JP2002268011A - Stereoscopic image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic image display device which can be assembled with ease at a low cost and made large-sized. SOLUTION: A lower parabolic surface mirror 11 and an upper parabolic surface mirror 12 are sectioned in a parabolic shape along an arbitrary segment passing their center 11o or 12o, The upper parabolic surface mirror 12 is provided with an opening part 13, which is covered with a transparent member 14 made of, for example, acrylic resin. The two parabolic surface mirrors are arranged opposite each other so that their optical axes meet each other. A lighting means may be provided inside the parabolic surface mirrors; and the opening part 13 may be covered with a half-mirror instead of the transparent member 14 and the lighting means may be turned on or off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device for displaying an object inside a pair of parabolic mirrors arranged opposite to each other as a stereoscopic image outside the parabolic mirror.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 11-219144 discloses that
An invention in which an opening near the center of a parabolic mirror is covered by a liquid crystal unit is disclosed. According to the present invention, since the transmittance of incident light changes with a change in the voltage applied to the liquid crystal unit, a stereoscopic image can be displayed or not displayed.

However, there is a problem that the liquid crystal unit is expensive. Further, there is another problem that electrical control of the liquid crystal unit changes the transmittance of incident light to the inside of the three-dimensional image display device, so that electrical wiring is required at the time of assembly.
Furthermore, with the current technology, there is also a problem that the size of the area of the liquid crystal that can be manufactured is limited, so that the size of the stereoscopic image display device cannot be increased.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the first object of the present invention is to provide an inexpensive, easily assembled and large-sized stereoscopic image display device.

Another object of the present invention is to provide a clear stereoscopic image display device.

A third object of the present invention is to provide a three-dimensional image display device capable of easily displaying or not displaying a three-dimensional image.

A fourth object of the present invention is to provide a three-dimensional image display device that allows a person to access the vicinity of an image.

[0007]

Accordingly, the present invention provides
To achieve the first object, two parabolic mirrors are arranged to face each other, an opening is provided near the center of one parabolic mirror, and an object is placed near the center of the other parabolic mirror. In a three-dimensional image display device which is arranged and displays a three-dimensional image of an object outside the parabolic mirror through the opening near the focal point of the other parabolic mirror, the opening is covered with a transparent member. .

According to a second aspect of the present invention, in order to achieve the second object, in the first aspect of the present invention, a lighting device is provided inside the three-dimensional image display device.

According to a third aspect of the present invention, in order to achieve the second object, the three-dimensional image display device according to the second aspect further comprises a condensing means for condensing the light of the illuminating means. It is characterized by.

According to a fourth aspect of the present invention, in order to achieve the third object, in the stereoscopic image display device according to the second or third aspect, the transparent member is a half mirror.
It has lighting means.

According to a fifth aspect of the present invention, in order to achieve the fourth object, in the three-dimensional image display device according to the first, second, third, or fourth aspect, a person can access the opening near the opening. An access table is provided to cover an upper part of the parabolic mirror.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a first embodiment of a stereoscopic image display apparatus according to the present invention. Reference numeral 11 in the drawing denotes a lower parabolic mirror. The lower parabolic mirror 11 has a three-dimensional shape in which the cross-sectional shape of an arbitrary line segment passing through the center 11o is a parabola.

The lower parabolic mirror 11 is, for example,
After molding a parabolic mirror shape with a thermoplastic resin, only the inside is mirror-finished by vapor deposition.

The upper parabolic mirror 12 is a lower parabolic mirror 1
1 but the center 12 of the upper parabolic mirror 12
The difference from the lower parabolic mirror 11 is that the opening 13 is provided in a circular shape near o. A step 13 a is provided on the inner peripheral surface below the opening 13 and protrudes from the inner peripheral surface of the opening 13.

The focal length of the focal point 11f of the lower parabolic mirror 11 and the focal length of the focal point 12f of the upper parabolic mirror 12 are substantially equal. When molding the thermoplastic resin,
A required number of substantially flat tabs (not shown) are provided around the lower parabolic mirror 11, and bolt holes are provided in the tabs. Around the upper parabolic mirror 12, ears similar to the lower parabolic mirror 11 are provided at locations corresponding to the ears of the lower parabolic mirror 11, and similar bolt holes are provided.

The lower parabolic mirror 11 and the upper parabolic mirror 12 are formed by forming a parabolic mirror shape with a thermoplastic resin and then mirror-finishing only the inner side by vapor deposition. After molding the parabolic mirror shape at
Only the inside may be plated, or the shape may be made of high-purity aluminum, and the inside may be brightly finished to provide a mirror surface. The point is that the inside should be a mirror surface.

Step 1 of opening 13 of upper parabolic mirror 12
The top of 3a is covered with a transparent member 14 made of, for example, acrylic resin and having a substantially flat circular shape.

An example of the material of the transparent member 14 is acrylic resin, but glass, polycarbonate resin, or A
A material such as S resin may be used.

For this reason, the materials of the transparent member 14 are all inexpensive, easy to assemble into a three-dimensional image display device, and can be enlarged.

Then, the lower parabolic mirror 11 is fixed on a base (not shown). Next, two parabolic mirrors, a lower parabolic mirror 11 and an upper parabolic mirror 12, are arranged to face each other so that the optical axes thereof coincide. At this time, the bolt holes provided in the ears of the lower parabolic mirror 11 and the upper parabolic mirror 12 are aligned, and the focal point 11f of the lower parabolic mirror 11 is near the center 12o of the upper parabolic mirror 12, Positioning is performed such that the focal point 12f of the upper parabolic mirror 12 is near the center 11o of the lower parabolic mirror 11. Finally, the lower parabolic mirror 11 and the upper parabolic mirror 12 are fastened with bolts to form a three-dimensional image display device.

In the three-dimensional image display device of the first example, the transparent member 14 is removed, the object A is placed inside the three-dimensional image display device, the object A is arranged near the center 11o of the lower parabolic mirror 11, and then again. The transparent member 14 is arranged at the same position.

The light 20 reflected by the object A is reflected between the lower parabolic mirror 11 and / or the upper parabolic mirror 12, and then passes through the opening 13 to be focused on the focal point 11f of the lower parabolic mirror 11. Since the light is emitted, a three-dimensional image B of the object A is displayed near the focal point 11f of the lower parabolic mirror 11 outside the parabolic mirror.

For this reason, the three-dimensional image display device of the first example prevents contamination and damage of the lower parabolic mirror 11 and the upper parabolic mirror 12 due to the entry or fall of foreign matter into the three-dimensional image display device. In addition, it is possible to provide an inexpensive, easily assembled, and large-sized stereoscopic image display device.

FIGS. 2 and 3 show a stereoscopic image display device of a second example. FIG. 2 is a sectional view of the entire stereoscopic image display device, and FIG. The three-dimensional image display device of the second example has the illumination unit 15 inside the three-dimensional image display device of the first example.

The illumination means 15 comprises a light source 15a and a mounting member 15b.

An example of the illuminating means 15 is as follows.
a is an incandescent lamp. The attachment member 15b has a unit for supplying electric power to the light source 15a. Two illumination means 15 are mounted inside the upper parabolic mirror 12 near the opening 13. The direction of the light source 15a is the focal point 1 of the upper parabolic mirror 12.
Turn to 2f. The light source 15a is screwed into the mounting member 15b,
The mounting member 15b is screwed to the upper parabolic mirror 12.

The number of illumination means 15 is not limited to one, and a plurality of illumination means 15 may be provided. In addition, as an example of an arrangement in the case where a plurality of illumination means 15 are provided, it is conceivable to arrange them in a ring shape. Also, an incandescent light bulb is used as an example of the light source 15a, but any light source such as a fluorescent light or an LED may be used.

In the stereoscopic image display apparatus of the second example, the light source 15a
A part of the emitted light 20 directly illuminates the object A, and the light 2
A part of 0 illuminates the object A after being reflected by the lower parabolic mirror 11 and / or the upper parabolic mirror 12. The light 20 illuminating the object A is reflected by the object A,
3, the light is condensed at the focal point 11f of the lower parabolic mirror 11, and the focal point 11 of the lower parabolic mirror 11 is outside the parabolic mirror.
The three-dimensional image B of the object A is clearly displayed near f.

For this reason, the incident light from the opening can be supplemented by the light 20 from the light source 15a of the illuminating means 15. Therefore, even when the surrounding brightness is insufficient, the object A is illuminated brightly. A clear stereoscopic image display device can be provided.

FIG. 4 is a partially enlarged sectional view showing a three-dimensional image display device of a third example. The stereoscopic image display device of the third example is
The three-dimensional image display device of the example is provided with a light collecting means 16 for collecting the light 20 of the lighting means 15.

The light collecting means 16 comprises a light collecting lens 16a, a support member 16b, and a mirror 16c. As an example, a convex lens is used as the condenser lens 16a, and the periphery of the condenser lens 16a is provided with four supporting members 1 provided at four locations.
6b, it is attached to the mirror 16c. Mirror 1
6c covers the upper hemisphere of the light source 15a of the illumination means 15 and is screwed to the upper parabolic mirror 12. further,
The diameter of the condenser lens 16a is substantially equal to the diameter of the inner surface of the mirror 16c.

In the three-dimensional image display apparatus of the third example, the illumination means 1
5, the light 20 from the light source 15a is condensed by the condenser lens 16a refracting the light 20;
Is reflected by the mirror 16c and condensed to illuminate the object A more brightly. The light 20 illuminating the object A is reflected by the object A, and then is condensed at the focal point 11f of the lower parabolic mirror 11 through the opening 13 and near the focal point 11f of the lower parabolic mirror 11 outside the parabolic mirror. , A three-dimensional image B of the object A is displayed more clearly.

For this reason, the light 20 from the light source 15a of the illuminating means 15 is illuminated more brightly on the object A by the condensing means 16, so that a clearer stereoscopic image display apparatus can be provided.

FIGS. 5 and 6 are sectional views showing a stereoscopic image display device of a fourth example. The stereoscopic image display device of the fourth example is:
The transparent member 14 of the opening 13 of the stereoscopic image display device of the first example is a half mirror 17, and the illumination device of the stereoscopic image display device of the second or third example is provided. In the three-dimensional image display device of FIG.
In the three-dimensional image display device, the illumination means 15 is turned on.

The half mirror 17 is a reflecting mirror that reflects part of incident light and transmits part of the incident light.

As an example of the half mirror 17, there is a chrome half mirror which is formed by depositing chromium on a parallel flat plate substrate and divides 45 ° incident light into two equal parts, a reflected light and a transmitted light.

In the three-dimensional image display device of the fourth example, when the brightness of the inside of the three-dimensional image display device is compared with that of the outside, the three-dimensional image B is not visible when the outside is bright, and the three-dimensional image is not visible when the outside is dark. Image B is visible.

In the three-dimensional image display device shown in FIG. 5, the illumination means 15 is turned off. Further, since the half mirror 17 is fitted into the opening 13, a part of the light from the outside is reflected and a part of the light is transmitted. Therefore, when the brightness of the inside of the three-dimensional image display device is compared with that of the outside, the outside is always bright, and the three-dimensional image B is not always visible.

In the three-dimensional image display device shown in FIG. 6, the lighting means 15 is turned on. Therefore, the light 20 emitted from the illumination means 15 makes the inside of the three-dimensional image display device brighter than the outside. Therefore, when the brightness of the inside of the three-dimensional image display device is compared with that of the outside, the outside becomes dark, and the three-dimensional image B becomes visible.

Therefore, when the lighting means 15 is turned off, a three-dimensional image is not displayed, and when it is turned on, a three-dimensional image can be displayed.

FIG. 7 is a sectional view showing a stereoscopic image display device of a fifth example. The fifth example of the stereoscopic image display device covers the upper part of the parabolic mirror 11 so that a person can access the opening 13 of the first example of the stereoscopic image display device.
8 are provided.

The three-dimensional image display device of the fifth example has an access table 1
8 and the transparent member 14 covering the opening 13 of the upper parabolic mirror 12 have the same upper surface height position.

FIG. 8 is a perspective view showing a stereoscopic image display device of a sixth example. In the stereoscopic image display device of the sixth example, a stage device 19 is added to the upper part of the access stand 18 of the stereoscopic image display device of the fifth example.

Since the access table 18 allows a person to access the vicinity of the opening 13, the stereoscopic image display device of the fifth example or the stereoscopic image display device of the sixth example can be used, for example, as a theater stage device.

The parabolic mirror according to the present invention is a mirror that reflects light and condenses it at a focal point.

Therefore, even when a part of the shape of the parabolic mirror is changed in order to correct the aberration of light, substantially the same effect as that of the parabolic mirror can be obtained. For this reason, the parabolic mirror in the present invention includes a mirror that can obtain substantially the same effect as the parabolic mirror even when such a partial shape is changed.

[0048]

As described above, according to the present invention, by covering the opening with the transparent member,
Since the transparent member is inexpensive, easy to assemble into a three-dimensional image display device, and can be made large, the lower parabolic mirror and the upper parabolic mirror due to foreign matter entering or falling into the three-dimensional image display device can be used. It is possible to provide a stereoscopic image display device which can prevent the parabolic mirror from being contaminated and damaged, and which can be inexpensively, easily assembled, and large-sized.

According to the second aspect of the present invention, since the illuminating means is provided inside the three-dimensional image display device, the surrounding light can be supplemented by the illuminating means such as an incandescent light bulb to supplement the light incident from the opening. Even when the image quality is insufficient, a clear stereoscopic image display device can be obtained.

According to the third aspect of the present invention, since the light converging means for condensing the light of the illuminating means is provided, the object is illuminated more brightly by condensing the light of the illuminating means. Further, a clear stereoscopic image display device can be provided.

According to the fourth aspect of the present invention, the transparent member is formed as a half mirror, and the illuminating means is provided. When the illuminating means is turned off, a three-dimensional image is not displayed. By displaying a stereoscopic image, it is possible to provide a stereoscopic image display device capable of easily displaying or not displaying a stereoscopic image.

According to the fifth aspect of the present invention, the access table is provided so as to cover the upper part of the parabolic mirror so that a person can access the vicinity of the opening. Since a three-dimensional image on the opening can be accessed, a three-dimensional image display device that can be used as, for example, a stage device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first example of a stereoscopic image display device according to the present invention.

FIG. 2 is a cross-sectional view illustrating a stereoscopic image display device of a second example.

FIG. 3 is a partially enlarged sectional view of FIG. 2;

FIG. 4 is a partially enlarged cross-sectional view showing a three-dimensional image display device of a third example.

FIG. 5 is a sectional view showing a stereoscopic image display device of a fourth example.

6 is a cross-sectional view of the stereoscopic image display device shown in FIG. 5, in which lighting means is turned on.

FIG. 7 is a cross-sectional view illustrating a stereoscopic image display device according to a fifth example.

FIG. 8 is a perspective view showing a stereoscopic image display device of a sixth example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lower parabolic mirror 12 Upper parabolic mirror 13 Opening 14 Transparent member 15 Illumination means 16 Condensing means 17 Half mirror 18 Access stand 19 Stage equipment 20 Light A Object B Solid image

Claims (5)

[Claims] 1. Two parabolic mirrors are arranged facing each other,
An opening is provided near the center of one of the parabolic mirrors, an object is placed near the center of the other parabolic mirror, and through the opening near the focal point of the other parabolic mirror, outside the parabolic mirror. A three-dimensional image display device for displaying a three-dimensional image of an object on an object, wherein the opening is covered with a transparent member. 2. The three-dimensional image display device according to claim 1, further comprising illumination means inside the three-dimensional image display device. 3. The three-dimensional image display device according to claim 2, further comprising a light condensing means for condensing the light of said illumination means. 4. The three-dimensional image display device according to claim 2, wherein the transparent member is a half mirror and the illumination device is provided. 5. The three-dimensional object according to claim 1, wherein an access base is provided to cover a parabolic mirror so that a person can access the vicinity of the opening. Image display device.