of ​​the main viewing angle of the orthographic projection of the spiral diffuse reflection screen.

[0025] Preferably, the spiral diffuse reflection screen is made of a semi-transparent diffuse reflection material.

[0026] The beneficial effects of the above technical solution can come from one or a combination of the following:

[0027] First, a volumetric three-dimensional display system is diffusely projected by a high-speed projector to form a spatial luminous voxel (that is, three-dimensional spatial imaging, but implemented on the spatial luminous voxel). Then, the spatial luminous voxel is imaged in the air through an optical waveguide plate to form a three-dimensional naked-eye imaging. In the final imaging, the naked-eye three-dimensional effect can be achieved without the need for a medium carrier.

[0028] The volumetric three-dimensional display system is a spiral diffuse reflection screen. By controlling the rotation speed of the spiral and coordinating with a high-speed projector for projection, high-speed projection imaging is achieved to form a three-dimensional diffuse reflection luminous body, which is then imaged in the air through an optical waveguide plate to achieve naked-eye 3D imaging.

[0029] The whole device is hidden inside the device casing, truly realizing naked eye vision, and can be applied to medical, health, entertainment and other fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural explosion diagram of the aerial three-dimensional imaging device implemented in the present invention.

[0031] Figure 2 It is an assembly diagram of the aerial three-dimensional imaging device implemented in the present invention.

[0032] Figure 3 It is a schematic diagram of the internal structure of the aerial three-dimensional imaging device implemented in the present invention. DETAILED DESCRIPTION

[0033] The preferred embodiments described below are for example only, and those skilled in the art may think of other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0034] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0035] Free-medium holographic technology is a technology that can reproduce image information in the air without the need for a carrier or medium. Free-medium holographic technology uses an optical micro-mirror structure to replicate the light field and reproduce a 100% three-dimensional real image in three-dimensional space. The optical micro-mirror structure records the intensity, angle, wavelength and other information of each light ray from the real light source in the "object space" that is directed to the imaging unit, and replicates the light ray that is completely mirrored with the recorded light ray in the "image space" on the other side of the array. These replicated light rays are refocused to form a real image that is completely mirrored with the object in the "object space" at a symmetrical position in the "image space". This real image does not rely on any medium and can be directly observed with the naked eye within a specific angle range. This is a necessary prerequisite for the implementation of the present invention.

[0036] Embodiment 1:

[0037] Please refer to Figure 1 to Figure 3This embodiment describes a device for realizing three-dimensional imaging in the air, which includes a high-speed projector 1, a volumetric three-dimensional display system 2, an optical waveguide plate 3, and a control system 5. The volumetric three-dimensional display system 2 forms a diffuse reflection three-dimensional imaging space facing the high-speed projector 1, and is activated by the projection image source of the high-speed projector 1 to form a spatial light-emitting voxel. The optical waveguide plate 3 is arranged at an imaging angle with the spatial light-emitting voxel, and the spatial light-emitting voxel is three-dimensionally imaged in the air. In terms of control, the control system 5 at least controls the connection with the high-speed projector 1 and the volumetric three-dimensional display system 2. In implementation, the volumetric three-dimensional display system 2 first diffusely reflects the projection of the high-speed projector 1 to form a spatial light-emitting voxel (that is, three-dimensional spatial imaging, but implemented on the spatial light-emitting voxel), and then the spatial light-emitting voxel is imaged in the air through the optical waveguide plate 3 to form a three-dimensional naked-eye imaging, and the naked-eye three-dimensional effect can be achieved without the need for a medium carrier in the final imaging.

[0038] The above technical solutions are necessary for realizing the basis of this embodiment, and are described in detail below in conjunction with the accompanying drawings:

[0039] The optical waveguide plate 3 in this embodiment is selected from the microchannel matrix optical waveguide plate of Xianghang (Shanghai) Technology Co., Ltd. This is an existing component so the principle will not be expanded.

[0040] Furthermore, the volumetric three-dimensional display system 2 includes a spiral diffuse reflection screen 21, which is arranged facing the high-speed projector 1 and diffusely reflects to form a three-dimensional image. When the high-speed projector 1 projects onto the rotating spiral diffuse reflection screen 21, the spiral diffuse reflection screen 21 rotates to form a spatial cylinder, which is defined as a spatial luminous voxel.

[0041] In this embodiment, the principle of the high-speed projector 1 is not explained. The high-speed projector projects onto the rotating screen to form a three-dimensional image, which is a three-dimensional display method based on the slice projection principle. The principle is to divide the three-dimensional image to be displayed into three-dimensional spiral slices, and the high-speed projector will project these spiral slices onto the rotating screen in a certain sequence. According to the parameters such as the refresh rate of the determined volumetric three-dimensional image and the rotation speed of the rotating screen, a smooth three-dimensional image is obtained. It belongs to the application of the prior art.

[0042] The control system 5 is a control mainboard, which is connected to the high-speed projector 1 and the volumetric three-dimensional display system 2. Specifically, it controls the rotation of the spiral diffuse reflection screen 21 to cooperate with the high-speed projection imaging of the high-speed projector 1, so that the spiral diffuse reflection screen 21 forms a three-dimensional figure when it rotates. Its rotation speed corresponds to the adaptation of the video frame number of the high-speed projector 1. For example, when a three-dimensional projection is required, the high-speed projector 1 is started, and the spiral diffuse reflection screen 21 is projected. Then, the spiral diffuse reflection screen 21 rotates at a high speed, and the rotation speed shall not be lower than the video frame rate (for example, if the video frame rate is 30fps, the rotation speed shall not be lower than 1800rpm, and if the video frame rate is Xfps, the rotation speed shall not be lower than 60Xrpm. Since the minimum frame rate of the continuous video that the human eye can see is 24fps, the minimum rotation speed shall not be lower than 1440rpm). The projection on the spiral screen will be reflected and presented in the air through the secondary imaging of the optical waveguide plate 3 as a three-dimensional real image, which can be directly observed by the naked eye.

[0043] Furthermore, the device also includes a device housing 6 to achieve structural integration. Specifically, the device housing 6 has a cavity inside and an opening is formed on the top. Among them, the high-speed projector 1, the volumetric three-dimensional display system 2 and the control system 5 are arranged in the device housing 6, the optical waveguide plate 3 is installed in the opening, and the spatial light-emitting voxels are imaged by the optical waveguide plate 3 in the air above the device housing 6. The interior of the device housing 6 is a closed space to form space protection, and components such as built-in heat dissipation components are arranged for functional structure. This is a conventional technology, so no unnecessary explanation is given.

[0044] Furthermore, in order to protect the optical waveguide plate 3, the device further includes a light-transmitting protection component, which includes a fixed mounting frame 41 and a light-transmitting protection cover plate 42. The fixed mounting frame 41 is mounted on the opening of the device housing 6, and the light-transmitting protection cover plate 42 is mounted on the fixed mounting frame 41 and located above the optical waveguide plate 3.

[0045] The beneficial effects of this embodiment are:

[0046] First, the volumetric three-dimensional display system 2 is diffusely reflected by the high-speed projector 1 to form a spatial luminous voxel (that is, three-dimensional spatial imaging, but implemented on the spatial luminous voxel), and then the spatial luminous voxel is imaged in the air through the optical waveguide plate 3 to form a three-dimensional naked-eye imaging. In the final imaging, the naked-eye three-dimensional effect can be achieved without the need for a medium carrier.

[0047] The volumetric three-dimensional display system 2 is a spiral diffuse reflection screen 21, which realizes high-speed projection imaging by controlling the rotation speed of the spiral to cooperate with the high-speed projector 1 for projection, forming a three-dimensional diffuse reflection luminous body, and then images it in the air through the optical waveguide plate 3 to realize naked-eye 3D imaging.

[0048] The whole device is hidden in the device housing 6, truly realizing naked eye vision, and can be applied to medical, health, entertainment and other fields.

[0049] Embodiment 2:

[0050] Please refer to Figure 1 to Figure 3 This embodiment provides a method for realizing aerial three-dimensional imaging, which is applied to the aerial three-dimensional imaging device described in Embodiment 1. The method includes the following steps:

[0051] S1: Control a high-speed projector 1 to allow the high-speed projector 1 to project a source image at high speed.

[0052] Specifically, the high-speed projector 1 is an application of the prior art in this embodiment, and its structural principle is not specifically introduced in this embodiment.

[0053] S2: Control the integrated three-dimensional display system 2, which is controlled to form a diffuse reflection three-dimensional imaging space facing the high-speed projector 1, and is activated by the projection image source of the high-speed projector 1 to form a spatial luminous voxel.

[0054] Specifically, the volumetric three-dimensional display system 2 includes a spiral diffuse reflection screen 21, which is arranged facing the high-speed projector 1 and diffusely reflects to form a three-dimensional image. When the high-speed projector 1 projects onto the rotating spiral diffuse reflection screen 21, the spiral diffuse reflection screen 21 rotates to form a spatial cylinder, which is defined as a spatial luminous voxel.

[0055] S3: Arrange an optical waveguide plate 3, and set the optical waveguide plate 3 and the spatial light-emitting voxel at an imaging angle, so that the optical waveguide plate 3 forms a three-dimensional image of the spatial light-emitting voxel in the air.

[0056] Specifically, the optical waveguide plate 3 in this embodiment is selected from Xianghang (Shanghai) Technology Co., Ltd. The microchannel matrix optical waveguide plate of this type is an existing component and therefore the principle will not be expanded upon.

[0057] The system for controlling the high-speed projector 1 and the volumetric three-dimensional display system 2 is a control system 5, which is a control mainboard, and its control connection is with the high-speed projector 1 and the volumetric three-dimensional display system 2. Specifically, it controls the rotation of the spiral diffuse reflection screen 21 to cooperate with the high-speed projection imaging of the high-speed projector 1, so that the spiral diffuse reflection screen 21 forms a three-dimensional figure when rotating. Its rotation speed corresponds to the adaptation of the video frame number of the high-speed projector 1. For example, when a three-dimensional projection is required, the high-speed projector 1 is started, and the spiral diffuse reflection screen 21 is projected, and then the spiral diffuse reflection screen 21 is rotated at a high speed, and the rotation speed shall not be lower than the video frame rate (for example, if the video frame rate is 30fps, the rotation speed shall not be lower than 1800rpm, and if the video frame rate is Xfps, the rotation speed shall not be lower than 60Xrpm. Since the minimum frame rate of the continuous video that the human eye can see is 24fps, the minimum rotation speed shall not be lower than 1440rpm). The projection on the spiral screen will be reflected and presented as a three-dimensional real image in the air through the secondary imaging of the optical waveguide plate 3, and the real image can be directly observed by the naked eye.

[0058] Furthermore, the method implemented in this embodiment is implemented in the device described in Example 1, and the device also includes a device housing 6 to achieve structural integration. Specifically, the device housing 6 has a cavity inside and an opening is formed on the top. Among them, the high-speed projector 1, the volumetric three-dimensional display system 2 and the control system 5 are arranged in the device housing 6, the optical waveguide plate 3 is installed in the opening, and the spatial light-emitting voxels are imaged by the optical waveguide plate 3 in the air above the device housing 6. The interior of the device housing 6 is a closed space to form space protection, and components such as built-in heat dissipation components are arranged for functional structure. This is a conventional technology, so no unnecessary explanation is given.

[0059] Furthermore, in order to protect the optical waveguide plate 3, the device further includes a light-transmitting protection component, which includes a fixed mounting frame 41 and a light-transmitting protection cover plate 42. The fixed mounting frame 41 is mounted on the opening of the device housing 6, and the light-transmitting protection cover plate 42 is mounted on the fixed mounting frame 41 and located above the optical waveguide plate 3.

[0060] It should be noted that the steps described above are an expression of a complete technical solution, and the content thereof does not necessarily have to be rigidly implemented according to each step, but should be based on the overall solution combined with the implementation expression. The content description of each step does not necessarily constitute a limitation on the scope of protection of the present invention.

[0061] The beneficial effects of the above technical solution can come from one or a combination of the following:

[0062] First, the volumetric three-dimensional display system 2 is diffusely reflected by the high-speed projector 1 to form a spatial luminous voxel (that is, three-dimensional spatial imaging, but implemented on the spatial luminous voxel), and then the spatial luminous voxel is imaged in the air through the optical waveguide plate 3 to form a three-dimensional naked-eye imaging. In the final imaging, the naked-eye three-dimensional effect can be achieved without the need for a medium carrier.

[0063] The volumetric three-dimensional display system 2 is a spiral diffuse reflection screen 21, which realizes high-speed projection imaging by controlling the rotation speed of the spiral to cooperate with the high-speed projector 1 for projection, forming a three-dimensional diffuse reflection luminous body, and then images it in the air through the optical waveguide plate 3 to realize naked-eye 3D imaging.

[0064] The whole device is hidden in the device housing 6, truly realizing naked eye vision, and can be applied to medical, health, entertainment and other fields.

[0065] It should be understood by those skilled in the art that the embodiments of the present invention described above are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. Implement an aerial three-dimensional imaging device, characterized in that: include: High-speed projector; A volumetric three-dimensional display system, wherein the volumetric three-dimensional display system forms a diffuse reflection three-dimensional imaging space facing the high-speed projector and is activated by the projection image source of the high-speed projector to form a spatial luminous voxel; the volumetric three-dimensional display system comprises a spiral diffuse reflection screen, which is arranged facing the high-speed projector and diffusely reflects to form a three-dimensional image, and the spiral diffuse reflection screen and the high-speed projector are arranged in a straight line, and the spiral diffuse reflection screen is made of a semi-transparent diffuse reflection material; An optical waveguide plate, the optical waveguide plate is located above the spiral diffuse reflection screen, the optical waveguide plate and the spatial light-emitting voxel are arranged at an imaging angle, and the spatial light-emitting voxel is three-dimensionally imaged in the air; A control system, at least connected to the high-speed projector and the volumetric three-dimensional display system; It also includes a device shell, which has a cavity inside and an opening on the top; the high-speed projector, the volumetric three-dimensional display system and the control system are arranged in the device shell, the optical waveguide plate is installed in the opening, and the spatial light-emitting voxels are imaged in the air above the device shell by the optical waveguide plate.

2. The device for realizing aerial three-dimensional imaging according to claim 1, characterized in that: It also includes a light-transmitting protection component, which includes a fixed installation frame and a light-transmitting protection cover plate; the fixed installation frame is installed in the opening, and the light-transmitting protection cover plate is installed in the fixed installation frame and is located above the optical waveguide plate.

3. A method for realizing aerial three-dimensional imaging, using the aerial three-dimensional imaging device according to claim 1 or 2, characterized in that: include: Controlling a high-speed projector, wherein the high-speed projector projects an image source image at a high speed; Controlling an integrated three-dimensional display system, wherein the volumetric three-dimensional display system is controlled to form a diffuse reflection three-dimensional imaging space facing the high-speed projector, and is activated by the projection image source of the high-speed projector to form a spatial luminous voxel; An optical waveguide plate is arranged, and the optical waveguide plate and the space light-emitting voxel are set at an imaging angle, and the optical waveguide plate forms a three-dimensional image of the space light-emitting voxel in the air.

4. The method for realizing aerial three-dimensional imaging according to claim 3, characterized in that: The volumetric three-dimensional display system comprises a spiral diffuse reflection screen, which is arranged facing the high-speed projector and diffusely reflects to form a three-dimensional image.

5. The method for realizing aerial three-dimensional imaging according to claim 4, characterized in that: The maximum projection area of ​​the high-speed projector is the maximum circular area of ​​the main viewing angle of the orthographic projection of the spiral diffuse reflection screen.

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