JP2002333598A - Stereoscopic picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stereoscopic picture display device capable of preventing the unevenness of shading from occurring on a displayed stereoscopic picture. SOLUTION: Two parabolic mirrors, that is, a lower parabolic mirror 11 and an upper parabolic mirror are formed to be rotationally symmetric with respect to an optical axis X passing through each center 11o or 12o, and have the shape of the parabolic mirror. The two parabolic mirrors, that is, the lower parabolic mirror 11 and the upper parabolic mirror are oppositely arranged in a state where the optical axes X are aligned. An aperture part 13 is provided on the mirror 12 and covered with a transparent member 14. An illuminator 15 is constituted of a light source 15a and a cover part 15b, and attached along the inner periphery of the vicinity of the bonding part of the two parabolic mirrors. It is good to make the illuminator 15a ring type illuminator where the optical axes of the two parabolic mirrors are set as center and also good to cover the aperture part 13 with a half mirror instead of the member 14 and turn on or off the illuminator 15.

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 two opposing parabolic mirrors as a stereoscopic image outside the parabolic mirror.

[0002]

2. Description of the Related Art As an example of a prior art illumination device for a three-dimensional image display device, a three-dimensional image provided with an illumination device for irradiating predetermined illumination light toward an object described in Japanese Patent Application Laid-Open No. 11-219144. An invention for a display device is disclosed.

[0003]

[Problems to be solved by the invention]

However, in the above-described illumination device of the three-dimensional image display device, since the upper parabolic mirror is provided at one place, the illumination device side of the object is bright and the opposite side of the object is dark. There was a problem that unevenness of light and darkness appeared in a three-dimensional image.

Accordingly, a first object of the present invention is to solve such a conventional problem and to provide a three-dimensional image display device in which a displayed three-dimensional image does not show uneven brightness.

A second object of the present invention is to provide a three-dimensional image display device in which light and dark unevenness does not appear in the three-dimensional image to be displayed.

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.

[0008]

According to the first aspect of the present invention, two parabolic mirrors are arranged so as to face each other with their optical axes coincident with each other. An opening is provided near the center of the parabolic mirror, an object is arranged near the center of the other parabolic mirror, and a three-dimensional image of the object is displayed through the opening.
An illumination device is arranged along an inner periphery near a joint of two parabolic mirrors.

According to a second aspect of the present invention, in order to achieve the second object, in the three-dimensional image display device according to the first aspect, the illumination device is a ring-shaped illumination device centered on the optical axis. , Characterized in that.

According to a third aspect of the present invention, in order to achieve the third object, in the three-dimensional image display device according to the first or second aspect, the opening is covered with a half mirror. .

[0011]

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

FIG. 1 is a schematic structural view showing an example of a stereoscopic image display device according to the present invention, and FIGS. 2 (A) and 2 (B).
FIG. 2 is a cross-sectional view and a perspective view showing a part of the stereoscopic image display device of FIG. 1 in an enlarged manner.

Reference numeral 11 in the drawing denotes a lower parabolic mirror.
The lower parabolic mirror 11 is manufactured by, for example, molding with a thermoplastic resin and then finishing only the inner side with a mirror finish by vapor deposition.

The lower parabolic mirror 11 includes a mirror section 11
a and ears 11b.

The mirror portion 11a of the lower parabolic mirror 11
Is formed to be rotationally symmetric about the optical axis X passing through the center 11o, has a parabolic mirror shape, and has a mirror surface inside.

The center 11o of the lower parabolic mirror 11
Is marked so that its position can be easily identified.

On the periphery of the mirror portion 11a of the lower parabolic mirror 11, a required number of small ear portions 11b are provided, and a hole M is provided substantially at the center thereof.

The upper parabolic mirror 12 placed on the lower parabolic mirror 11 is manufactured in the same manner as the lower parabolic mirror 11,
It has the same shape. However, the mirror section 12a of the upper parabolic mirror 12 is provided with an opening 13 near the center 12o. The periphery of the opening 13 has a step 13a
Is provided.

In addition, the ears 12b of the parabolic mirror 12
At a position corresponding to the ear 11b of the lower parabolic mirror 11, the periphery of the mirror 12a of the upper parabolic mirror 12 is formed to have substantially the same shape as the ear 11b of the lower parabolic mirror 11. The ear 12b is also provided with a hole N substantially at the center.

In the opening 13 of the upper parabolic mirror 12, a transparent member 14 made of, for example, an organic glass such as an acrylic resin, a polycarbonate or an AS resin or an inorganic glass is disposed.

In order to dispose the transparent member 14 in the opening 13 of the upper parabolic mirror 12, the step 13a of the opening 13 of the upper parabolic mirror 12 is slightly smaller than the size of the opening 13. The disk-shaped transparent member 14 is placed.

An illumination device 15 is mounted on the periphery of the mirror portion 12a of the upper parabolic mirror 12. The lighting device 15
It comprises a light source 15a and a cover 15b. Examples of the light source 15a include an incandescent lamp, a fluorescent lamp, and an LED. The cover 15b of the lighting device 15 has a parabolic mirror shape, and has a mirror surface inside.

The light source 15a is disposed at the focal point of the cover 15b. Therefore, the illumination light 18 from the light source 15a
Becomes a parallel ray when reflected by the cover portion 15b.
An object on the optical axis Z of the cover 15b can be efficiently irradiated.

Both sides of the cover 15b are rotatably supported by U-shaped support members L. Support member L
Is provided with a hole P at the center.

A plurality of illuminating devices 15 are mounted on the periphery of the mirror portion 12a of the upper parabolic mirror 12 at regular intervals.
In order to mount the illumination device 15 on the upper parabolic mirror 12, a hole Q is provided in the periphery of the mirror portion 12a of the upper parabolic mirror 12, and a bolt U is passed through the hole Q and the hole P of the support member L. The bolt U is fastened with a nut V.

After attaching the lighting device 15 to the upper parabolic mirror 12, the direction of the cover 15b of the lighting device 15 is
It is directed to the focal point 12f of the upper parabolic mirror 12.

Then, when assembling the three-dimensional image display device, first, the lower parabolic mirror 11 is fixed on a pedestal (not shown).

Next, two parabolic mirrors, a lower parabolic mirror 11 and an upper parabolic mirror 12, are arranged so as to face each other so that the optical axes X thereof coincide with each other. At this time, the ear portions 11b and 12b of the lower parabolic mirror 11 and the upper parabolic mirror 12, respectively.
Align the holes M and N provided in b.

Finally, a bolt C is passed through the hole M and the hole N, and the bolt C is fastened to a nut D to form a three-dimensional image display device.

As a result of the above configuration,
The focal point 11f of the lower parabolic mirror 11 is
And the focal point 12f of the upper parabolic mirror 12 is near the center 11o of the lower parabolic mirror 11.

The mirror section 12 of the upper parabolic mirror 12
As a result of attaching the illuminating device 15 to the periphery of “a”, the illuminating device 15 is arranged along the inner periphery near the junction of the two parabolic mirrors, the upper parabolic mirror 12 and the lower parabolic mirror 11.

Now, when displaying the three-dimensional image B of the object A, the transparent member 14 of the three-dimensional image display device is removed, and
The object A is placed inside the three-dimensional image display device, the object A is arranged at the center 11o of the marked lower parabolic mirror 11, and the opening 13 is closed again by the transparent member 14.

Next, the lighting device 15 is turned on. The illumination light 18 from the light source 15a of the illumination device 15 is reflected by the object A, then reflected between the upper parabolic mirror 12 and the lower parabolic mirror 11, passes through the opening 13, and the focal point 11f of the lower parabolic mirror 11 The three-dimensional image B of the object A is located near the focal point 11f of the lower parabolic mirror 11 outside the parabolic mirror.
Is displayed.

In the three-dimensional image display device shown in FIG. 1, the illuminating devices 15 are arranged along the inner periphery near the junction of the two parabolic mirrors, and a plurality of the illuminating devices 15 are attached at regular intervals. As a result, the area around the object A is uniformly irradiated. For this reason, it is possible to provide a three-dimensional image display device in which the three-dimensional image B displayed by the light reflected by the object A does not show uneven brightness.

For the lower parabolic mirror 11 and the upper parabolic mirror 12, after forming a parabolic mirror shape with a thermoplastic resin, only the inner side is mirror-finished by vapor deposition. After forming the parabolic mirror shape with resin, only the inner side may be plated, or a parabolic mirror shape may be made of high-purity aluminum, and only the inner side may be brilliantly finished to have a mirror surface. The point is that the inside should be a mirror surface.

FIG. 3 shows a ring-shaped illumination device 1 centered on an optical axis X instead of the illumination device 15 of the stereoscopic image display device of FIG.
FIG. 9 is a schematic configuration diagram of another example of a three-dimensional image display device in which 9 is arranged.

As a light source of the ring-shaped illumination device 19,
For example, a ring-shaped fluorescent lamp is used and arranged around the lower parabolic mirror 11 around the optical axis X of the upper parabolic mirror 12 and the lower parabolic mirror 11.

As a result, the ring-shaped illuminating device 19 having the above-described configuration has an inner periphery near the junction of the two parabolic mirrors, the lower parabolic mirror 11 and the upper parabolic mirror 12. This means that they are arranged along the entire circumference.

The ring-shaped illuminating device 19 is divided into a required number and mounted.
It is good.

Although an example of the ring-shaped lighting device 19 is a ring-shaped fluorescent lamp, a ring-shaped neon tube may be used, or an incandescent light bulb or an LED or the like may be arranged and formed into a ring. Of course it is good.

In the three-dimensional image display apparatus shown in FIG. 3, the area around the object A is more uniformly illuminated by the ring-shaped illumination device 19 centered on the optical axis X. For this reason, it is possible to provide a three-dimensional image display device in which light and dark unevenness does not appear in the three-dimensional image B displayed by the light reflected by the object A.

FIGS. 4 and 5 show a half mirror 20 instead of the transparent member 14 in the opening 13 of the three-dimensional image display device of FIG.
FIG. 9 is a schematic configuration diagram of still another example of a three-dimensional image display device covered with. Ring-shaped illumination device 19 for a stereoscopic image display device
Is turned off in FIG. 4 and turned on is shown in FIG.

The half mirror 20 is a reflecting mirror that reflects part of incident light and transmits part of the incident light.

An example of the half mirror 20 is as follows.
There is a chrome half mirror in which chromium is not vapor-deposited on a parallel flat plate substrate, and the incident light at 45 ° is divided into reflected light and transmitted light in two equal parts.

In the three-dimensional image display device, when the brightness of the inside and the outside of the three-dimensional image display device are compared, when the outside is bright, the three-dimensional image is not visible, and when the inside is bright, the three-dimensional image B is visible.

In the three-dimensional image display device shown in FIG. 4, the ring-shaped illumination device 19 is not turned on,
When the brightness of the inside and the outside of the three-dimensional image display device is compared by fitting the half mirror 20 in 3, since the outside is always bright, the three-dimensional image is not always visible.

In the stereoscopic image display device shown in FIG. 5, since the ring-shaped illumination device 19 is turned on, the illumination light 18 from the ring-shaped illumination device 19 makes the interior of the stereoscopic image display device brighter than the outside. . In the above case, since the inside becomes bright, the stereoscopic image B becomes visible.

Therefore, the three-dimensional image display device shown in FIGS. 4 and 5 can easily display or non-display the three-dimensional image B by turning on or off the ring-shaped illumination device 19. An apparatus can be provided.

[0049]

As described above, according to the first aspect of the present invention, a plurality of illuminating devices are arranged along the inner periphery near the junction of two parabolic mirrors, so that the illuminating device surrounds the object. Is uniformly illuminated, so that a three-dimensional image display device can be provided in which light and dark unevenness does not appear in a three-dimensional image displayed by light reflected by the object.

According to the second aspect of the present invention, since the illuminating device is a ring-shaped illuminating device centered on the optical axis, it is possible to provide a three-dimensional image display device in which the displayed three-dimensional image does not show uneven brightness. .

According to the third aspect of the present invention, since the opening is covered with the half mirror, a three-dimensional image is not displayed when the ring-shaped illumination device is turned off, and a three-dimensional image is displayed when the ring-shaped lighting device is turned on. Can be displayed, so that it is possible to provide a stereoscopic image display device capable of easily displaying or not displaying a stereoscopic image.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of a stereoscopic image display device according to the present invention.

2A and 2B show a part of the stereoscopic image display device of FIG. 1, wherein FIG. 2A is a cross-sectional view of an ear of a parabolic mirror, and FIG. 2B is a perspective view of a lighting device.

FIG. 3 is a schematic configuration diagram showing another example of a three-dimensional image display device.

FIG. 4 is a schematic configuration diagram showing still another example of a three-dimensional image display device.

5 is a schematic configuration diagram when a ring-shaped illumination device is turned on in the stereoscopic image display device of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lower parabolic mirror 12 Upper parabolic mirror 13 Opening 14 Transparent member 15 Illumination device 18 Illumination light 19 Ring-shaped illumination device 20 Half mirror A Object B Solid image X Optical axis

Claims (3)

[Claims] 1. An apparatus according to claim 1, wherein two parabolic mirrors are arranged so as to face each other with their optical axes coincident with each other. And a three-dimensional image display device that displays a three-dimensional image of the object in space through the opening portion, wherein an illuminating device is disposed along an inner periphery near a joint of the two parabolic mirrors. , Stereoscopic image display device. 2. The three-dimensional image display device according to claim 1, wherein the lighting device is a ring-shaped lighting device centered on the optical axis. 3. The three-dimensional image display device according to claim 1, wherein the opening is covered with a half mirror.