CN113391460B - Suspended three-dimensional display equipment based on concentric sphere suspension device array - Google Patents
Suspended three-dimensional display equipment based on concentric sphere suspension device array Download PDFInfo
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- CN113391460B CN113391460B CN202110470424.4A CN202110470424A CN113391460B CN 113391460 B CN113391460 B CN 113391460B CN 202110470424 A CN202110470424 A CN 202110470424A CN 113391460 B CN113391460 B CN 113391460B
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
- G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels by projecting aerial or floating images
Abstract
The invention provides a suspended three-dimensional display device based on a concentric sphere suspension device array, which comprises: a three-dimensional display source, a spectroscope and a concentric sphere suspension device array; the concentric sphere suspension device array is vertical to the three-dimensional display source; the included angle between the spectroscope and the three-dimensional display source is 30-60 degrees; the concentric sphere suspension device array is an array structure formed by concentric sphere suspension devices, and each concentric sphere suspension device comprises a refraction surface first surface, a refraction surface second surface, an absorption surface third surface, a refraction surface fourth surface and a reflection surface fifth surface; the side close to the spectroscope is a first surface; a second surface facing away from the beam splitter and adjacent to the first surface; the third surface is positioned between the second surface and the fourth surface; facing away from the beam splitter and adjacent to the third surface is a fourth surface; facing away from the beam splitter and adjacent to the fourth surface is a fifth surface. The invention improves the definition of the suspended three-dimensional image.
Description
Technical Field
The invention relates to the technical field of image display, in particular to a suspended three-dimensional display device based on a concentric sphere suspension device array.
Background
The medium-free air suspension display mode is used as a novel display mode, and more possibilities are brought for creative application in various fields such as living entertainment, industrial production, scientific research and the like. The medium-free aerial three-dimensional suspension display can suspend the three-dimensional image in the air, and provides a viewing experience for observing a real object for an observer. In exhibition and display, the three-dimensional suspension display can replace the traditional solid advertising board, and promote product popularization and commercial propaganda. In the industrial production field, the three-dimensional suspension display can enable a producer to carry out various production operations more conveniently. Particularly, under the current 5G commercial large environment, the three-dimensional suspension display can bring more valuable applications to emerging fields such as cloud ecology, Internet of things, Internet of vehicles and telemedicine. Therefore, it is important to realize a levitation apparatus capable of levitating a three-dimensional image with a large viewing angle, high definition, and high contrast.
At present, the most adopted scheme of the conventional levitation system capable of realizing a large viewing angle is to form a levitated image by using a display source, a beam splitter obliquely placed at 45 °, and an opposing reflection element. However, since the retroreflective film is not a professional optical imaging device, the problem of serious image blurring of a suspended image formed by the retroreflective film is easily caused, and thus, the existing suspended display system still has the problem of poor definition. Fig. 1 is a schematic diagram illustrating the reflection effect of light provided by the prior art, as shown in fig. 1, when light is incident into an array structure (a small sphere structure, a prism structure or other structures) constituting a retroreflective film, there is a serious aberration, the convergence point of the light is not an ideal light spot but a light spot, and the larger the light spot size is, the more blurred the image is, thereby causing a serious image blurring problem of a suspended image formed by the retroreflective film.
Disclosure of Invention
The invention provides a suspended three-dimensional display device based on a concentric sphere suspended device array, which is used for solving the problem of image blurring of a suspended image in the prior art.
The invention provides a suspended three-dimensional display device based on a concentric sphere suspension device array, which comprises: a three-dimensional display source, a spectroscope and a concentric sphere suspension device array;
wherein the array of concentric sphere suspension devices is perpendicular to the three-dimensional display source; the included angle between the spectroscope and the three-dimensional display source is 30-60 degrees; the concentric sphere suspension device array and the formed suspension three-dimensional image are respectively positioned on two sides of the spectroscope;
the concentric sphere suspension device array is an array structure consisting of concentric sphere suspension devices, and each concentric sphere suspension device comprises a first surface, a second surface, a third surface, a fourth surface and a fifth surface; the first surface is close to one side of the spectroscope and is a refractive surface; facing away from the beam splitter and proximate to the first surface is the second surface, which is a refractive surface; the third surface is located between the second surface and the fourth surface, the third surface being an absorbing surface; facing away from the beam splitter and proximate to the third surface is the fourth surface, which is a refractive surface; the fifth surface is close to the fourth surface and faces away from the beam splitter, and the fifth surface is a reflecting surface.
According to the suspended three-dimensional display equipment based on the concentric sphere suspension device array, the concentric sphere suspension device is composed of two concentric spheres with different radiuses; the duty ratio of the concentric sphere suspension device is within the interval range of (0.1, 0.8); the duty ratio is the ratio of the radius of the smaller concentric sphere to the radius of the larger concentric sphere in the concentric sphere suspension device.
According to the suspended three-dimensional display equipment based on the concentric sphere suspension device array, the radius of the concentric sphere is within the interval range of (0mm, 10 mm); the concentric sphere suspension device is formed by filling materials with different refractive indexes.
According to the suspended three-dimensional display equipment based on the concentric sphere suspended device array, the spectroscope is an optical spectroscope;
the sum of the distance from the central point of the spectroscope to the three-dimensional display source and the distance from the central point of the spectroscope to the concentric sphere suspension device array is larger than 50 mm.
According to the suspended three-dimensional display equipment based on the concentric sphere suspended device array, the transmissivity range of the optical spectroscope is as follows: 10% -70%, the reflectivity range of the optical spectroscope is as follows: 30 to 90 percent.
According to the suspended three-dimensional display equipment based on the concentric sphere suspended device array, the spectroscope is a polarizing spectroscope;
the suspension three-dimensional display equipment further comprises a quarter-wavelength phase modulation device, or further comprises a quarter-wavelength phase modulation device and a linear polarizer;
the linear polarizer is positioned between the polarizing beam splitter and the three-dimensional display source and is parallel to the three-dimensional display source; the quarter-wave phase modulation device is positioned between the polarizing beam splitter and the concentric sphere suspension device array and is parallel to the concentric sphere suspension device array.
According to the suspended three-dimensional display equipment based on the concentric sphere suspension device array, the sum of the distance from the central point of the polarizing beam splitter to the linear polarizer, the distance from the central point of the polarizing beam splitter to the quarter-wavelength phase modulation device, the distance from the linear polarizer to the three-dimensional display source and the distance from the quarter-wavelength phase modulation device to the concentric sphere suspension device array is larger than 50 mm.
According to the suspended three-dimensional display equipment based on the concentric sphere suspension device array, the included angle between the linearly polarized light vibration direction incident to the quarter-wavelength phase modulation device and the optical axis direction of the quarter-wavelength phase modulation device is +/-45 degrees or +/-135 degrees.
According to the suspended three-dimensional display equipment based on the concentric sphere suspension device array, incident light is reflected by the concentric sphere suspension device array, wherein the concentric sphere suspension device can enable small-angle incident light entering the middle part of the first surface to pass through the second surface, the fourth surface and the fifth surface and to be emergent from the first surface again to participate in forming a large-view suspended three-dimensional image; and the large-angle incident light rays incident to the edge part of the first surface are absorbed and cannot be emitted, so that the definition of the finally formed suspension three-dimensional image is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the effect of light reflection provided by the prior art;
FIG. 2 is a schematic structural diagram of a floating three-dimensional display device according to the present invention;
FIG. 3 is a schematic diagram of light reflected from a concentric sphere suspension device according to the present invention;
FIG. 4 is a schematic structural diagram of a concentric sphere suspension device provided by the present invention;
FIG. 5 is a schematic diagram of a polarizing beamsplitter beam splitting provided by the present invention;
FIG. 6 is a second schematic structural diagram of a floating three-dimensional display device according to the present invention;
FIG. 7 is a third schematic structural diagram of a floating three-dimensional display device according to the present invention;
reference numerals:
a1: a three-dimensional display source; a2: a beam splitter; a3: an array of concentric sphere suspension devices;
a4: suspended three-dimensional map a 5: the eyes of an observer; noodle 1: a first surface; an image;
face 2: a second surface; face 3: a third surface; face 4: a fourth surface; face 5: a fifth surface; r1: a smaller concentric sphere radius; r2: a larger concentric sphere radius;
n1: smaller concentric sphere left N2: larger concentric sphere left half N3: refractive index of the smaller concentric sphere right hemisphere; the refractive index of the sphere; a refractive index;
n4: larger concentric sphere right B3: a linear polarizer; b4: quarter-wave phase hemispherical refractive index; a modulation device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 2 is a schematic structural diagram of a floating three-dimensional display device according to an embodiment of the present invention, and as shown in fig. 2, the device includes: a three-dimensional display source A1, a spectroscope A2 and a concentric sphere suspension device array A3;
wherein the concentric sphere suspension device array A3 is perpendicular to the three-dimensional display source A1; the included angle between the spectroscope and the three-dimensional display source is 30-60 degrees; the concentric sphere suspension device array and the formed suspension three-dimensional image are respectively positioned at two sides of the spectroscope;
the concentric sphere suspension device array A3 is an array structure formed by concentric sphere suspension devices, and each concentric sphere suspension device comprises a first surface, a second surface, a third surface, a fourth surface and a fifth surface; the side close to the spectroscope A2 is a first surface which is a refractive surface; facing away from beam splitter a2 and near the first surface is a second surface, which is a refractive surface; the third surface is located between the second surface and the fourth surface, and the third surface is an absorbing surface; facing away from beam splitter a2 and near the third surface is a fourth surface, which is a refractive surface; facing away from the beam splitter a2 and near the fourth surface is a fifth surface, which is a reflective surface.
Specifically, the three-dimensional display source a1 provides a three-dimensional image source for the system, and light emitted from the three-dimensional display source a1 is firstly incident on the beam splitter a2, is partially reflected by the beam splitter a2 and then is incident on the concentric sphere suspension device array A3. Wherein the concentric sphere suspension device array A3 is perpendicular to the three-dimensional display source A1; as shown in fig. 2, the included angle α 1 between the beam splitter a2 and the three-dimensional display source a1 is 30 ° to 60 °. The three-dimensional display source a1 provides a three-dimensional content source for the system, providing viewing content for the viewer. The three-dimensional display source a1 may be a 3D display manufactured by slit grating, a 3D display manufactured by lenticular grating, a 3D display manufactured by lens array, a 3D display manufactured by optical holographic method, a 3D display manufactured by polarized light stereoscopic glasses, or a pyramid-shaped 3D display composed of prisms.
The concentric sphere suspension device array a3 is an array structure composed of concentric sphere suspension devices. As shown in fig. 2, the concentric sphere suspension device is a concentric sphere structure, which is composed of two concentric spheres made of a material with a fixed refractive index, and has five surfaces, i.e., a first surface (i.e., the surface 1 in fig. 2), a second surface (i.e., the surface 2 in fig. 2), a third surface (i.e., the surface 3 in fig. 2), a fourth surface (i.e., the surface 4 in fig. 2), and a fifth surface (i.e., the surface 5 in fig. 2). Wherein, one side close to the spectroscope A2 is a first surface, namely the first surface is the surface close to the spectroscope in a larger concentric sphere, and the first surface is a refractive surface; the surface which is away from the beam splitter a2 and close to the first surface is a second surface, namely the second surface is the surface close to the first surface in a smaller concentric sphere, and the second surface is a refractive surface; the third surface is located between the second surface and the fourth surface, is a surface between two concentric spheres, and is an absorbing surface; the surface which is far away from the beam splitter A2 and close to the third surface is a fourth surface, namely the fourth surface is the surface which is far away from the beam splitter in a smaller concentric sphere and close to the third surface, and the fourth surface is a refractive surface; the surface facing away from the beam splitter a2 and close to the fourth surface is a fifth surface, i.e., the fifth surface is the surface facing away from the beam splitter in a larger concentric sphere and close to the fourth surface, and the fifth surface is a reflective surface.
The surface 1 firstly refracts and modulates incident light, the light refracted and modulated by the surface 1 is divided into two parts, wherein small-angle incident light incident to the middle part of the surface 1 can be refracted to the surface 2, the surface 2 refracts and modulates the part of light, the light refracted and modulated by the surface 2 is incident to the surface 4, the surface 4 refracts and modulates the light again, the light refracted and modulated by the surface 4 is incident to the surface 5, the light incident to the surface 5 is reflected, then sequentially passes through the surface 4, the surface 2 and the surface 1, finally exits from the surface 1, a large-view suspended three-dimensional image A4 is formed on the other side of the spectroscope, and the suspended three-dimensional image A4 is received by an eye A5 of an observed person; and the large-angle incident light rays incident to the edge part of the surface 1 are modulated by the surface 1, then enter the surface 3 and are absorbed by the surface 3, and cannot be emitted. The concentric sphere suspension device selectively reflects and absorbs the light rays with different angles incident on the surface 1, so that the light rays with large angles are absorbed, the serious aberration caused by the light rays with large angles is eliminated, and the definition of the suspended three-dimensional image is improved; meanwhile, light rays incident at a small angle are guaranteed to participate in forming the suspended three-dimensional image, and the visual range and the display brightness of the suspended three-dimensional image are guaranteed.
Fig. 3 is a schematic diagram of light reflected by a concentric sphere suspension device according to an embodiment of the present invention, and as shown in fig. 3, in a suspended three-dimensional display device, the surface 1 has two roles:
refraction modulation is carried out on light rays which are emitted by the three-dimensional display source A1 and reflected by the spectroscope A2, wherein small-angle light rays O4O5 are refracted and incident on the surface 2, and large-angle light rays O1O2 are refracted and incident on the surface 3;
the light ray O10O11 reflected and modulated by the surface 2 is refracted again and emitted from the surface 1 to form O11O12, which participates in the formation of the floating three-dimensional image.
Face 2 is a refractive surface capable of refractive modulation of light incident on face 2 and functions to:
the light ray O5O6 refracted by the surface 1 and incident on the surface 2 is refracted again to form a light ray O6O7 and incident on the surface 4;
the light ray O9O10 reflected and modulated by the surface 5 is refracted to form O10O11, and is emitted from the surface 2.
Face 3 is an absorbing surface capable of absorbing light incident on face 3 and functions to: the light ray O2O3 refracted by the surface 1 and incident on the surface 3 is absorbed and does not exit.
Face 4 is a refractive surface capable of refractive modulation of light incident on face 2 and functions to:
the light ray O6O7 refracted by the surface 2 and incident on the surface 4 is refracted again to form a light ray O7O8 and incident on the surface 5;
the light ray O8O9 reflected and modulated by the surface 5 is refracted to form O9O10, and is emitted from the surface 4.
The surface 5 is a reflective surface which can perform reflective modulation on light incident on the surface 5, and has the following functions: the light ray O7O8 refracted by the surface 4 and incident on the surface 5 is reflected to form a light ray O8O9 and incident on the surface 4.
The concentric sphere suspension device can be manufactured through a UV curing molding process, and the material used is UV glue. In addition, the material can be plastic resin material (such as PMMA, PC, COC, POLYCARB, etc.); or the material can be made by cold processing technology such as traditional grinding, and the material can be various glass materials (such as crown glass, flint glass, dense crown glass, dense flint glass or LA series glass, etc.); the transmission surface can be coated with an optical film (such as an anti-reflection and anti-reflection film) to improve the optical performance of the structure, and the reflection surface needs to be coated with a reflection film to achieve the effect of reflecting light. The absorption surface needs to be subjected to absorption treatment to achieve the effect of absorbing light.
According to the equipment provided by the embodiment of the invention, the concentric sphere suspension device array is arranged to reflect incident light, wherein the concentric sphere suspension device can enable small-angle incident light incident to the middle part of the first surface to pass through the second surface, the fourth surface and the fifth surface and to be emergent from the first surface again to participate in forming a large-visual-angle suspension three-dimensional image; and the large-angle incident light rays incident to the edge part of the first surface are absorbed and cannot be emitted, so that the definition of the finally formed suspension three-dimensional image is improved.
Based on any embodiment, the concentric sphere suspension device consists of two concentric spheres with different radiuses; the duty ratio of the concentric sphere suspension device is within the interval range of (0.1, 0.8); the duty cycle is the ratio of the radius of the smaller concentric sphere to the radius of the larger concentric sphere in the concentric sphere suspension device.
Specifically, fig. 4 is a schematic structural diagram of a concentric sphere suspension device according to an embodiment of the present invention, and as shown in fig. 4, the concentric sphere suspension device is composed of two concentric spheres with different radii (R1 ≠ R2), and the width of the surface 3 is D1. In order to improve the quality of the floating 3D image while not seriously degrading the brightness of the floating 3D image, a duty ratio concept is proposed here. Here, the duty ratio of the concentric sphere suspension device is set to R1/R2, and 0.1< R1/R2<0.8 is defined to minimize the decrease degree of the brightness of the suspended three-dimensional image while improving the definition of the suspended three-dimensional image.
According to any of the above embodiments, the radius of the concentric spheres is within the interval of (0mm, 10 mm); the concentric sphere suspension device is filled with materials with different refractive indexes.
Specifically, as shown in fig. 4, the radius R1 may range from 0mm < R1<10mm, the radius R2 may also range from 0mm < R2<10mm, and R1< R2. Furthermore, the concentric sphere suspension device may be filled with materials with different refractive indexes, as shown in fig. 4, the refractive indexes of the filling materials of the left hemisphere facing the face 4 and the right hemisphere facing the face 2 in the smaller concentric sphere are N1 and N3, the refractive indexes of the filling materials of the left hemisphere facing the face 5 and the right hemisphere facing the face 1 in the larger concentric sphere are N2 and N4, and N1, N2, N3 and N4 may be the same or different. Wherein the refractive index range of each filling material is: 2 is more than or equal to N1 more than 1, 2 is more than or equal to N2 more than 1, 2 is more than or equal to N3 more than 1 and 2 is more than or equal to N4 more than 1.
Based on any of the above embodiments, the beam splitter is an optical beam splitter; the sum of the distance from the central point of the spectroscope to the three-dimensional display source and the distance from the central point of the spectroscope to the concentric sphere suspension device array is larger than 50 mm.
Specifically, the optical beam splitter is an optical device which can partially transmit and partially reflect light and is independent of polarization, and the substrate material of the optical beam splitter is transparent glass, transparent plastic or other transparent materials, and then the surface of the substrate is coated with a film to achieve the functions of partially transmitting and partially reflecting light. The size and thickness of the device can be set according to actual requirements.
As shown in FIG. 2, the distance from the beam splitter center point to the three-dimensional display source is L1, and the distance from the beam splitter center point to the concentric sphere suspension device array is L2. To optimize the floating display effect, the sum of L1 and L2 can be set to be greater than 50mm when placing the dichroic mirror, three-dimensional display source, and concentric sphere floating device array.
Based on any of the above embodiments, the transmittance range of the optical splitter is: 10% -70%, the reflectivity range of the optical spectroscope is as follows: 30 to 90 percent.
Specifically, the transmittance range of the optical spectroscope is: 1% to 99%, the preferred transmission range is: 10% -70%, the reflectivity range is as follows: 1% to 99%, the preferred reflectance range is: 30 to 90 percent.
In any of the above embodiments, the beam splitter is a polarizing beam splitter;
the suspension three-dimensional display equipment further comprises a quarter-wave phase modulation device, or further comprises a quarter-wave phase modulation device and a linear polarizer;
the linear polarizer is positioned between the polarizing beam splitter and the three-dimensional display source and is parallel to the three-dimensional display source; the quarter-wave phase modulation device is positioned between the polarizing beam splitter and the concentric sphere suspension device array and is parallel to the concentric sphere suspension device array.
In particular, the beam splitter is a polarizing beam splitter. The polarization beam splitter is an optical device which is polarization-dependent and can efficiently reflect linearly polarized light in a specific vibration direction and efficiently transmit linearly polarized light in another specific vibration direction. Fig. 5 is a schematic diagram of the polarization beam splitter provided in the embodiment of the present invention, as shown in fig. 5, the polarization beam splitter can reflect linearly polarized light in a specific vibration direction, and at this time, for the reflected linearly polarized light, the polarization beam splitter acts like a reflecting mirror (as shown in the left side of fig. 5); it is also possible to transmit for linearly polarized light of a certain vibration direction, in which case the polarizing beam splitter acts like a transparent plate (as shown on the right side of fig. 5) for the linearly polarized light to be transmitted.
Fig. 6 is a second schematic structural diagram of the floating three-dimensional display device according to the embodiment of the present invention when the light emitted by the three-dimensional display source a1 is linearly polarized light, and as shown in fig. 6, the device may include a three-dimensional display source, a polarization beam splitter, a concentric sphere floating device array, and a quarter-wavelength phase modulation device. The quarter-wave phase modulation device is positioned between the polarizing beam splitter and the concentric sphere suspension device array and is parallel to the concentric sphere suspension device array.
In addition, fig. 7 is a third schematic structural diagram of a floating three-dimensional display apparatus according to an embodiment of the present invention, and as shown in fig. 7, the apparatus includes a three-dimensional display source, a polarizing beam splitter, a concentric sphere suspension device array, a quarter-wavelength phase modulation device, and a linear polarizer. The linear polarizer is positioned between the polarizing beam splitter and the three-dimensional display source and is parallel to the three-dimensional display source; the quarter-wave phase modulation device is positioned between the polarizing beam splitter and the concentric sphere suspension device array and is parallel to the concentric sphere suspension device array. If the light emitted from the three-dimensional display source a1 is linearly polarized light, the transmission axis direction of the linear polarizer B3 may be set to be the same as the vibration direction of the linearly polarized light emitted from the three-dimensional display source a 1. Here, the linear polarizer B3 is a device that converts light in an arbitrary state into linearly polarized light having a vibration direction parallel to the transmission axis direction of the linear polarizer, and functions to convert light emitted from the three-dimensional display source a1 into linearly polarized light. The polarizing beam splitter may reflect linearly polarized light having a vibration direction parallel to the transmission axis of linear polarizer B3, and transmit linearly polarized light having a vibration direction perpendicular to the transmission axis of linear polarizer B3. The quarter-wave phase modulation device B4 is an optical device that produces a quarter-wave phase retardation for incident polarized light and is characterized by the presence of an optical axis. If linearly polarized light is incident, the linearly polarized light may be converted into circularly polarized light, and if circularly polarized light is incident, the circularly polarized light may be converted into linearly polarized light.
By arranging the polarization beam splitter and adding the quarter-wavelength phase modulation device and the linear polarizer, or when the light emitted by the three-dimensional display source A1 is linearly polarized light, the linear polarizer is removed or the light transmission axis direction of the linear polarizer B3 is set to be the same as the vibration direction of the linearly polarized light emitted by the three-dimensional display source A1, so that the brightness of the suspended three-dimensional image can be improved.
According to the equipment provided by the embodiment of the invention, the polarization beam splitter is arranged, the quarter-wavelength phase modulation device and the linear polarizer are added, or when the light emitted by the three-dimensional display source A1 is linearly polarized light, the linear polarizer is removed or the light transmission axis direction of the linear polarizer B3 is set to be the same as the vibration direction of the linearly polarized light emitted by the three-dimensional display source A1, so that the brightness of the suspended three-dimensional image is improved.
Based on any of the above embodiments, the sum of the distance from the central point of the polarizing beam splitter to the linear polarizer, the distance from the central point of the polarizing beam splitter to the quarter-wave phase modulation device, the distance from the linear polarizer to the three-dimensional display source, and the distance from the quarter-wave phase modulation device to the concentric sphere suspension device array is greater than 50 mm.
Specifically, as shown in fig. 7, the distance from the central point of the polarizing beam splitter to the linear polarizer is L1, the distance from the central point of the polarizing beam splitter to the quarter-wave phase modulation device is L2, the distance from the linear polarizer to the three-dimensional display source is L3, and the distance from the quarter-wave phase modulation device to the concentric sphere suspension device array is L4. In placing the components, it may be provided that the sum of L1, L2, L3 and L4 is more than 50 mm.
Based on any of the embodiments described above, the angle between the direction of the linearly polarized light vibration incident to the quarter-wavelength phase modulation device and the optical axis direction of the quarter-wavelength phase modulation device is ± 45 ° or ± 135 °.
Specifically, in order to optimize the floating display effect, an angle between the vibration direction of linearly polarized light incident to the quarter-wavelength phase modulation device and the optical axis direction of the quarter-wavelength phase modulation device may be set to ± 45 ° or ± 135 °.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A suspended three-dimensional display device based on an array of concentric sphere suspension devices, comprising: a three-dimensional display source, a spectroscope and a concentric sphere suspension device array;
wherein the array of concentric sphere suspension devices is perpendicular to the three-dimensional display source; the included angle between the spectroscope and the three-dimensional display source is 30-60 degrees; the concentric sphere suspension device array and the formed suspension three-dimensional image are respectively positioned on two sides of the spectroscope;
the concentric sphere suspension device array is an array structure consisting of concentric sphere suspension devices, and each concentric sphere suspension device comprises a first surface, a second surface, a third surface, a fourth surface and a fifth surface; the surface of one side of the larger concentric sphere close to the spectroscope is the first surface, and the first surface is a refractive surface; the surface of the smaller concentric sphere that is closer to the first surface is the second surface, which is a refractive surface; said third surface is located between said second surface and said fourth surface, said third surface being a surface between two concentric spheres, said third surface being an absorbing surface; the surface of the smaller concentric sphere facing away from the beam splitter and closer to the third surface is the fourth surface, which is a refractive surface; the surface of the larger concentric sphere facing away from the beam splitter and closer to the fourth surface is the fifth surface, which is a reflective surface.
2. The array of concentric sphere suspension devices-based floating three-dimensional display device of claim 1, wherein the concentric sphere suspension devices are composed of two concentric spheres with unequal radii; the duty ratio of the concentric sphere suspension device is within the interval range of (0.1, 0.8); the duty ratio is the ratio of the radius of the smaller concentric sphere to the radius of the larger concentric sphere in the concentric sphere suspension device.
3. The array of concentric sphere-based levitating devices of claim 2, wherein the radius of said concentric spheres is within the interval of (0mm, 10 mm); the concentric sphere suspension device is formed by filling materials with different refractive indexes.
4. The suspended three-dimensional display device based on the concentric sphere suspension device array of any one of claims 1 to 3, wherein the beam splitter is an optical beam splitter;
the sum of the distance from the central point of the spectroscope to the three-dimensional display source and the distance from the central point of the spectroscope to the concentric sphere suspension device array is larger than 50 mm.
5. The suspended three-dimensional display apparatus based on the array of concentric sphere suspension devices of claim 4, wherein the transmittance range of the optical beam splitter is: 10% -70%, the reflectivity range of the optical spectroscope is as follows: 30 to 90 percent.
6. The suspended three-dimensional display device based on the concentric sphere suspension device array of any one of claims 1 to 3, wherein the beam splitter is a polarizing beam splitter;
the suspension three-dimensional display equipment further comprises a quarter-wavelength phase modulation device, or further comprises a quarter-wavelength phase modulation device and a linear polarizer;
the linear polarizer is positioned between the polarizing beam splitter and the three-dimensional display source and is parallel to the three-dimensional display source; the quarter-wave phase modulation device is positioned between the polarizing beam splitter and the concentric sphere suspension device array and is parallel to the concentric sphere suspension device array.
7. The suspended three-dimensional display apparatus based on the array of concentric sphere suspension devices of claim 6, wherein the sum of the distance from the polarizing beam splitter center point to the linear polarizer, the distance from the polarizing beam splitter center point to the quarter wave phase modulation device, the distance from the linear polarizer to the three-dimensional display source, and the distance from the quarter wave phase modulation device to the array of concentric sphere suspension devices is greater than 50 mm.
8. The suspended three-dimensional display apparatus based on the array of concentric sphere suspension devices as claimed in claim 6, wherein the angle between the vibration direction of the linearly polarized light incident to the quarter wavelength phase modulation device and the optical axis direction of the quarter wavelength phase modulation device is ± 45 ° or ± 135 °.
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