JPH0534631A - Image forming device - Google Patents

Abstract

PURPOSE:To make an image visible extending over a wide visual field by a simple structure, in the case an image reflected on a concave mirror is utilized so that its image looks the real thing. CONSTITUTION:A concave mirror 1 is formed roughly hemispherically, the front of the hemispherical concave mirror 1 is covered with a cover plate 2, and also, a peephole 5 is provided in the vicinity of the center part of the cover plate 2, and in a position of the reverse side of the cover plate 2 of the opposite side by placing a radius passing through the spherical center 0 of the concave mirror 1 between against the peephole 5, an installation space for an object M to be photographed is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for showing an image reflected on a concave mirror as if a real object were present.

[0002]

2. Description of the Related Art Since human beings are curious animals,
Showing a mysterious phenomenon can attract a lot of people to it. For this reason, a mysterious phenomenon is often used as a medium for advertising.

[0003] Conventionally, as one of the mysterious phenomena of this kind, there has been one that utilizes a mirror image to make the image look as if it were a real thing. In other words, because it looks like a real thing, even if you try to grab it, you cannot grab it because it is an image. However, all of the conventional proposals are not always satisfactory because the field of view (angle) for making a mysterious phenomenon visible is narrowly limited or the manufacturing is troublesome.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image forming apparatus which allows a user to view a mysterious phenomenon with a simple structure in a wide field of view when the image reflected on a concave mirror is used. To do.

[0005]

According to the present invention for achieving the above object, a concave mirror is formed in a substantially hemispherical shape, and the front surface of the concave mirror having the hemispherical shape is covered with a cover plate, and a peep near the central portion of the cover plate. A window is provided, and an object installation space is provided at a position on the opposite side of the cover plate opposite to the viewing window with a radius passing through the spherical center of the concave mirror interposed therebetween.

With the above structure, the real image of the subject reflected on the concave mirror can be made to appear as if a real object were present in the viewing window, but since it is an image, it is a mysterious existence that cannot be held by the user. It can be shown as a thing. Moreover, with a simple structure in which the concave mirror is formed in a hemispherical shape, the real image reflected in the viewing window can be viewed over a wide range of approximately 180 ° vertically and horizontally at the front position of the cover plate.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an image forming apparatus according to an embodiment of the present invention.

In the figure, 1 is a concave mirror, 2 is a cover plate, and 3 is a casing. The concave mirror 1 is composed of a half (hemisphere) of a sphere centered on the spherical center O. This concave mirror 1
The main body 1a is made of a highly transparent resin such as an acrylic resin or a styrene resin, and an annular flange 4 is integrally formed at its edge. As shown in FIG. 2, a metal vapor deposition film 1b is formed on the surface of the main body 1a on the convex side (rear surface side), and a protective film 1c such as paint is formed on the upper surface thereof. As described above, in the concave mirror 1, since the metal vapor deposition film is not applied to the concave surface side, but the metal vapor deposition film 1b is applied to the back surface side of the convex surface, the mirror surface can have a high smoothness surface. Will enable you to obtain high resolution images.

The front surface of the concave mirror 1 has a flange 4 on its outer circumference.
It is covered by fixing the cover plate 2 to. A peep window 5 is provided in the central region of the cover plate 2 so that the inside can be seen from there. A lamp 11 is provided inside the cover plate 2 to illuminate the inside.
The lamp 11 may be provided outside the cover plate 2 if necessary. Further, an insertion opening 6 is provided above the concave mirror 1 so that a subject M such as a ring can be put in and taken out through the insertion opening 6. Subject M is a living thing,
It can be any of the animals.

The subject M should be installed on the back side of the cover plate 2 and on the opposite side of the viewing window 5 with the radius of the concave mirror 1 (radius passing through the spherical center O) interposed therebetween. To More preferably, the location of the subject M should be close to the ball center O as shown in FIG. The location of the subject M does not necessarily have to be above the viewing window 5 as in the example of FIG. 1, but may be placed next to the viewing window 5 as shown in FIG. B)
You may put it on the lower side like.

In this embodiment, the subject M is suspended by a linear body 7, and the linear body 7 is driven to rotate by a motor 8. The motor 8 is fixed to the cover plate 9 and is detachable from the casing 3. Of course, it is not a necessary condition for the subject M to be hung on the linear body 7, and it may be allowed to stand still on the shelf plate 10 provided on the back surface of the cover plate 1 or the like.

The image forming apparatus of the present invention having the above structure can make the real image of the subject M reflected on the concave mirror 1 visible through the viewing window 5 according to the following principle. That is, among the light rays emitted from the subject M, the light rays traveling in parallel to the radial line L passing through the spherical center O are reflected by the concave mirror 1 and then pass through the focal point F, and also from the subject M via the focal point F and the concave mirror 1 The ray reflected by the light travels parallel to the radial line L passing through the spherical center O. Therefore, the real image M ′ of the subject M is formed at the symmetrical position of the viewing window 5 across the line L.
The real image M ′ thus obtained appears to the eyes E of the person who sees it from the front as if the subject M actually exists at that position.

However, since the image is reflected on the concave mirror 1,
It seems strange to anyone who doesn't know the principle, because they can't hold on to it. Moreover,
In this image forming apparatus, since the concave mirror 1 is formed in a hemispherical shape, the real image M ′ is not seen directly from the front side of the viewing window 5, but a wide visual field (range of angle θ) of about 180 °. Can be seen at.

In the hemispherical concave mirror as described above, a transparent resin plate such as acrylic resin is placed on a mold having a circular hole,
If this is sucked under negative pressure from the opposite side while being heated and deformed into a hemispherical shape, it can be easily molded without using an expensive mold.

[0015]

As described above, according to the present invention, the real image of the subject with respect to the concave mirror is formed on the part of the viewing window of the cover plate,
You can make it look as if the subject were actually there, but since it is a real image reflected in a concave mirror, you can think of it as a mysterious entity that you cannot hold even if you try to grab it. Moreover, by forming the concave mirror into a simple hemispherical shape, the hemispherical shape allows the real image to be viewed not only in front of the front of the viewing window but also in a wide field of view of about 180 °.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an image forming apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a part of a concave mirror in the apparatus of FIG. 1 in an enlarged manner.

3A and 3B are front views showing a part of a viewing window of an image forming apparatus according to another embodiment of the present invention.

[Explanation of symbols]

1 concave mirror 2 cover plate 3 casing 4 flange 5 viewing window M subject M'real image L radial line passing through the ball center O
O ball center

Claims (1)

[Claims] 1. A concave mirror is formed in a substantially hemispherical shape, the front surface of the concave mirror having a hemispherical shape is covered with a cover plate, and a peep window is provided near the central portion of the cover plate. An image forming apparatus, characterized in that an installation space for a subject is provided at a position on the opposite side of the cover plate on the opposite side of the radius passing through the ball center.