JPS5897040A - Stereoscopic photography - Google Patents

Abstract

PURPOSE:To obtain a stereoscopic photograph easily by arranging a group of pinholes in the reverse surface of a transparent plate and a group of microphotographs on the top surface, and transmitting light from the pinhole group side and viewing the transmitted light on the microphotograph group side. CONSTITUTION:A transparent plate 1 which has a pinhole group 2 in the reverse surface and a photosensitive surface 3' as the top surface is irradiated with light from a subject 6 from the pinhole group side 2 for a specific time to form a group 3 of microphotographs on the top surface. Then, the reverse surface is irradiated with light from a light source 4 and an observer observes its transmitted light on the surface side. Thus, a stereophonic photograph is obtained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a three-dimensional photograph in which the object that actually exists at a certain position behind the photographic surface appears as if it were seen through the photographic surface.

Similar stereoscopic photographs have been known in the past, including a method that applies diffraction and interference of laser beams, and a method in which microphotographs are viewed through a microconvex lens group consisting of a large number of microconvex lenses arranged in a mesh pattern.

The method that uses laser beams has the disadvantages of being unable to take pictures outside the darkroom and not being able to take color pictures. The method of applying micro-convex lenses has not been put to practical use because it takes time and effort to take multiple planar photographs of the subject during production. The object of the present invention is to provide a stereoscopic photograph free of such drawbacks.

As an example of implementation is shown in FIG. 1, the present invention includes a transparent plate 1,
It consists of a pinhole group 2 consisting of a large number of pinholes arranged in a mesh pattern on the back surface of the transparent plate 1, and a microphotograph group 3 consisting of a large number of microphotographs arranged in a mesh pattern on the front surface of the transparent plate 1. A viewer 5 who places the light source 4 toward the pinhole group 2 sees the light transmitted through the pinhole group 2 and the microphotograph group 3 from the microphotograph group 3.

As shown in FIG. 2, the microphotograph group 3 is a transparent plate 1 having a pinhole group 2 on the back side and a luminous surface 3' on the back side, and the light emitted from the object 6 is fixed directly from the pinhole group 2. The bright surface 3' is formed by exposing the bright surface 3' to light for a period of time and developing it. The brilliance agent on the brilliance surface 3' is the same as that of the reversal film. The reason why the microphotograph group 3 is formed in this way is because each pinhole in the pinhole group 2 serves as a pinhole in a pinhole camera, and the transparent plate 1 serves as a space within the pinhole camera. It is.

To explain the principle of the present invention according to FIG. 3, the luminous intensity in any direction 10 of the light emitted from the light source 4 and passing through any pinhole 8 of the pinhole group 2 and the microphotograph group 3 is expressed by the straight line 1
It is proportional to the transmittance of the microphotograph group 3 at the position of the point 9 that intersects with 0. The transmittance at the point 9 in the microphotograph group 3 is proportional to the luminous intensity in the straight line 10 direction of the light emitted from the subject 6 and passed through the pinhole 8 during photographing. Therefore, the luminous intensity in each direction of the light emitted from the light source 4 and passing through each pinhole in the pinhole group 2 and the microphotograph group 3 is the luminous intensity in the same direction of the light emitted from the subject 6 and passing through the same pinhole at the time of photography. is proportional to. The collection of such light emitted from the light source 4 creates a virtual image of the subject 6 at the position where the subject 6 was present at the time of photography.

In the above-described embodiment, only the light that has passed through the pinhole group 2 enters the eye, so there is a lot of wasted light. In order to eliminate this drawback, as shown in FIG. 4, a group of minute convex lenses 7 whose focal point is at the position of each pinhole is superimposed on the surface of the group of pinholes 2 of the above-mentioned embodiment to emit light from a point light source 4'. is focused on each pinhole through a group of minute convex lenses 7. Instead of the micro convex lens group 7, two lenticular plates stacked one on top of the other so that the directions of the lenses are perpendicular to each other may be used.

The stereoscopic photograph of the present invention is easy to produce because the stereoscopic photograph can be completed by one photographing and one development as described above. or,
Since photography uses natural light, any subject can be photographed, and color photography is also possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a specific example of a stereoscopic photograph according to the present invention, FIG. 2 is a side view showing a photographing method of the above specific example, and FIG. 3 is a partially enlarged sectional view showing the principle of the above specific example. FIG. 4 is a side view showing a specific example other than the above-described specific example. 1...Transparent plate 2...Pinhole group 3...Minute photo group 4...Light source 5...Viewer 6...Subject 7...Minute convex lens■

Claims (1)

[Claims] Transparent plate 1 and pinhole group 2 formed on the back side of transparent plate 1
and a microphotograph group 3 formed on the surface of the transparent plate 1,
A stereoscopic photograph in which light is transmitted from pinhole group 2 and the transmitted light is seen from microphotograph group 3.