CA2277653C - Cylindrical holographic display device - Google Patents
Cylindrical holographic display device Download PDFInfo
- Publication number
- CA2277653C CA2277653C CA 2277653 CA2277653A CA2277653C CA 2277653 C CA2277653 C CA 2277653C CA 2277653 CA2277653 CA 2277653 CA 2277653 A CA2277653 A CA 2277653A CA 2277653 C CA2277653 C CA 2277653C
- Authority
- CA
- Canada
- Prior art keywords
- hologram
- white light
- cylindrical casing
- point source
- holographic display
- 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
- 238000005034 decoration Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000001427 coherent effect Effects 0.000 description 2
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
Abstract
A holographic display device for displaying a 3-dimensional image has a cylindrical casing and a horizontally-placed circular reflection-type hologram in order to project an upright orthoscopic real image having both horizontal and vertical parallaxes. The hologram may be illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to telescopic or flexible means integrated into the holographic display device. The hologram may be rotated by an electric motor in order to display all sides of the holographic image. The means for mounting the point source of white light may have the same diameter as the cylindrical casing in order to slidably house the cylindrical casing. This invention relates to holographic display devices for displaying a 3-dimensional image, and the principal use of the invention is for optical decoration.
Description
Description Titl~
Cylindrical Holographic Display Device Technical Field This invention relates to holographic display devices for displaying a 3-dimensional image, more particularly to a cylindrical holographic display device.
Background Art There are many instances where it would be desirable to be able to have a compact holographic display devices for displaying a 3-dimensional image such as a statue.
A large number of patents disclose holographic display devices with different configurations for viewing holograms.
These prior art arrangements have a hologram placed vertically to view an upright image, either virtual or real. When placed horizontally, a conventional hologram projects a 3-dimensional image parallel to the hologram. Horizontally-placed holograms with an upright image have not been produced mainly because of the difficulty of providing a good point source of light. So-called "edge-illuminated holograms" tend to be dim.
Description of the Inv~ation It is a primary object of the invention to provide a holographic display device with a circular hologram to display an upright image.
It is another object of the invention to provide a point source of white light to illuminate the hologram.
It is another object of the invention to provide means for rotating the hologram.
A holographic display device for displaying a 3-dimensional image has a cylindrical casing and a horizontally-placed circular reflection-type hologram in order to project an upright orthoscopic real image having both horizontal and vertical parallaxes. The hologram may be illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to telescopic or flexible means integrated into the holographic display device. The hologram may be rotated by an electric motor in order to display all sides of the holographic image. The means for mounting the point source of white light may have the same diameter as the cylindrical casing in order to slidably house the cylindrical casing.
Brief Description of the i~igures in the Drawings In drawings which illustrate embodiments of the invention:
gigure 1 marked "prior ~lrt" is a perspective view of a conventional holographic display arrangement for a transmission-type hologram;
Figure 2 marked "Prior Art" is a perspective view of a conventional holographic display arrangement for a reflection-type hologram;
Figure 3 is a perspective view of one embodiment of a holographic display device with a circular reflection-type hologram according to the invention;
Figure 4 is a sectional view of the invention along line I- I
of Figure 3;
Figure 5 is a perspective view of another embodiment of a holographic display device with a circular reflection-type hologram according to the invention;
Figure 6 is a sectional view of the invention along line I-I
of Figure 5;
Figure 7 is a perspective view of another embodiment of a holographic display device according to the invention with the cylindrical casing closed; and Figure 8 is a perspective view of another embodi~lent of a holographic display device of Figure 7 with the cylindrical casing open.
lodes for Carrying Out the invention In one conventional holographic display configuration shown in Figur~ 1 marked "Prior Art", a point source of either coherent or white light 1 - 4 illuminates a rectangular transmission-type hologram 1- 1 from the back in order to project an orthoscopic real or virtual image 1 -3. In another conventional holographic display configuration shown in Figure 2 marked "P ri o r Art", a point source of either coherent or white light 2 - 4 illuminates a rectangular reflection-type hologram 2 - 1 from the front in order to project an orthoscopic real or virtual image 2-3.
In both of these conventional holographic display configurations, an orthoscopic real or virtual image is oriented parallel to the hologram. According to the present invention, a circular reflection-type hologram has both horizontal and vertical parallaxes, and an orthoscopic real image is oriented perpendicular to the hologram.
In one embodi~nt of the invention shown in Figure 3, a circular reflection-type hologram 3 - 1 is illuminated by a point source of white light 3 -4 from above in order to project an orthoscopic real image 3 -3. Means for mounting the point source of white light 3 - 5 is securely attached to a cylindrical casing 3-2.
Figure 4 shows a sectional view of the holographic display device along line i- I of Figure 3. A circular mount for supporting the hologram 4- 1 is attached to the top end of the cylindrical casing 3 -2. A power supply and a control circuit 4 -3 are securely attached to the cylindrical casing 3 - 2, and are operably connected to the point source of white light 3 - 4 in order to illuminate the hologram.
Preferably, the point source of white light 3 - 4 is a high-efficiency light emitting diode. The means for mounting the point source of white light 3 - 5 may be telescopically or flexibly extensible so that the angle of incidence may be adjusted.
In another embodiment of the invention shown in Figure 5, a circular reflection-type hologram 5 - 1 projects an orthoscopic real image 5 -3. The circular reflection-type hologram 5 - 1 rotates inside a cylindrical casing 5-2.
Figure 6 shows a sectional view of the holographic display device along line I - I of Figure 5. A circular mount for supporting the hologram 6 - 1 has a plurality of legs at the bottom, comically converging to one point, and is rotatably attached to the top end of the cylindrical casing 5 -a. A power supply and a control circuit 6 -3 are securely attached to the cylindrical casing 5-2, and are operably connected to an electric motor 6 - 4 in order to rotate the circular mount for supporting the hologram 6-1.
In Figure 7, means for mounting the point source of white light 7 - 5 is substantially cylindrical and hollow, and has the same diameter as a cylindrical casing 7 -2 in order to slidably house the cylindrical casing 7 -2 at the bottom. Figure 8 shows the cylindrical casing 7 -2 open in order to expose a circular reflection-type hologram 8 - l, and to p=oject an orthoscopic real image 8 -3 when illuminated by a point source of white light 7 - 4.
An electric motor may be provided inside the cylindrical casing 7 - 2 in order to rotate the circular reflection-type hologram 8 - 1.
Preferably, the circular reflection-type hologram is computer-generated and has full colour. The holographic image may be overlaid with a real object having the same shape and size as the holographic image.
Cylindrical Holographic Display Device Technical Field This invention relates to holographic display devices for displaying a 3-dimensional image, more particularly to a cylindrical holographic display device.
Background Art There are many instances where it would be desirable to be able to have a compact holographic display devices for displaying a 3-dimensional image such as a statue.
A large number of patents disclose holographic display devices with different configurations for viewing holograms.
These prior art arrangements have a hologram placed vertically to view an upright image, either virtual or real. When placed horizontally, a conventional hologram projects a 3-dimensional image parallel to the hologram. Horizontally-placed holograms with an upright image have not been produced mainly because of the difficulty of providing a good point source of light. So-called "edge-illuminated holograms" tend to be dim.
Description of the Inv~ation It is a primary object of the invention to provide a holographic display device with a circular hologram to display an upright image.
It is another object of the invention to provide a point source of white light to illuminate the hologram.
It is another object of the invention to provide means for rotating the hologram.
A holographic display device for displaying a 3-dimensional image has a cylindrical casing and a horizontally-placed circular reflection-type hologram in order to project an upright orthoscopic real image having both horizontal and vertical parallaxes. The hologram may be illuminated by a point source of white light, preferably a high-efficiency light emitting diode, securely attached to telescopic or flexible means integrated into the holographic display device. The hologram may be rotated by an electric motor in order to display all sides of the holographic image. The means for mounting the point source of white light may have the same diameter as the cylindrical casing in order to slidably house the cylindrical casing.
Brief Description of the i~igures in the Drawings In drawings which illustrate embodiments of the invention:
gigure 1 marked "prior ~lrt" is a perspective view of a conventional holographic display arrangement for a transmission-type hologram;
Figure 2 marked "Prior Art" is a perspective view of a conventional holographic display arrangement for a reflection-type hologram;
Figure 3 is a perspective view of one embodiment of a holographic display device with a circular reflection-type hologram according to the invention;
Figure 4 is a sectional view of the invention along line I- I
of Figure 3;
Figure 5 is a perspective view of another embodiment of a holographic display device with a circular reflection-type hologram according to the invention;
Figure 6 is a sectional view of the invention along line I-I
of Figure 5;
Figure 7 is a perspective view of another embodiment of a holographic display device according to the invention with the cylindrical casing closed; and Figure 8 is a perspective view of another embodi~lent of a holographic display device of Figure 7 with the cylindrical casing open.
lodes for Carrying Out the invention In one conventional holographic display configuration shown in Figur~ 1 marked "Prior Art", a point source of either coherent or white light 1 - 4 illuminates a rectangular transmission-type hologram 1- 1 from the back in order to project an orthoscopic real or virtual image 1 -3. In another conventional holographic display configuration shown in Figure 2 marked "P ri o r Art", a point source of either coherent or white light 2 - 4 illuminates a rectangular reflection-type hologram 2 - 1 from the front in order to project an orthoscopic real or virtual image 2-3.
In both of these conventional holographic display configurations, an orthoscopic real or virtual image is oriented parallel to the hologram. According to the present invention, a circular reflection-type hologram has both horizontal and vertical parallaxes, and an orthoscopic real image is oriented perpendicular to the hologram.
In one embodi~nt of the invention shown in Figure 3, a circular reflection-type hologram 3 - 1 is illuminated by a point source of white light 3 -4 from above in order to project an orthoscopic real image 3 -3. Means for mounting the point source of white light 3 - 5 is securely attached to a cylindrical casing 3-2.
Figure 4 shows a sectional view of the holographic display device along line i- I of Figure 3. A circular mount for supporting the hologram 4- 1 is attached to the top end of the cylindrical casing 3 -2. A power supply and a control circuit 4 -3 are securely attached to the cylindrical casing 3 - 2, and are operably connected to the point source of white light 3 - 4 in order to illuminate the hologram.
Preferably, the point source of white light 3 - 4 is a high-efficiency light emitting diode. The means for mounting the point source of white light 3 - 5 may be telescopically or flexibly extensible so that the angle of incidence may be adjusted.
In another embodiment of the invention shown in Figure 5, a circular reflection-type hologram 5 - 1 projects an orthoscopic real image 5 -3. The circular reflection-type hologram 5 - 1 rotates inside a cylindrical casing 5-2.
Figure 6 shows a sectional view of the holographic display device along line I - I of Figure 5. A circular mount for supporting the hologram 6 - 1 has a plurality of legs at the bottom, comically converging to one point, and is rotatably attached to the top end of the cylindrical casing 5 -a. A power supply and a control circuit 6 -3 are securely attached to the cylindrical casing 5-2, and are operably connected to an electric motor 6 - 4 in order to rotate the circular mount for supporting the hologram 6-1.
In Figure 7, means for mounting the point source of white light 7 - 5 is substantially cylindrical and hollow, and has the same diameter as a cylindrical casing 7 -2 in order to slidably house the cylindrical casing 7 -2 at the bottom. Figure 8 shows the cylindrical casing 7 -2 open in order to expose a circular reflection-type hologram 8 - l, and to p=oject an orthoscopic real image 8 -3 when illuminated by a point source of white light 7 - 4.
An electric motor may be provided inside the cylindrical casing 7 - 2 in order to rotate the circular reflection-type hologram 8 - 1.
Preferably, the circular reflection-type hologram is computer-generated and has full colour. The holographic image may be overlaid with a real object having the same shape and size as the holographic image.
Claims (6)
1. A holographic display device for displaying a 3-dimensional image, comprising:
a singularity of horizontally-placed circular reflection-type hologram having a top surface;
a circular mount for supporting the hologram;
a cylindrical casing far supporting the circular mount;
a point source of white light for illuminating the hologram;
means for mounting the point source of white light; and a power supply and a control circuit, securely attached to the cylindrical casing, and operably connected to the point source of white light;
the horizontally-placed circular reflection-type hologram having both horizontal and vertical parallaxes, the horizontally-placed circular reflection-type hologram projecting an orthoscopic real image perpendicularly from the top surface of the hologram when illuminated by the point source of white light directly from above.
a singularity of horizontally-placed circular reflection-type hologram having a top surface;
a circular mount for supporting the hologram;
a cylindrical casing far supporting the circular mount;
a point source of white light for illuminating the hologram;
means for mounting the point source of white light; and a power supply and a control circuit, securely attached to the cylindrical casing, and operably connected to the point source of white light;
the horizontally-placed circular reflection-type hologram having both horizontal and vertical parallaxes, the horizontally-placed circular reflection-type hologram projecting an orthoscopic real image perpendicularly from the top surface of the hologram when illuminated by the point source of white light directly from above.
2. The holographic display 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.
3. The holographic display device for displaying a 3-dimensional image as defined in claim 1 or claim 2, 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.
4. The holographic display device for displaying a 3-dimensional image as defined in claim 1 or claim 2, in which the means for mounting the point source of white light is substantially cylindrical and hallow, having the same diameter as the cylindrical casing, and having the bottom portion defining a hole to slidably house the cylindrical casing.
5. A holographic display device for displaying a 3-dimensional image, comprising:
a singularity of horizontally-placed circular reflection-type hologram having a top surface;
a circular mount for rotatably supporting the hologram, having a plurality of legs at the bottom, conically converging to one point;
a cylindrical casing for supporting the circular mount;
an electric motor for rotating the circular mount, securely attached to the cylindrical casing; and a power supply and a control circuit, securely attached to the cylindrical casing, and operably connected to the electric motor;
the horizontally-placed circular reflection-type hologram having both horizontal and vertical parallaxes, the horizontally-placed circular reflection-type hologram projecting an orthoscopic real image perpendicularly from the top surface of the hologram when illuminated by the point source of white light directly from above.
a singularity of horizontally-placed circular reflection-type hologram having a top surface;
a circular mount for rotatably supporting the hologram, having a plurality of legs at the bottom, conically converging to one point;
a cylindrical casing for supporting the circular mount;
an electric motor for rotating the circular mount, securely attached to the cylindrical casing; and a power supply and a control circuit, securely attached to the cylindrical casing, and operably connected to the electric motor;
the horizontally-placed circular reflection-type hologram having both horizontal and vertical parallaxes, the horizontally-placed circular reflection-type hologram projecting an orthoscopic real image perpendicularly from the top surface of the hologram when illuminated by the point source of white light directly from above.
6. The holographic display device for displaying a 3-dimensional image as defined in claim 1 or claim 2 or claim 3 or claim 4 or claim 5, in which the circular reflection-type hologram is computer-generated, and has full colour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2277653 CA2277653C (en) | 1999-07-20 | 1999-07-20 | Cylindrical holographic display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2277653 CA2277653C (en) | 1999-07-20 | 1999-07-20 | Cylindrical holographic display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2277653A1 CA2277653A1 (en) | 2001-01-20 |
| CA2277653C true CA2277653C (en) | 2005-01-11 |
Family
ID=4163768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2277653 Expired - Fee Related CA2277653C (en) | 1999-07-20 | 1999-07-20 | Cylindrical holographic display device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2277653C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6844948B2 (en) * | 2002-03-27 | 2005-01-18 | Rabbit Tanaka Corporation Limited | Integral hologram revolving lamp and method for making same |
| KR101595104B1 (en) | 2008-07-10 | 2016-02-17 | 리얼 뷰 이미징 리미티드 | Broad viewing angle displays and user interfaces |
-
1999
- 1999-07-20 CA CA 2277653 patent/CA2277653C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2277653A1 (en) | 2001-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |