CA2289999C - Holographic statue projection device - Google Patents
Holographic statue projection device Download PDFInfo
- Publication number
- CA2289999C CA2289999C CA 2289999 CA2289999A CA2289999C CA 2289999 C CA2289999 C CA 2289999C CA 2289999 CA2289999 CA 2289999 CA 2289999 A CA2289999 A CA 2289999A CA 2289999 C CA2289999 C CA 2289999C
- Authority
- CA
- Canada
- Prior art keywords
- projection device
- holographic projection
- holographic
- displaying
- dimensional image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000005034 decoration Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- G03H1/24—Processes or apparatus for obtaining an optical image from holograms using white light, e.g. rainbow holograms
-
- 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
- G03H1/2249—Holobject properties
-
- 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
- G03H1/0005—Adaptation of holography to specific applications
- G03H2001/0055—Adaptation of holography to specific applications in advertising or decorative art
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2210/00—Object characteristics
- G03H2210/30—3D object
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Holo Graphy (AREA)
Abstract
A holographic projection device for displaying a 3-dimensional image has a cylindrical casing, diagonally-cut cylindrical mount, and a circular or elliptical reflection-type hologram in order to project an upright orthoscopic real image or a combination of real and virtual images having both horizontal and vertical parallaxes, perpendicularly to the horizon. The diagonally-placed hologram is illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to means integrated into the holographic projection device. The holographic projection device may comprise an electric motor for rotatably oscillating the hologram in order to display the front and sides of the 3-dimensional image of a statue. The holographic projection device may comprise a motion sensor or an audio sensor for switching on for a pre-set length of time. The holographic projection device may comprise a sound chip for producing a voice or music effect. This invention relates to holographic projection devices for displaying a 3-dimensional image, and the principal use of the invention is for optical decoration.
Description
Description Title Holographic Statue Projection Device Technical Field This invention relates to holographic projection devices fo~_ displaying a 3-dimensional image, more particularly to a holographic projection device for displaying a 3-dimensional image of a statue.
Background Art There are many instances where it would be desirable to be able to have a compact holographic projection device for displaying a 3-dimensional image such as a statue.
A large number of patents disclose holographic projection devices with different configurations for displaying holographic images.
These prior art arrangements have a hologram placed vertically to project an upright virtual or real holographic image. When placed horizontally, a conventional hologram projector a 3-dimensional virtual or real holographic image horizontally, parallel to the hologram.
Canadian Application 2 277 653 discloses a "Cylindrical Holographic Display Device" for displaying an upright holographic' image perpendicularly to the hologram. However, this prior art suffers from a limited viewing angle, and a small height of the upright holographic image.
Canadian Application 2 278 110 discloses a "Holographic Display Device with a Paraboloidal Hologram" for displaying an upright holographic image perpendicularly to the hologram having a wider viewing angle. However, this prior art applies only to transmission-type holograms, and is too complex and difficult to manufacture.
Description of the Invention It is a primary object of the invention to provide a holographic projection device with a circular or elliptical hologram for displaying an upright holographic image having both horizontal and vertical parallaxes.
It is another object of the invention to provide means for rotatably oscillating the circular or elliptical hologram.
A holographic projection device for displaying a 3-dimensional image has a cylindrical casing, diagonally-cut cylindrical mount, and a circular or elliptical reflection-type hologram in order to project an upright orthoscopic real image or-a combination of real and virtual images having both horizontal and vertical parallaxes, perpendicularly to the horizon. The diagonally-placed hologram is illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to means integrated into the holographic projection device. The holographic projection device may comprise an electric motor for rotatably oscillating the hologram in order to display the front and sides of the 3-dimensional image of a statue. The holographic projection device may comprise a motion sensor or an audio sensor for switching on for a pre-set length of time. The holographic projection device may comprise a sound chap for producing a voice or music effect.
Brief Description of the Figures in the Drawings In drawings which illustrate embodiments of the invention:
Figure 1 marked "Prior Art" is a perspective view of a conventional holographic projection device with a reflection-typE~
hologram;
Figure 2 is a perspective view of one embodiment of a holographic projection device with a circular or elliptical reflection-type hologram according to the invention;
Figure 3 is a sectional view of the invention along line I-I of Figure 2; and Figure 4 is a sectional view of the invention along line I I - I I of Figure 2 .
Modes for Carrying Out the Invention In one prior art holographic projection device shown in Figure 1 marked "Prior Art", a circular reflection-type hologram 1- 1 is illuminated by a point source of white light 1 - 4 from abcwe in order to project an orthoscopic real image 1- 6. Means for mounting the point source of white light 1-5 is securely attached to a cylindrical casing 1 -3. A circular mount for supporting the hologram 1- 2 is attached to the top end of the cylindrical casing 1- 3. A motor inside the cylindrical casing 1 - 3 rotates the circular reflection-type hologram 1- 1.
In this prior art holographic projection device, the flatly-placed circular reflection-type hologram 1- 1 projects a holographic image 1- 6 into a conical field of view around a vertical axis at the centre of the circular reflection-type hologram 1-1, as indicated in the figure.
In one embodiment of the invention shown in Figure 2, a circular or elliptical reflection-type hologram 2 -1 is detachably placed on a diagonally-cut cylindrical mount 2 -2, which is rotatably attached to a cylindrical casing 2 -3. A point source ~of white light 2 - 4 for illuminating the hologram is securely attached to means for mounting the point source of white light 2 - 5. The means for mounting the point source of white light 2 - 5 is securely attached to the diagonally-cut cylindrical mount 2 -2, or to the cylindrical casing 2 -3. A motor inside the cylindrical casing 2 - 3 rotatably oscillates the circular or elliptical reflection-type hologram 2 -1.
The circular or elliptical reflection-type hologram 2 - 1 projects an upright orthoscopic real image or a combination of real and virtual images 2 - 6 having both horizontal and vertical parallaxes, perpendicularly to the level floor. The upper portion of the upright holographic image may be an orthoscopic real image in front of the hologram, while the lower portion of the upright holographic image may be an orthoscopic virtual image behind the hologram.
The holographic image is projected perpendicularly to the level floor when the rotational axis of the reflection-type hologram 2 - 1 at pi/2 radian (90 degrees) from the level floor is positioned in alignment with the rotational axis of the cylindrical mount 2 - 2 at pi/2 radian (90 degrees) from the level floor.
According to the present invention, the diagonally-placed circular or elliptical reflection-type hologram 2 - 1 projects a holographic image 2 - 6 into a conical field of view around a diagonal axis at the centre of the circular or elliptical reflection-type hologram 2 - 1, as indicated in the figure.
Although the angle of view is the same as that of the prior art holographic projection device, the conical field of view enables side-viewing of the holographic image, while disabling back-viewing of the holographic image.
The size of a holographic image is proportional to the area of the hologram visible to a viewer. Since the visible area of a diagonally-placed hologram is greater than the visible area of a flatly-placed hologram, the diagonally-placed hologram enables the height of the holographic image to be increased relative to the diameter of the circular or elliptical hologram, compared with the flatly-placed hologram of the prior art.
Figure 3 shows a sectional view of the holographic projection device along line I-I of Figure 2. Figure 4 shows a sectional view of the holographic projection device along line II-II of Figure 2. A unit comprising a power supply and a control circuit 3 - 1 is securely attached to the interior of the cylindrical casing 2 -3, and is operably connected to the point source of white Light 2 - 4 in order to illuminate the circular or elliptical reflection-type hologram 2 -1. Holding means may be provided at the top and the bottom of the diagonally-cut cylindrical mount 2 -2 in order to detachably hold the circular or elliptical reflection-type hologram 2 - 1 in place. Bearing means such as a magnetic bearing or a ball bearing may be provided in order to reduce friction between the diagonally-cut cylindrical mount 2 -2 and the cylindrical casing 2 -3. Switching means may be provided in order to control the unit comprising a power supply and a control circuit 3 - 1.
An electric motor 3 -2, securely attached to the interior of the cylindrical casing 2 - 3 and operably connected to the unit comprising a power supply and a control circuit 3 - l, may be provided for rotatably oscillating the diagonally-cut cylindrical mount 2 -2 in order to progressively display the front and sides of the holographic image by up to pi radian (180 degrees).
An extra unit 3 - 3, securely attached to the interior of the cylindrical casing 2 -3 and operably connected to the unit comprising a power supply and a control circuit 3 - 1, may house a motion sensor or an audio sensor for switching on the power supp7_y for a pre-set length of time. The extra unit 3 -3 may also house a sound chip for producing a voice or music effect.
Preferably, the circular or elliptical reflection-type hologram 2 - 1 is computer-generated and has full colour. The holographic image may be superimposed with a real object having the same shape and size as the holographic image in order to demonstrate a phantom effect. The circular or elliptical reflection-type hologram 2 - 1 may be double-sided in order to include 2 different holographic images.
Preferably, the point source of white light 2 - 4 is a high-efficiency light emitting diode. The means for mounting the point source of white light 2 - 5 may be telescopically or flexibly extensible so that the angle of incidence may be adjusted.
Background Art There are many instances where it would be desirable to be able to have a compact holographic projection device for displaying a 3-dimensional image such as a statue.
A large number of patents disclose holographic projection devices with different configurations for displaying holographic images.
These prior art arrangements have a hologram placed vertically to project an upright virtual or real holographic image. When placed horizontally, a conventional hologram projector a 3-dimensional virtual or real holographic image horizontally, parallel to the hologram.
Canadian Application 2 277 653 discloses a "Cylindrical Holographic Display Device" for displaying an upright holographic' image perpendicularly to the hologram. However, this prior art suffers from a limited viewing angle, and a small height of the upright holographic image.
Canadian Application 2 278 110 discloses a "Holographic Display Device with a Paraboloidal Hologram" for displaying an upright holographic image perpendicularly to the hologram having a wider viewing angle. However, this prior art applies only to transmission-type holograms, and is too complex and difficult to manufacture.
Description of the Invention It is a primary object of the invention to provide a holographic projection device with a circular or elliptical hologram for displaying an upright holographic image having both horizontal and vertical parallaxes.
It is another object of the invention to provide means for rotatably oscillating the circular or elliptical hologram.
A holographic projection device for displaying a 3-dimensional image has a cylindrical casing, diagonally-cut cylindrical mount, and a circular or elliptical reflection-type hologram in order to project an upright orthoscopic real image or-a combination of real and virtual images having both horizontal and vertical parallaxes, perpendicularly to the horizon. The diagonally-placed hologram is illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to means integrated into the holographic projection device. The holographic projection device may comprise an electric motor for rotatably oscillating the hologram in order to display the front and sides of the 3-dimensional image of a statue. The holographic projection device may comprise a motion sensor or an audio sensor for switching on for a pre-set length of time. The holographic projection device may comprise a sound chap for producing a voice or music effect.
Brief Description of the Figures in the Drawings In drawings which illustrate embodiments of the invention:
Figure 1 marked "Prior Art" is a perspective view of a conventional holographic projection device with a reflection-typE~
hologram;
Figure 2 is a perspective view of one embodiment of a holographic projection device with a circular or elliptical reflection-type hologram according to the invention;
Figure 3 is a sectional view of the invention along line I-I of Figure 2; and Figure 4 is a sectional view of the invention along line I I - I I of Figure 2 .
Modes for Carrying Out the Invention In one prior art holographic projection device shown in Figure 1 marked "Prior Art", a circular reflection-type hologram 1- 1 is illuminated by a point source of white light 1 - 4 from abcwe in order to project an orthoscopic real image 1- 6. Means for mounting the point source of white light 1-5 is securely attached to a cylindrical casing 1 -3. A circular mount for supporting the hologram 1- 2 is attached to the top end of the cylindrical casing 1- 3. A motor inside the cylindrical casing 1 - 3 rotates the circular reflection-type hologram 1- 1.
In this prior art holographic projection device, the flatly-placed circular reflection-type hologram 1- 1 projects a holographic image 1- 6 into a conical field of view around a vertical axis at the centre of the circular reflection-type hologram 1-1, as indicated in the figure.
In one embodiment of the invention shown in Figure 2, a circular or elliptical reflection-type hologram 2 -1 is detachably placed on a diagonally-cut cylindrical mount 2 -2, which is rotatably attached to a cylindrical casing 2 -3. A point source ~of white light 2 - 4 for illuminating the hologram is securely attached to means for mounting the point source of white light 2 - 5. The means for mounting the point source of white light 2 - 5 is securely attached to the diagonally-cut cylindrical mount 2 -2, or to the cylindrical casing 2 -3. A motor inside the cylindrical casing 2 - 3 rotatably oscillates the circular or elliptical reflection-type hologram 2 -1.
The circular or elliptical reflection-type hologram 2 - 1 projects an upright orthoscopic real image or a combination of real and virtual images 2 - 6 having both horizontal and vertical parallaxes, perpendicularly to the level floor. The upper portion of the upright holographic image may be an orthoscopic real image in front of the hologram, while the lower portion of the upright holographic image may be an orthoscopic virtual image behind the hologram.
The holographic image is projected perpendicularly to the level floor when the rotational axis of the reflection-type hologram 2 - 1 at pi/2 radian (90 degrees) from the level floor is positioned in alignment with the rotational axis of the cylindrical mount 2 - 2 at pi/2 radian (90 degrees) from the level floor.
According to the present invention, the diagonally-placed circular or elliptical reflection-type hologram 2 - 1 projects a holographic image 2 - 6 into a conical field of view around a diagonal axis at the centre of the circular or elliptical reflection-type hologram 2 - 1, as indicated in the figure.
Although the angle of view is the same as that of the prior art holographic projection device, the conical field of view enables side-viewing of the holographic image, while disabling back-viewing of the holographic image.
The size of a holographic image is proportional to the area of the hologram visible to a viewer. Since the visible area of a diagonally-placed hologram is greater than the visible area of a flatly-placed hologram, the diagonally-placed hologram enables the height of the holographic image to be increased relative to the diameter of the circular or elliptical hologram, compared with the flatly-placed hologram of the prior art.
Figure 3 shows a sectional view of the holographic projection device along line I-I of Figure 2. Figure 4 shows a sectional view of the holographic projection device along line II-II of Figure 2. A unit comprising a power supply and a control circuit 3 - 1 is securely attached to the interior of the cylindrical casing 2 -3, and is operably connected to the point source of white Light 2 - 4 in order to illuminate the circular or elliptical reflection-type hologram 2 -1. Holding means may be provided at the top and the bottom of the diagonally-cut cylindrical mount 2 -2 in order to detachably hold the circular or elliptical reflection-type hologram 2 - 1 in place. Bearing means such as a magnetic bearing or a ball bearing may be provided in order to reduce friction between the diagonally-cut cylindrical mount 2 -2 and the cylindrical casing 2 -3. Switching means may be provided in order to control the unit comprising a power supply and a control circuit 3 - 1.
An electric motor 3 -2, securely attached to the interior of the cylindrical casing 2 - 3 and operably connected to the unit comprising a power supply and a control circuit 3 - l, may be provided for rotatably oscillating the diagonally-cut cylindrical mount 2 -2 in order to progressively display the front and sides of the holographic image by up to pi radian (180 degrees).
An extra unit 3 - 3, securely attached to the interior of the cylindrical casing 2 -3 and operably connected to the unit comprising a power supply and a control circuit 3 - 1, may house a motion sensor or an audio sensor for switching on the power supp7_y for a pre-set length of time. The extra unit 3 -3 may also house a sound chip for producing a voice or music effect.
Preferably, the circular or elliptical reflection-type hologram 2 - 1 is computer-generated and has full colour. The holographic image may be superimposed with a real object having the same shape and size as the holographic image in order to demonstrate a phantom effect. The circular or elliptical reflection-type hologram 2 - 1 may be double-sided in order to include 2 different holographic images.
Preferably, the point source of white light 2 - 4 is a high-efficiency light emitting diode. The means for mounting the point source of white light 2 - 5 may be telescopically or flexibly extensible so that the angle of incidence may be adjusted.
Claims (8)
1. A holographic projection device for displaying a 3-dimensional image, comprising:
a circular or elliptical reflection-type hologram for projecting a holographic image, the holographic image having a rotational axis;
a cylindrical mount for supporting the reflection-type hologram, the cylindrical mount having a diagonally-cut top portion, the cylindrical mount having a rotational axis;
a cylindrical casing for rotatably supporting the cylindrical mount, the cylindrical casing having an interior portion, the cylindrical casing placed on a level floor;
a point source of white light for illuminating the reflection-type hologram;
means for mounting the point source of white light, securely attached to the cylindrical mount or to the cylindrical casing; and a unit comprising a power supply and a control circuit, securely attached to the interior portion of the cylindrical casing and operably connected to the point source of white light;
the reflection-type hologram projecting an upright orthoscopic real image or a combination of real and virtual images having both horizontal and vertical parallaxes, the holographic image being projected perpendicularly to the level floor when the rotational axis of the reflection-type hologram at pi/2 radian (90 degrees) from the level floor is positioned in alignment with the rotational axis of the cylindrical mount at pi/2 radian (90 degrees) from the level floor.
a circular or elliptical reflection-type hologram for projecting a holographic image, the holographic image having a rotational axis;
a cylindrical mount for supporting the reflection-type hologram, the cylindrical mount having a diagonally-cut top portion, the cylindrical mount having a rotational axis;
a cylindrical casing for rotatably supporting the cylindrical mount, the cylindrical casing having an interior portion, the cylindrical casing placed on a level floor;
a point source of white light for illuminating the reflection-type hologram;
means for mounting the point source of white light, securely attached to the cylindrical mount or to the cylindrical casing; and a unit comprising a power supply and a control circuit, securely attached to the interior portion of the cylindrical casing and operably connected to the point source of white light;
the reflection-type hologram projecting an upright orthoscopic real image or a combination of real and virtual images having both horizontal and vertical parallaxes, the holographic image being projected perpendicularly to the level floor when the rotational axis of the reflection-type hologram at pi/2 radian (90 degrees) from the level floor is positioned in alignment with the rotational axis of the cylindrical mount at pi/2 radian (90 degrees) from the level floor.
2. The holographic projection device for displaying a
3-dimensional image as defined in claim 1, further comprising:
an electric motor for rotatably oscillating the cylindrical mount in order to progressively display the front and sides of the holographic image, the electric motor securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
3. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, further comprising:
a motion sensor or an audio sensor for switching on the power supply for a pre-set length of time, the motion sensor securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
an electric motor for rotatably oscillating the cylindrical mount in order to progressively display the front and sides of the holographic image, the electric motor securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
3. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, further comprising:
a motion sensor or an audio sensor for switching on the power supply for a pre-set length of time, the motion sensor securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
4. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, further comprising:
a sound chip for producing a voice or music effect, the sound chip securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
a sound chip for producing a voice or music effect, the sound chip securely attached to the interior portion of the cylindrical casing and operably connected to the unit comprising a power supply and a control circuit.
5. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, in which the circular or elliptical reflection-type hologram is computer-generated, and has full colour.
6. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, in which the circular or elliptical reflection-type hologram is double-sided.
7. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, in which the point source of white light is a high-efficiency light emitting diode.
8. The holographic projection device for displaying a 3-dimensional image as defined in claim 1, in which the means for mounting the point source of white light is telescopically or flexibly extensible so that the angle of incidence may be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2289999 CA2289999C (en) | 1999-11-12 | 1999-11-12 | Holographic statue projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2289999 CA2289999C (en) | 1999-11-12 | 1999-11-12 | Holographic statue projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2289999A1 CA2289999A1 (en) | 2001-05-12 |
| CA2289999C true CA2289999C (en) | 2005-01-11 |
Family
ID=4164641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2289999 Expired - Fee Related CA2289999C (en) | 1999-11-12 | 1999-11-12 | Holographic statue projection device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2289999C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3722028B2 (en) * | 2001-07-05 | 2005-11-30 | ソニー株式会社 | Image reproduction device and image illumination device |
| KR101595104B1 (en) | 2008-07-10 | 2016-02-17 | 리얼 뷰 이미징 리미티드 | Broad viewing angle displays and user interfaces |
-
1999
- 1999-11-12 CA CA 2289999 patent/CA2289999C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2289999A1 (en) | 2001-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5311357A (en) | Device for the creation of three-dimensional images | |
| US8083377B2 (en) | LED light having projector with focus adjustment | |
| US5121229A (en) | Self-contained compact multi-color edge-lit holographic display | |
| JP2006346310A (en) | Showcase | |
| JP2013044874A (en) | Exhibition device | |
| CA2289999C (en) | Holographic statue projection device | |
| JP6618048B2 (en) | Illumination device and image recording medium | |
| US9039184B2 (en) | Compact three-dimensional virtual display system | |
| JP2010266696A (en) | All view type panoramic stereoscopic viewer device | |
| MY122921A (en) | Image reproducing apparatus and imgae illuminating apparatus | |
| CN208477890U (en) | A kind of cross holographic advertisement fan screen | |
| KR20010044267A (en) | Three dimensional image display apparatus using aspherical mirrors | |
| CA2277653C (en) | Cylindrical holographic display device | |
| CA2435245C (en) | Holographic statue with a magnetically mounted figurine | |
| CA2278110C (en) | Holographic display device with a paraboloidal hologram | |
| CN208284204U (en) | A kind of back projection type large size holographic projector | |
| CN209308989U (en) | A kind of flabellum is in the high definition holography advertisement fan screen of fan | |
| JP2011039470A (en) | Stereoscopic image viewing device | |
| CA2435250C (en) | Holographic statue with an auto-switch mechanism | |
| CA2474630C (en) | Life-size optical illusion device with reflection-type holograms | |
| CN214504133U (en) | Naked eye 3D display mechanism for holographic image | |
| JPS61502147A (en) | Improvements to hologram display | |
| CN215986888U (en) | Holographic projection device | |
| CN219145451U (en) | Personalized projection mechanism | |
| CN213019430U (en) | Starry sky lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |